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The impact of loneliness on mental and physical health outcomes: An umbrella review
El impacto de la soledad en los resultados de salud mental y física: una revisión paraguas
V. Gasull-Molineraa, K.S. Khanb,c, M. Núñez Núñezc,d, M. Kouitib,e,
Corresponding author
m.kouiti@uhp.ac.ma

Corresponding author.
a Primary Health Care Center “Torrent”, Torrent 2, Valencia, Spain
b Universidad de Granada, Departamento de Medicina Preventiva y Salud Pública, Granada, Spain
c Consorcio Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Spain
d Biosanitary Research Institute (Ibs. Granada), 18012 Granada, Spain
e Laboratory of Health Sciences and Technologies, Higher Institute of Health Sciences, Hassan First University of Settat, Settat 26000, Morocco
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">This has been concern that loneliness&#44; a feeling of isolation that can be real or perceived&#44;<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">1</span></a> has been increasing in prevalence among the elderly and adolescents&#46; Awareness was raised during the COVID-19 pandemic when conditions such as living alone&#44; psychiatric disorders and conditions limiting communication were recognized as risk factors&#46;<a class="elsevierStyleCrossRefs" href="#bib0165"><span class="elsevierStyleSup">2&#8211;4</span></a> This relationship between factors and loneliness can be bidirectional&#44; influencing each other negatively&#46;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Although it may not seem at first sight&#44; but on giving it a little thought&#44; loneliness is a public health problem&#46; Scientific evidence has suggested its association with negative physical health such as cardiovascular diseases&#44;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">5</span></a> chronic pain and obesity&#46;<a class="elsevierStyleCrossRefs" href="#bib0160"><span class="elsevierStyleSup">1&#44;6</span></a> A constellation of psychiatric and psychosocial dysfunctions has also been associated with loneliness including depression&#44; anxiety disorders&#44; suicidal thoughts&#44; schizophrenia and bipolar disorder&#46;<a class="elsevierStyleCrossRefs" href="#bib0165"><span class="elsevierStyleSup">2&#44;6</span></a> Stress too is a factor&#44; affecting the nervous system leading to negative physical and mental health outcomes&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">7</span></a> A sedentary lifestyle characterized by poor diet&#44; high tobacco and alcohol consumption are considered part of this problem&#46;<a class="elsevierStyleCrossRefs" href="#bib0195"><span class="elsevierStyleSup">8&#8211;11</span></a> In this umbrella review we aimed to collate and grade evidence analyzing loneliness as health risk factor&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Methods</span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Study protocol</span><p id="par0015" class="elsevierStylePara elsevierViewall">This umbrella was undertaken according to the protocol prospectively registered on the Open Registries Network &#40;<a href="https://doi.org/10.17605/OSF.IO/UW4V8">https&#58;&#47;&#47;doi&#46;org&#47;10&#46;17605&#47;OSF&#46;IO&#47;UW4V8</a>&#41; and reported following the reporting guidelines for overviews of reviews &#40;PRIOR&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">12</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Searches and selection of reviews</span><p id="par0020" class="elsevierStylePara elsevierViewall">The search question was addressed according to PECOS statement &#40;<span class="elsevierStyleBold">P</span>opulation&#58; General Population&#44; <span class="elsevierStyleBold">E</span>xposure&#58; Perceived and objective loneliness&#44; <span class="elsevierStyleBold">C</span>omparison&#58; People living in company&#44; <span class="elsevierStyleBold">O</span>utcome&#58; Physical and mental health condition&#44; <span class="elsevierStyleBold">S</span>tudy design&#58; Umbrella review&#41;&#46; A systematic search will be done on Pubmed&#44; Embase&#44; Scopus&#44; Web of Sciences&#44; PsycINFO and Cochrane Library until august 2023&#46; Key terms were combined as follow&#58; &#40;Loneliness OR &#8220;social isolation&#8221;&#41; AND &#40;&#8220;Health status&#8221; OR &#8220;health conditions&#8221; OR &#8220;health outcomes&#8221; OR &#8220;well-being&#8221;&#41; AND &#40;&#8220;Systematic review&#8221; OR meta-analysis&#41; and the search strategy was adapted to the characteristics of each database and no filters were used&#46; Systematic reviews and meta-analysis assessing the association between loneliness or similar construct and health conditions and published from inception until august 2023 will be defined by two reviewers independently&#46; A first screening will be done by title and abstract&#46; Then&#44; the full text of potentially eligible records will be assessed&#46; A third reviewer will be consulted in case of doubt or discrepancies&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Quality assessment&#44; data extraction and data synthesis</span><p id="par0025" class="elsevierStylePara elsevierViewall">From each included systematic review and meta-analysis&#44; the following information will be extracted&#58; author and publication year&#44; selection criteria&#44; number of original studies included&#44; population under investigation&#44; participants included in the meta-analysis&#44; exposure measurement&#44; outcome measurement&#44; risk estimates with 95&#37; confidence interval&#44; quality assessment tools used for original studies&#46; The risk of bias of included records will be assessed in pairs using AMSTAR-2 scale&#46; AMSTAR-2 includes a total of sixteen domains&#46; Seven domains are considered as critical&#46; Not meeting