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array:22 [ "pii" => "S1807593224001406" "issn" => "18075932" "doi" => "10.1016/j.clinsp.2024.100463" "estado" => "S250" "fechaPublicacion" => "2024-01-01" "aid" => "100463" "copyright" => "HCFMUSP" "copyrightAnyo" => "2024" "documento" => "article" "crossmark" => 1 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:1 [ "total" => 0 ] "itemSiguiente" => array:17 [ "pii" => "S1807593224001418" "issn" => "18075932" "doi" => "10.1016/j.clinsp.2024.100464" "estado" => "S250" "fechaPublicacion" => "2024-01-01" "aid" => "100464" "copyright" => "HCFMUSP" "documento" => "article" "crossmark" => 1 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:1 [ "total" => 0 ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original articles</span>" "titulo" => "Prognostic factors for local recurrence in patients with rectal cancer submitted to neoadjuvant chemoradiotherapy and total mesorectal excision" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => array:2 [ 0 => "en" 1 => "en" ] "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1700 "Ancho" => 2167 "Tamanyo" => 246183 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0006" "detalle" => "Fig. " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">Flowchart.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Caio Sergio Rizkallah Nahas, Sergio Carlos Nahas, Carlos Frederico Sparapan Marques, Ulysses Ribeiro Junior, Leonardo Bustamante-Lopez, Guilherme Cutait Cotti, Antonio Rocco Imperiale, Rodrigo Ambar Pinto, Ivan Cecconello" "autores" => array:9 [ 0 => array:2 [ "nombre" => "Caio Sergio Rizkallah" "apellidos" => "Nahas" ] 1 => array:2 [ "nombre" => "Sergio Carlos" "apellidos" => "Nahas" ] 2 => array:2 [ "nombre" => "Carlos Frederico Sparapan" "apellidos" => "Marques" ] 3 => array:2 [ "nombre" => "Ulysses" "apellidos" => "Ribeiro Junior" ] 4 => array:2 [ "nombre" => "Leonardo" "apellidos" => "Bustamante-Lopez" ] 5 => array:2 [ "nombre" => "Guilherme Cutait" "apellidos" => "Cotti" ] 6 => array:2 [ "nombre" => "Antonio Rocco" "apellidos" => "Imperiale" ] 7 => array:2 [ "nombre" => "Rodrigo Ambar" "apellidos" => "Pinto" ] 8 => array:2 [ "nombre" => "Ivan" "apellidos" => "Cecconello" ] ] ] ] "resumen" => array:1 [ 0 => array:3 [ "titulo" => "Highlights" "clase" => "author-highlights" "resumen" => "<span id="abss0001" class="elsevierStyleSection elsevierViewall"><p id="spara014" class="elsevierStyleSimplePara elsevierViewall"><ul class="elsevierStyleList" id="celist0001"><li class="elsevierStyleListItem" id="celistitem0001"><span class="elsevierStyleLabel">•</span><p id="para0001" class="elsevierStylePara elsevierViewall">Rectal cancer recurrence occurs predominantly in distant organs.</p></li><li class="elsevierStyleListItem" id="celistitem0002"><span class="elsevierStyleLabel">•</span><p id="para0002" class="elsevierStylePara elsevierViewall">Local recurrence of rectal cancer could be predicted on restaging MRI.</p></li><li class="elsevierStyleListItem" id="celistitem0003"><span class="elsevierStyleLabel">•</span><p id="para0003" class="elsevierStylePara elsevierViewall">Rectal cancer recurrence of patients treated with long course chemoradiation and total mesorectal excision is low and is associated with pathologic involvement of the radial surgical margin.</p></li></ul></p></span>" ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593224001418?idApp=UINPBA00004N" "url" => "/18075932/000000790000000C/v123_202411010523/S1807593224001418/v123_202411010523/en/main.assets" ] "itemAnterior" => array:16 [ "pii" => "S1807593224001492" "issn" => "18075932" "doi" => "10.1016/j.clinsp.2024.100472" "estado" => "S250" "fechaPublicacion" => "2024-01-01" "aid" => "100472" "documento" => "article" "crossmark" => 1 "subdocumento" => "fla" "abierto" => array:3 [ "ES" => false "ES2" => false "LATM" => false ] "gratuito" => false "lecturas" => array:1 [ "total" => 0 ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original articles</span>" "titulo" => "Peripheral and brainstem auditory evaluation in post-COVID-19 individuals" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => array:2 [ 0 => "en" 1 => "en" ] "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1318 "Ancho" => 2333 "Tamanyo" => 271241 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0009" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">Inclusion and exclusion criteria flowchart.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Lucas Pinto Mielle, Maria Vanderléia Araujo Maximiano, Ivone Ferreira Neves-Lobo, Liliane Aparecida Fagundes Silva, Alessandra C. Goulart, Carla Romagnolli, Gerson Sobrinho Salvador de Oliveira, Alessandra Giannella Samelli, Carla Gentile Matas" "autores" => array:9 [ 0 => array:2 [ "nombre" => "Lucas Pinto" "apellidos" => "Mielle" ] 1 => array:2 [ "nombre" => "Maria Vanderléia Araujo" "apellidos" => "Maximiano" ] 2 => array:2 [ "nombre" => "Ivone Ferreira" "apellidos" => "Neves-Lobo" ] 3 => array:2 [ "nombre" => "Liliane Aparecida Fagundes" "apellidos" => "Silva" ] 4 => array:2 [ "nombre" => "Alessandra C." "apellidos" => "Goulart" ] 5 => array:2 [ "nombre" => "Carla" "apellidos" => "Romagnolli" ] 6 => array:2 [ "nombre" => "Gerson Sobrinho Salvador" "apellidos" => "de Oliveira" ] 7 => array:2 [ "nombre" => "Alessandra Giannella" "apellidos" => "Samelli" ] 8 => array:2 [ "nombre" => "Carla Gentile" "apellidos" => "Matas" ] ] ] ] "resumen" => array:1 [ 0 => array:3 [ "titulo" => "Highlights" "clase" => "author-highlights" "resumen" => "<span id="abss0001" class="elsevierStyleSection elsevierViewall"><p id="spara014" class="elsevierStyleSimplePara elsevierViewall"><ul class="elsevierStyleList" id="celist0001"><li class="elsevierStyleListItem" id="celistitem0001"><span class="elsevierStyleLabel">•</span><p id="para0002" class="elsevierStylePara elsevierViewall">Vestibulocochlear disorders can be caused by COVID-19 infection.</p></li><li class="elsevierStyleListItem" id="celistitem0002"><span class="elsevierStyleLabel">•</span><p id="para0003" class="elsevierStylePara elsevierViewall">Sensorineural hearing loss can be present without clinical symptoms.</p></li><li class="elsevierStyleListItem" id="celistitem0003"><span class="elsevierStyleLabel">•</span><p id="para0004" class="elsevierStylePara elsevierViewall">Electrophysiological tests suggest an abnormal auditory pathway after COVID-19.</p></li><li class="elsevierStyleListItem" id="celistitem0004"><span class="elsevierStyleLabel">•</span><p id="para0005" class="elsevierStylePara elsevierViewall">The use of ototoxic drugs during COVID-19 can worsen hearing.</p></li></ul></p></span>" ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593224001492?idApp=UINPBA00004N" "url" => "/18075932/000000790000000C/v123_202411010523/S1807593224001492/v123_202411010523/en/main.assets" ] "en" => array:19 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">Original articles</span>" "titulo" => "Computed tomography attenuation in differential diagnosis of transudative and exudative pleural effusions" "tieneTextoCompleto" => true "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Aziz Gümüş, Neslihan Özçelik, Bilge Yılmaz Kara, Nur Hürsoy, Neşe Merve Güner Zırıh, Songül Özyurt, Ünal Şahin" "autores" => array:7 [ 0 => array:4 [ "nombre" => "Aziz" "apellidos" => "Gümüş" "email" => array:1 [ 0 => "aziz.gumus@erdogan.edu.tr" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "PC_aff9BTYpZ5wJO" ] ] ] 1 => array:4 [ "nombre" => "Neslihan" "apellidos" => "Özçelik" "email" => array:1 [ 0 => "neslihan.ozcelik@erdogan.edu.tr" ] "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "PC_aff9BTYpZ5wJO" ] 1 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0001" ] ] ] 2 => array:4 [ "nombre" => "Bilge" "apellidos" => "Yılmaz Kara" "email" => array:1 [ 0 => "bilge.yilmazkara@erdogan.edu.tr" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "PC_aff9BTYpZ5wJO" ] ] ] 3 => array:4 [ "nombre" => "Nur" "apellidos" => "Hürsoy" "email" => array:1 [ 0 => "nur.hursoy@erdogan.edu.tr" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">b</span>" "identificador" => "PC_affq3JxETHRMY" ] ] ] 4 => array:4 [ "nombre" => "Neşe Merve Güner" "apellidos" => "Zırıh" "email" => array:1 [ 0 => "nesemerve.gunerzirih@erdogan.edu.tr" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "PC_aff9BTYpZ5wJO" ] ] ] 5 => array:4 [ "nombre" => "Songül" "apellidos" => "Özyurt" "email" => array:1 [ 0 => "songul.ozyurt@erdogan.edu.tr" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "PC_aff9BTYpZ5wJO" ] ] ] 6 => array:4 [ "nombre" => "Ünal" "apellidos" => "Şahin" "email" => array:1 [ 0 => "unal.sahin@erdogan.edu.tr" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">a</span>" "identificador" => "PC_aff9BTYpZ5wJO" ] ] ] ] "afiliaciones" => array:2 [ 0 => array:3 [ "entidad" => "Recep Tayyip Erdogan University, Faculty of Medicine, Department of Chest Disease, Rize, Turkey" "etiqueta" => "a" "identificador" => "PC_aff9BTYpZ5wJO" ] 1 => array:3 [ "entidad" => "Recep Tayyip Erdogan University, Faculty of Medicine, Department of Radiology, Rize, Turkey" "etiqueta" => "b" "identificador" => "PC_affq3JxETHRMY" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0001" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1229 "Ancho" => 2833 "Tamanyo" => 279459 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0001" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">(a) The mean attenuation value of a unilateral pleural effusion due to lung adenocarcinoma in axial sections of contrast-enhanced thorax CT of a 63-year-old patient was measured as 16.42 HU. (b) The mean pleural fluid attenuation value of the bilateral pleural effusion of a 60-year-old patient with CHF was measured as 2.28 HU in axial sections of contrast-enhanced thorax CT.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0001" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0008">Introduction</span><p id="para0008" class="elsevierStylePara elsevierViewall">Pleural effusions occur as a result of an imbalance between pleural fluid production and absorption. In clinical practice, they are frequently encountered as a complication of many diseases.<a class="elsevierStyleCrossRef" href="#bib0001"><span class="elsevierStyleSup">1</span></a> Congestive Heart Failure (CHF) is reported to be the most common cause of pleural effusions. Malignant Pleural Effusions (MPE) and Parapneumonic Effusions (PPE) are other common causes.<a class="elsevierStyleCrossRef" href="#bib0001"><span class="elsevierStyleSup">1</span></a> The annual incidence of pleural effusions is as high as 3‒5/1000 cases per year. A definitive diagnosis of the disease, causing pleural effusion is possible after systematic evaluation and many interventional procedures. The first question that needs to be answered for a patient with pleural effusion is whether the fluid is transudative or exudative in nature. Light criteria are often used as an efficacious tool while dealing with pleural effusions. They were defined by Light et al. in 1972 and have high sensitivity and specificity in differentiating transudative and exudative pleural effusions.<a class="elsevierStyleCrossRef" href="#bib0002"><span class="elsevierStyleSup">2</span></a> If thoracentesis shows a transudative pleural fluid based on Light's criteria consistent with clinical as well as radiological findings, no further investigations are required. There are many causes of transudative effusions with CHF, renal failure, hypoalbuminemia, and atelectasis being the primary ones. If exudative fluid is detected by thoracentesis, further investigations are needed to reach the etiological diagnosis. Although thoracentesis is relatively safe, it is an invasive procedure that can cause minor complications such as pain, cough, and subcutaneous hematoma as well as certain major complications such as pneumothorax, hemothorax, and organ injuries.<a class="elsevierStyleCrossRefs" href="#bib0003"><span class="elsevierStyleSup">3-5</span></a> Presently there is a need to develop an efficient and non-invasive method to avoid these complications.</p><p id="para0009" class="elsevierStylePara elsevierViewall">Chest radiography, ultrasonography, and Computed Tomography (CT) are the most commonly used imaging modalities in the diagnostic process of pleural effusions. Thorax computed tomography allows a detailed evaluation of fluid-related features such as the amount of pleural effusion, investigation of pleural nodule and thickening, presence of loculation, and accompanying conditions such as pneumonia and malignancy that can cause pleural effusion.<a class="elsevierStyleCrossRef" href="#bib0006"><span class="elsevierStyleSup">6</span></a> The attenuation values of effusions in Hounsfield Units (HU) are measured on the axial sections of thorax CT. Hounsfield units are a measure of X-Ray attenuation in CT images. The HU value of water is accepted as zero under normal pressure and temperature. The contents of transudative and exudative pleural fluids are different. Therefore, it is expected that there will be a difference in attenuation values that helps to distinguish them from each other. There are a limited number of studies on this subject which were conducted on a small number of patients. In this context, this study aims to investigate the efficacy of attenuation measurements via thorax CT for differentiation of transudative and exudative pleural effusions and to reveal the factors affecting attenuation.</p></span><span id="sec0002" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0009">Materials and methods</span><p id="para0010" class="elsevierStylePara elsevierViewall">The patients over the age of 18, who had pleural effusions in their thorax CT and underwent thoracentesis within two days of pleural effusion diagnosis were included in the study. The data regarding the period between January 2018 and March 2022 were collected retrospectively. Initially, a differentiation was made between transudative and exudative effusions according to Light's criteria by using biochemical markers. Etiological factors were investigated through other diagnostic procedures such as cytopathological and bacteriological examinations as well as echocardiography. Both non-contrast and contrast-enhanced thorax CT images were examined. The cases with undetermined pleural fluid etiology and those with artifacts on CT images that would affect the measurement were excluded from the study.