these criteria will have a more significant impact on the methodological quality of the reviews&#46; The quality will be classified as&#58; critically low&#44; low&#44; moderate and high according to AMSTAR-2 predefined cut off point&#46;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">13</span></a> Meta-analysis results will be summarized on tables and forest plots&#46; Comparison will be done on a narrative way addressing the epidemiology of loneliness on health status&#46;</p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Results</span><p id="par0030" class="elsevierStylePara elsevierViewall">The search yielded total of 1684 records and duplicates were eliminated &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>828&#41;&#46; A first screening was conducted by title and abstract and full text of potential eligible records were assessed&#46; Then&#44; a total of five records was excluded as three did not meet study design criteria<a class="elsevierStyleCrossRefs" href="#bib0225"><span class="elsevierStyleSup">14&#8211;16</span></a> and two do not measure the suitable exposure&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">17&#44;18</span></a> Finally&#44; 13 systematic reviews were selected for data extraction and synthesis &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; Four included meta-analysis&#46;<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">19&#8211;22</span></a> The exposure was measured under different aspects&#46; Loneliness was explored in four systematic reviews as a single concept&#46;<a class="elsevierStyleCrossRefs" href="#bib0260"><span class="elsevierStyleSup">21&#44;23&#8211;25</span></a> Five systematic reviews analyze loneliness together with social isolation&#46; Moreover&#44; others similar instruct was analyzed &#40;adult attachment&#44; living alone and social relationship&#41;&#46; Different instruments were considered for the exposure measurement except in the review of Park et al&#46;&#44; that include only studies using the UCLA scale&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">21</span></a> The association between loneliness and similar constructs was frequently correlated with well-being&#44; cardiovascular disease and cognition&#46; However&#44; only two systematic reviews analyzed for the outcome mortality<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">22</span></a> and one oral health outcome&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">26</span></a> The characteristics of included systematic reviews are provided in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Risk of bias among included reviews</span><p id="par0035" class="elsevierStylePara elsevierViewall">Based on the quality assessment tool AMSTAR-2&#44;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">13</span></a> most of the included systematic reviews show a critically low &#40;76&#46;92&#37;&#44; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#41; and low quality &#40;23&#46;08&#37;&#44; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3&#41;&#46; Weaknesses in systematic reviews were meanly related to the following&#58; item 7&#44; excluded studies not listed and justified in 84&#46;61&#37; &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#41;&#59; item 10&#44; the financial support of included studies not reported in 84&#46;61&#37; &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#41;&#59; and item 13&#44; bias risk not considered or interpreted in 53&#46;85&#37; &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>7&#41;&#46; Results related to each domain are shown in <a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Association of loneliness with adverse health outcomes</span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Mental health and well being</span><p id="par0040" class="elsevierStylePara elsevierViewall">Loneliness and similar constructs were associated to negative mental health in four studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0250"><span class="elsevierStyleSup">19&#44;21&#44;23&#44;27</span></a> Poor well-being&#44; the risk of anxiety&#44; depression and suicidality was highly affected by loneliness&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">21</span></a> In individuals living alone the risk of depression increase by 42&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">20</span></a> During the pandemic period of COVID-19&#44; the level of well-being was low in children and adolescent with high level of loneliness&#46; This situation increases the severity of anxiety and depression in children and adolescent with pre-existing mental health&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">23&#44;28</span></a> Loneliness was also associated with depression in older persons living in congregate&#46; However&#44; few studies relate it to suicidal ideation&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">24</span></a> Others related constructs such adult&#39;s attachment was also positively associated to mental health such as depression and anxiety&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">19</span></a> Inversely&#44; mental health can be improved by a great social health&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">27</span></a></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Physical health</span><p id="par0045" class="elsevierStylePara elsevierViewall">Physical health outcomes analyzed was heterogenous&#46; Only one systematic review analyzes the association between loneliness level and oral health&#46; Evidence was not strong to suggest a possible association&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">26</span></a> No effect was observed on health state utility value&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">29</span></a> Other constructs such