</p><span id="sec0003" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0010">Attenuation measurement in Hounsfield Units (HU) using multislice CT</span><p id="para0011" class="elsevierStylePara elsevierViewall">The CT examinations were performed using a 128 detectors General Electric Discovery CT750 HD CT device. In CT images, the thickness of the pleural fluid was measured using the axial sections with the highest amount of pleural fluid in the posterior-anterior diameter. The measurements were made in HU using the Region Of Interest (ROI) tool. For each area selected, 3 adjacent sections were analyzed per case. The mean of the three measurements was recorded as the attenuation value of the pleural fluid (<a class="elsevierStyleCrossRef" href="#fig0001">Fig. 1</a> a and b). Particular attention was paid not to including the lung, rib and pleural thickening areas during the measurements.</p><elsevierMultimedia ident="fig0001"></elsevierMultimedia></span><span id="sec0004" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0011">Statistical analysis</span><p id="para0012" class="elsevierStylePara elsevierViewall">All statistical analyses were performed using the IBM-SPSS program (SPSS version 21; SPSS Inc., Chicago, IL, USA). Continuous variables were given as mean ± standard deviations and categorical variables were given in percentages (%). The chi-Square test was used to compare categorical variables. The Student-<span class="elsevierStyleItalic">t</span> test was used to compare the two groups. The Pearson correlation analysis method was employed to analyze the relationship between the variables. Independent variables affecting the pleural HU value were determined by linear regression analysis. Receiver Operating Characteristic (ROC) analysis was performed to find the cut-off value at which the specificity and sensitivity for the exudate were optimal. Statistical significance was defined as p < 0.05.</p></span></span><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0012">Results</span><p id="para0013" class="elsevierStylePara elsevierViewall">The study included 380 patients 149 (39 %) women. The mean age of the patients was 69.9 ± 15.2 (20‒107) years. A total of 125 (33 %) pleural effusions were found to be transudates, whereas 255 (67 %) were found to be exudates. The etiologies of transudative fluids were valvular heart diseases for 61 patients, systolic heart failure for 39 patients, atelectasis for 12 patients, hypoalbuminemia for 7 patients and other causes for 6 patients when given in order of frequency. The etiologies of exudative fluids were metastatic malignancies for 158 patients, pneumonia for 60 patients, tuberculosis for 14 patients, and other causes for 23 patients. <a class="elsevierStyleCrossRef" href="#tbl0001">Table 1</a> shows the demographic, radiological and biochemical characteristics of the patients. Attenuation values of exudative fluids were found to be significantly higher than transudative fluids (15.1 ± 5.1 and 5.0 ± 3.4, respectively, p < 0.001). No significant difference was detected between the attenuation values of MPE, PPE and Tuberculous Pleurisy (TP) which are common causes of exudative fluids (14.8 ± 4.9, 15.6 ± 4.9 and 14.4 ± 3.7, respectively, p = 0.398).</p><elsevierMultimedia ident="tbl0001"></elsevierMultimedia><p id="para0014" class="elsevierStylePara elsevierViewall">The attenuation value had a high efficacy in differentiating between the exudative pleural effusions from transudates in the ROC analysis (<a class="elsevierStyleCrossRef" href="#fig0002">Fig. 2</a>).</p><elsevierMultimedia ident="fig0002"></elsevierMultimedia><p id="para0015" class="elsevierStylePara elsevierViewall">Specificity, sensitivity, Positive Predictive Value (PPV) and Negative Predictive Value (NPV) were calculated at different cut-off values to reveal the efficacy of attenuation values in the differentiation of transudates and exudates (<a class="elsevierStyleCrossRef" href="#fig0002">Fig. 2</a>). When the cut-off value was accepted as ≥ 10 HU, exudative fluids were differentiated from transudative fluids with high efficacy (sensitivity: 89.7 %, specificity: 94.4 %, PPV: 97 % and NPV: 81.9 %). It was also possible to differentiate transudative fluids from exudative fluids with high efficacy when the cut-off value was accepted as < 6 HU (sensitivity: 60.8 %, specificity: 97.2 %, PPV: 91.6 % and NPV: 83.4 %<span class="elsevierStyleBold">) (</span><a class="elsevierStyleCrossRef" href="#tbl0002">Table 2</a><span class="elsevierStyleBold">).</span></p><elsevierMultimedia ident="tbl0002"></elsevierMultimedia><p id="para0016" class="elsevierStylePara elsevierViewall">Pearson correlation analysis was performed to determine the relationship between the attenuation values of pleural fluids and other variables. A positive correlation was found between the attenuation values and pleural protein (<span class="elsevierStyleItalic">r</span> = 0.676, p < 0.001), Pleural Lactate Dehydrogenase (LDH) (<span class="elsevierStyleItalic">r</span> = 0.222, p < 0.001), pleural cholesterol (<span class="elsevierStyleItalic">r</span> = 0.653, p < 0.001), pleural hematocrit (<span class="elsevierStyleItalic">r</span> = 0.203, p = 0.001), pleural WBC (<span class="elsevierStyleItalic">r</span> = 0.139, p = 0.010), pleural bilirubin (<span class="elsevierStyleItalic">r</span> = 0.151, p = 0.046) and pleural potassium (<span class="elsevierStyleItalic">r</span> = 0.164, p = 0.033) values. A negative correlation was found between the pleural attenuation and the patient's age (<span class="elsevierStyleItalic">r</span> = -0.244, p < 0.001) and pleural glucose levels (<span class="elsevierStyleItalic">r</span> = -0.279, p < 0.001). There were no significant correlations between the attenuation values and pleural triglyceride (<span class="elsevierStyleItalic">r</span> = 0.054, p = 0.327), pleural sodium (<span class="elsevierStyleItalic">r</span> = -0.041, p = 0.760), and pleural calcium (<span class="elsevierStyleItalic">r</span> = -0.058, p = 0.674) levels. The attenuation values had the strongest correlation with pleural protein and pleural cholesterol levels (<a class="elsevierStyleCrossRef" href="#fig0003">Fig. 3</a>a and b).</p><elsevierMultimedia ident="fig0003"></elsevierMultimedia><p id="para0017" class="elsevierStylePara elsevierViewall">Pleural cholesterol levels and pleural protein levels are detected as independent variables that affect the attenuation value in the linear regression analysis (<a class="elsevierStyleCrossRef" href="#tbl0003">Table 3</a>).</p><elsevierMultimedia ident="tbl0003"></elsevierMultimedia></span><span id="sec0006" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0013">Discussion</span><p id="para0018" class="elsevierStylePara elsevierViewall">This study showed that the attenuation values measured via CT were significantly higher in exudative fluids compared to transudative fluids. In ROC analysis, the attenuation values were highly efficacious in differentiating transudates from exudates (Area Under the Curve [AUC = 0.964], 95 % CI 0.943‒0.985, Standard error = 0.011, p < 0.001). When the cut-off value was accepted as ≥ 10 HU, the exudative effusions could be differentiated from transudative fluids with 94.4 % specificity and 97 % PPV. When the cut-off value for attenuation was accepted as < 6 HU, it was possible to differentiate transudates from exudates with 97.2 % specificity and 91.6 % PPD. In the linear regression analysis, pleural cholesterol and pleural protein levels were found to be independent predictors of attenuation levels. The attenuation measurements were similar in MPE, PPE and TP, which are the most common causes of exudative pleural effusions, and therefore, they could not be used for differentiation.</p><p id="para0019" class="elsevierStylePara elsevierViewall">There are a limited number of studies that evaluate the characterization of pleural fluids and the differentiation between exudates and transudates based on the attenuation measurements of CT images. A retrospective study by Shaili et al., which examined 21 transudatory and 79 exudative cases with pleural effusion reported that the attenuation value of exudative fluids (31.9 ± 15.2 HU) was higher than that of transudative fluids (24.8 ± 9.9 HU, p = 0.047). In this study, the cut-off value for exudative effusions was accepted as ≥ 24.5 HU. The sensitivity and specificity of this cutoff value were 65 % and 47.6 %, respectively, which is considered as a moderate level. Hence, it was not recommended to be used for differentiating exudates from transudates.<a class="elsevierStyleCrossRef" href="#bib0007"><span class="elsevierStyleSup">7</span></a> The study by Yalçın et al. included 128 patients (33 transudates and 95 exudates), and showed that the attenuation values of exudative fluids (8.82‒7.04 HU) were significantly higher than transudative fluids (2.91‒8.53 HU) (p < 0.001). In this study, when the cut-off value was accepted as > 5 HU to differentiate the exudate from the transudate by ROC analysis, sensitivity was found to be 72 %, specificity was 70 %, PPV was 87 % and NPV was 46 %.<a class="elsevierStyleCrossRef" href="#bib0008"><span class="elsevierStyleSup">8</span></a> Nandalur et al. conducted a retrospective study with 145 patients. They reported that the attenuation values of exudative pleural effusions (17.1±4.4 HU) were significantly higher than transudative fluids (12.5 ± 6.3 HU, p = 0.001). They stated that the efficacy of attenuation in differentiating exudative and transudative effusions in ROC analysis was moderate (AUC = 0.775; 95 % CI 0.699‒0.851).<a class="elsevierStyleCrossRef" href="#bib0009"><span class="elsevierStyleSup">9</span></a> Although the attenuation values of the exudative effusions were higher in the three studies described above, none of them suggested the use of CT for attenuation measurement in the differentiation of transudative and exudative pleural effusions. This is because of the moderate specificity and sensitivity and the overlapping attenuation values.</p><p id="para0020" class="elsevierStylePara elsevierViewall">In a study by Ramya et al. the attenuation measurements with CT scan were performed in 80 patients (24 transudates, 56 exudates), and the mean attenuation of exudative fluids (14.65 ± 6.07) was significantly higher than that of transudative fluids (4.66 ± 2.29, p < 0.01). When the CT attenuation cut-off was accepted as < 8 HU, they measured sensitivity as 91.6 %, specificity as 82.7 %, PPV as 73.3 %, and NPV as 96 % for transudative fluids.<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">10</span></a> Sharma et al. reported that pleural fluid attenuation values were significantly higher in exudates (16.5±.7 HU) compared to transudates (11.6 ± 0.57 HU, p = 0.0001).<a class="elsevierStyleCrossRef" href="#bib0011"><span class="elsevierStyleSup">11</span></a> Another study including 106 patients reported that the attenuation of exudative fluids (median: 12.5 [4‒33]) was significantly higher than transudative fluids (median: 5 [2‒15], p < 0.001). When the threshold for exudative effusions was accepted as ≥8.5 HU, the sensitivity and specificity were found to be 85 % and 86.7 %, respectively.<a class="elsevierStyleCrossRef" href="#bib0012"><span class="elsevierStyleSup">12</span></a> These three studies emphasized that the CT attenuation measurements can differentiate between transudates and exudates. The results of this study were in line with the results of these studies.</p><p id="para0021" class="elsevierStylePara elsevierViewall">In a study of dogs, the median attenuation was found 19.22 (8.23‒37.66) HU in exudative fluids and 11.20 (-2.52‒16.59) HU in transudative fluids. The difference was found to be significantly higher in favor of exudative fluids (p < 0.001).<a class="elsevierStyleCrossRef" href="#bib0013"><span class="elsevierStyleSup">13</span></a></p><p id="para0022" class="elsevierStylePara elsevierViewall">Abramowitz et al. conducted a study in which they measured the attenuation of pleural fluids in CT images of 100 patients, 22 of whom were transudates and 78 were exudates. They reported the HU value of the transudates as 10.1 ± 6.9 and as 7.2 ± 9.4 (p = 0.24) for exudates. Correlation analysis revealed a weak but significant positive relationship between the attenuations and the pleural protein levels (<span class="elsevierStyleItalic">r</span> = 0.22, p = 0.003), but no relationship was found between the attenuations and the pleural LDH levels (<span class="elsevierStyleItalic">r</span> = -0.06, p = 0.52). As a result, in this study, it was concluded that the attenuation measurements via thorax CT do not have any potential value in the characterization of pleural fluids.<a class="elsevierStyleCrossRef" href="#bib0014"><span class="elsevierStyleSup">14</span></a></p><p id="para0023" class="elsevierStylePara elsevierViewall">One of the most striking and newly emphasized findings in the present study is the determination of pleural protein and pleural cholesterol levels as factors affecting the attenuation measurements. Attenuation measurement via CT is a density measurement. As the density increases, the attenuation also increases. The authors believe that, as the high molecular weight components of pleural fluid such as albumin, cholesterol, and other proteins, which are generally the most abundant ingredients increase, the attenuation also increases.</p></span><span id="sec0007" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0014">Conclusion</span><p id="para0024" class="elsevierStylePara elsevierViewall">As a result, attenuation measurements via thorax CT can be used to differentiate exudates from transudates. The independent factors affecting the attenuation values are pleural cholesterol and protein levels. Pleural effusions with an attenuation value of ≥10 HU should be considered exudative effusions and necessary further investigations should be performed. The fluids with an attenuation value < 6 HU are quite likely to be transudative. If the clinical and radiological features of a patient are compatible with a transudative effusion, the disease-causing the pleural effusion can be diagnosed and its possible complications can be avoided without thoracentesis. However, there is a need for comprehensive studies on this subject.</p><span id="sec0008" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0015">Ethics approval</span><p id="para0025" class="elsevierStylePara elsevierViewall">The study was approved by the local ethics committee (2021/43).</p></span><span id="sec0009" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0016">Data availability statement</span><p id="para0026" class="elsevierStylePara elsevierViewall">The datasets are available from the corresponding author upon reasonable request.</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0017">Authors’ contributions</span><p id="para0027" class="elsevierStylePara elsevierViewall">Conceptualization: Aziz Gumus, Neslihan Ozcelik.</p><p id="para0028" class="elsevierStylePara elsevierViewall">Data curation: Aziz Gumus, Neslihan Ozcelik, Songul Ozyurt, Nese Merve Guner Zırıh.</p><p id="para0029" class="elsevierStylePara elsevierViewall">Formal analysis: Aziz Gumus, Nur Hursoy.</p><p id="para0030" class="elsevierStylePara elsevierViewall">Investigation: Aziz Gumus, Bilge Yılmaz Kara, Unal Sahin.</p><p id="para0031" class="elsevierStylePara elsevierViewall">Methodology: Aziz Gumus, Neslihan Ozcelik, Songul Ozyurt, Nur Hursoy.</p><p id="para0032" class="elsevierStylePara elsevierViewall">Supervision: Unal Sahin.</p><p id="para0033" class="elsevierStylePara elsevierViewall">Writing-original draft: Aziz Gumus, Neslihan Ozcelik, Songul Ozyurt.</p><p id="para0034" class="elsevierStylePara elsevierViewall">Writing-review & editing: Aziz Gumus, Neslihan Ozcelik, Songul Ozyurt, Bilge Yılmaz Kara.</p><p id="para0035" class="elsevierStylePara elsevierViewall">All authors read and approved the final version of the manuscript.</p></span><span id="sec0011" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0018">Funding</span><p id="para0036" class="elsevierStylePara elsevierViewall">The authors declared that this case has received no financial support.</p></span></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:10 [ 0 => array:3 [ "identificador" => "xres2291105" "titulo" => "Highlights" "secciones" => array:1 [ 0 => array:1 [ "identificador" => "abss0001" ] ] ] 1 => array:3 [ "identificador" => "xres2291106" "titulo" => "Abstract" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abss0002" "titulo" => "Objective" ] 1 => array:2 [ "identificador" => "abss0003" "titulo" => "Materials and methods" ] 2 => array:2 [ "identificador" => "abss0004" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abss0005" "titulo" => "Conclusion" ] ] ] 2 => array:2 [ "identificador" => "xpalclavsec1903410" "titulo" => "Keywords" ] 3 => array:2 [ "identificador" => "sec0001" "titulo" => "Introduction" ] 4 => array:3 [ "identificador" => "sec0002" "titulo" => "Materials and methods" "secciones" => array:2 [ 0 => array:2 [ "identificador" => "sec0003" "titulo" => "Attenuation measurement in Hounsfield Units (HU) using multislice CT" ] 1 => array:2 [ "identificador" => "sec0004" "titulo" => "Statistical analysis" ] ] ] 5 => array:2 [ "identificador" => "sec0005" "titulo" => "Results" ] 6 => array:2 [ "identificador" => "sec0006" "titulo" => "Discussion" ] 7 => array:3 [ "identificador" => "sec0007" "titulo" => "Conclusion" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "sec0008" "titulo" => "Ethics approval" ] 1 => array:2 [ "identificador" => "sec0009" "titulo" => "Data availability statement" ] 2 => array:2 [ "identificador" => "sec0010" "titulo" => "Authors’ contributions" ] 3 => array:2 [ "identificador" => "sec0011" "titulo" => "Funding" ] ] ] 8 => array:2 [ "identificador" => "xack786315" "titulo" => "Acknowledgements" ] 9 => array:1 [ "titulo" => "References" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2024-04-25" "fechaAceptado" => "2024-07-14" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "Keywords" "identificador" => "xpalclavsec1903410" "palabras" => array:5 [ 0 => "Attenuation" 1 => "Exudate" 2 => "Hounsfield Units" 3 => "Pleural effusion" 4 => "Transudate" ] ] ] ] "tieneResumen" => true "highlights" => array:2 [ "titulo" => "Highlights" "resumen" => "<span id="abss0001" class="elsevierStyleSection elsevierViewall"><p id="spara009" class="elsevierStyleSimplePara elsevierViewall"><ul class="elsevierStyleList" id="celist0001"><li class="elsevierStyleListItem" id="celistitem0001"><span class="elsevierStyleLabel">•</span><p id="para0001" class="elsevierStylePara elsevierViewall">Pleural effusion is a common medical problem that occurs as a complication of many diseases.</p></li><li class="elsevierStyleListItem" id="celistitem0002"><span class="elsevierStyleLabel">•</span><p id="para0002" class="elsevierStylePara elsevierViewall">The first thing that needs to be done is to decide whether the pleural fluid, obtained by thoracentesis, is a transudate or an exudate.</p></li><li class="elsevierStyleListItem" id="celistitem0003"><span class="elsevierStyleLabel">•</span><p id="para0003" class="elsevierStylePara elsevierViewall">Attenuation measurements via thorax CT can be used to differentiate exudates from transudates.</p></li></ul></p></span>" ] "resumen" => array:1 [ "en" => array:3 [ "titulo" => "Abstract" "resumen" => "<span id="abss0002" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0003">Objective</span><p id="spara010" class="elsevierStyleSimplePara elsevierViewall">Pleural effusion is a common medical problem. It is important to decide whether the pleural fluid is a transudate or an exudate. This study aims to measure the attenuation values of pleural effusions on thorax computed tomography and to investigate the efficacy of this measurement in the diagnostic separation of transudates and exudates.</p></span> <span id="abss0003" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0004">Materials and methods</span><p id="spara011" class="elsevierStyleSimplePara elsevierViewall">380 cases who underwent thoracentesis and thorax computed tomography with pleural effusion were classified as exudates or transudates based on Light's criteria. Attenuation measurements in Hounsfield units were performed through the examination of thorax computed tomography images.</p></span> <span id="abss0004" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0005">Results</span><p id="spara012" class="elsevierStyleSimplePara elsevierViewall">380 patients were enrolled (39 % women), the mean age was 69.9 ± 15.2 years. 125 (33 %) were transudates whereas 255 (67 %) were exudates. The attenuation values of exudates were significantly higher than transudates (15.1 ± 5.1 and 5.0 ± 3.4) (p < 0.001). When the attenuation cut-off was set at ≥ 10 HU, exudates were differentiated from transudates at high efficiency (sensitivity is 89.7 %, specificity is 94.4 %, PPV is 97 %, NPV is 81.9 %). When the cut-off value was accepted as < 6 HU, transudates were differentiated from exudates with 97.2 % specificity.</p></span> <span id="abss0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cesectitle0006">Conclusion</span><p id="spara013" class="elsevierStyleSimplePara elsevierViewall">The attenuation measurements of pleural fluids can be considered as an efficacious way of differentiating exudative and transudative pleural effusions.</p></span>" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "abss0002" "titulo" => "Objective" ] 1 => array:2 [ "identificador" => "abss0003" "titulo" => "Materials and methods" ] 2 => array:2 [ "identificador" => "abss0004" "titulo" => "Results" ] 3 => array:2 [ "identificador" => "abss0005" "titulo" => "Conclusion" ] ] ] ] "multimedia" => array:6 [ 0 => array:8 [ "identificador" => "fig0001" "etiqueta" => "Fig. 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 1229 "Ancho" => 2833 "Tamanyo" => 279459 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0001" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spara001" class="elsevierStyleSimplePara elsevierViewall">(a) The mean attenuation value of a unilateral pleural effusion due to lung adenocarcinoma in axial sections of contrast-enhanced thorax CT of a 63-year-old patient was measured as 16.42 HU. (b) The mean pleural fluid attenuation value of the bilateral pleural effusion of a 60-year-old patient with CHF was measured as 2.28 HU in axial sections of contrast-enhanced thorax CT.</p>" ] ] 1 => array:8 [ "identificador" => "fig0002" "etiqueta" => "Fig. 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 1315 "Ancho" => 1750 "Tamanyo" => 104537 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0002" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spara002" class="elsevierStyleSimplePara elsevierViewall">ROC analysis of attenuation values (AUC = 0.964, 95 %CI 0.943‒0.985, Standard Error = 0.011, p < 0.001).</p>" ] ] 2 => array:8 [ "identificador" => "fig0003" "etiqueta" => "Fig. 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 1115 "Ancho" => 2500 "Tamanyo" => 188355 ] ] "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0003" "detalle" => "Fig " "rol" => "short" ] ] "descripcion" => array:1 [ "en" => "<p id="spara003" class="elsevierStyleSimplePara elsevierViewall">(a) The scatter plot graph showing the positive correlation between pleural attenuation values and pleural protein values. (b) The scatter plot graph showing the positive correlation between pleural attenuation values and pleural cholesterol values.</p>" ] ] 3 => array:8 [ "identificador" => "tbl0001" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0004" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:2 [ "leyenda" => "<p id="spara005" class="elsevierStyleSimplePara elsevierViewall">mm, milimeter; HU, Hounsfield Unit; LDH, Lactate Dehydrogenase.</p><p id="spara006" class="elsevierStyleSimplePara elsevierViewall">Data are given as mean ± standard deviation and/or minimum‒maximum.</p>" "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0001"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0002"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Transudative effusion</span><span class="elsevierStyleBold">(n</span> = <span class="elsevierStyleBold">125)</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0003"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Exudative effusion</span><span class="elsevierStyleBold">(n</span> = <span class="elsevierStyleBold">255)</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0004"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">p-value</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0005"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Age (years)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0006"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">77.7 ± 11.1 (46‒97) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0007"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">66.4 ± 15.5 (20‒95) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0008"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0009"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Gender (female/male)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0010"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">49/76 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0011"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">99/156 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0012"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.954 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0013"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Effusion size (mm)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0014"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">54 ± 22 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0015"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">65 ± 28 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0016"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.018 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0017"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Attenuation (HU)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0018"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">5.0 ± 3.4 (-5‒15.5) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0019"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">15.1 ± 5.1 (2‒36) \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0020"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0021"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural protein (gr/L)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0022"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">22.2 ± 5.9 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0023"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">44.7 ± 9.7 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0024"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0025"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural albumin (gr/L)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0026"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">12.2 ± 3.6 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0027"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">25.0 ± 6.1 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0028"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0029"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural LDH</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0030"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">113 ± 72 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0031"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">681 ± 385 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0032"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0033"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural cholesterol (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0034"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">30 ± 13 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0035"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">92 ± 32 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0036"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0037"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural triglyceride (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0038"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">18 ± 9 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0039"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">45 ± 17 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0040"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.009 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0041"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural leukocyte</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0042"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">542 ± 185 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0043"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">3544 ± 1880 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0044"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0045"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural hematocrit (%)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0046"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.94 ± 0.14 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0047"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1.29 ± 1.64 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0048"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.010 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0049"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural glucose (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0050"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">160 ± 69 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0051"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">108 ± 57 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0052"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0053"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural potassium (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0054"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">3.6 ± 0.6 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0055"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">3.7 ± 0.5 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0056"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.634 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0057"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural sodium (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0058"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">136 ± 7 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0059"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">135 ± 7 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0060"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.782 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0061"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural calcium (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0062"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">4.4 ± 0.2 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0063"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">4.5 ± 0.6 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0064"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t">0.700 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0065"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural bilirubin (mg/dL)</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0066"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.47 ± 0.30 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0067"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1.27 ± 0.96 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0068"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="\n \t\t\t\t\ttop\n \t\t\t\t"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3711837.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara004" class="elsevierStyleSimplePara elsevierViewall">Demographic, radiological, and biochemical characteristics of patients with transudative and exudative pleural fluids.</p>" ] ] 4 => array:8 [ "identificador" => "tbl0002" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0005" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0069"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Cut-off value</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0070"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Sensitivity %</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0071"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Specificity %</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0072"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">PPD %</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0073"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">NPD %</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0074"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">≥ 6 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0075"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">97.2 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0076"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">60.8 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0077"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">83.4 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0078"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">91.6 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0079"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">≥ 8 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0080"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">93.2 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0081"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">88.8 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0082"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">94.4 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0083"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">86.7 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0084"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">≥ 10 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0085"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">89.7 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0086"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">94.4 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0087"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">97.0 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0088"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">81.9 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0089"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">≥ 12 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0090"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">79.4 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0091"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">96 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0092"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">97.6 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0093"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">69.8 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3711836.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara007" class="elsevierStyleSimplePara elsevierViewall">The efficacy of different attenuation levels of pleural fluid in differentiating between exudates and transudates.</p>" ] ] 5 => array:8 [ "identificador" => "tbl0003" "etiqueta" => "Table 3" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "detalles" => array:1 [ 0 => array:3 [ "identificador" => "alt0006" "detalle" => "Table " "rol" => "short" ] ] "tabla" => array:1 [ "tablatextoimagen" => array:1 [ 0 => array:2 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><a name="en0094"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0095"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_colgroup " colspan="2" align="center" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Unstandardized coefficients</span></th><a name="en0096"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col"><span class="elsevierStyleBold">Standardized coefficients</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0097"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col"><span class="elsevierStyleBold"><span class="elsevierStyleItalic">t</span></span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0098"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col"><span class="elsevierStyleBold">p-value</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr><tr title="table-row"><a name="en0094a1"></a><th class="td-with-role" title="\n \t\t\t\t\ttable-head\n \t\t\t\t ; entry_with_role_rowgroup " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0100"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">B</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0101"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Std. Error</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0102"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleBold">Beta</span> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0097a"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th><a name="en0098a"></a><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"> \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><a name="en0105"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Constant \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0106"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">−6.553 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0107"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">4.114 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0108"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top"> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0109"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">−1.593 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0110"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.114 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0111"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Age \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0112"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.030 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0113"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.029 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0114"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.076 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0115"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1.030 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0116"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.305 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0117"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Pleural glucose \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0118"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.002 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0119"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.009 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0120"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.017 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0121"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.211 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0122"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.833 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0123"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural protein</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0124"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.156 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0125"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.060 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0126"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.352 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0127"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">2.620 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0128"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top"><span class="elsevierStyleBold">0.010</span> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0129"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top"><span class="elsevierStyleBold">Pleural cholesterol</span> \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0130"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.063 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0131"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.020 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0132"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.418 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0133"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">3.138 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0134"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top"><span class="elsevierStyleBold">0.002</span> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0135"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Pleural hematocrit \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0136"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.912 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0137"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1.289 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0138"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.057 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0139"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.707 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0140"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.481 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0141"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Pleural potassium \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0142"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1.208 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0143"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.736 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0144"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.115 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0145"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">1.641 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0146"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.104 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0147"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Pleural bilirubin \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0148"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">−0.395 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0149"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.437 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0150"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">−0.072 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0151"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">−0.905 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0152"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.368 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><a name="en0153"></a><td class="td-with-role" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t ; entry_with_role_rowhead " align="" valign="top">Pleural leukocyte \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0154"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">−0.006 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0155"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top"><0.001 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0156"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.005 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0157"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.065 \t\t\t\t\t\t\n \t\t\t\t</td><a name="en0158"></a><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="" valign="top">0.949 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] "imagenFichero" => array:1 [ 0 => "xTab3711835.png" ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara008" class="elsevierStyleSimplePara elsevierViewall">The variables affecting the pleural attenuation value by linear regression analyses.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec1" "bibliografiaReferencia" => array:14 [ 0 => array:3 [ "identificador" => "bib0001" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Pleural effusions" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:1 [ 0 => "RW. 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