living status and partner status do not seem to affect physical and mental health&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">27</span></a> Contrary&#44; the review of Petitte et al&#46;&#44; suggests a possible association between loneliness and similar constructs with physical health outcomes especially chronic conditions such as heart diseases&#44; diabetes and obesity&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">25</span></a> On the other hand&#44; social relationships were associated with better cognitive functions in elderly people&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">30</span></a> The quality of sleep was also affected by social isolation and loneliness in older adults&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">31</span></a></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Mortality</span><p id="par0050" class="elsevierStylePara elsevierViewall">The number of systematic reviews analyzing mortality outcome was very limited &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2&#41;&#46; Social isolation&#44; loneliness and living alone would increase this risk of mortality by 29&#37;&#44; 26&#37;&#44; and 32&#37; respectively&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">22</span></a> However&#44; results related to specific population such elderly people living in congregate care settings was mixed and no clear association was identified&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">24</span></a></p></span></span></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Discussion</span><p id="par0055" class="elsevierStylePara elsevierViewall">Available scientific evidence stressed the role of loneliness and similar constructs in increasing the risk of several health outcomes such as chronic diseases&#44; negative mental health and well-being&#46; The association of loneliness was most important in mental health and moderately so in other health outcomes such as well-being&#44; physical health and sleep&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">21</span></a> The magnitude of association can be different according to the population characteristic&#46; For example&#44; cognition was more likely to be affected by loneliness in men&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">21</span></a> Regarding mortality and oral health&#44; evidence was limited and the association was not clear&#46; The magnitude of association may vary depending on study design &#40;cross-sectional or longitudinal&#41;&#46; Other factors should be considered in interpretation such as the health condition before the outcome occurrence and the presence of associated risk factors&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Only one study considered difference between objective and subjective social isolation and loneliness&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">31</span></a> Social health can be assessed under different aspects such as social isolation&#44; social support and loneliness&#46; Partner status and living status does not seem to reflect social isolation and social support in cardiac patients&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">27</span></a> Therefore&#44; it may not adequately the association with health outcomes&#46; Our fundings can be limited by the low number and quality of systematic reviews retrieved for each outcome&#46; The available systematic reviews were carried out on different populations&#44; so it was not always possible to compare the results with each other in the best way&#46; Moreover&#44; different methods were used for the exposure measurement&#46; In this umbrella&#44; the overlapping of evidence between reviews was not estimated as the number of systematic reviews including the same loneliness construct and health outcome was very limited&#46; Strengths of this umbrella lie in the interest in an under-researched topic&#44; and we demonstrate that it has a major impact on the health status&#46; Moreover&#44; this umbrella is reported according to PRIOR checklist<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">12</span></a> and use an exhaustive search equation including six databases&#46;</p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Conclusion</span><p id="par0065" class="elsevierStylePara elsevierViewall">Most constructs of loneliness seem to be related to mental and physical conditions&#46; Although the evidence was not sufficient to confirm causal association&#44; a preventive strategy must be recommended&#44; especially for vulnerable populations&#46;</p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Ethical considerations</span><p id="par0070" class="elsevierStylePara elsevierViewall">This study was considered exempt from ethical review as it was a literature review of previously published studies&#46;</p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Funding</span><p id="par0075" class="elsevierStylePara elsevierViewall">No specific funding was received for this study&#46;</p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Conflicts of interest</span><p id="par0080" class="elsevierStylePara elsevierViewall">None to declare&#46;</p></span></span>"
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                  "titulo" => "Mental health and well being"
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    "fechaRecibido" => "2024-01-24"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Loneliness and related constructs associated with isolation are public health problems with increasing prevalence&#46; The aim of this umbrella was to collate and grade evidence analyzing actual and subjective loneliness as a health risk factor&#46;</p><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Following prospective registration&#44; a systematic search was conducted in Pubmed&#44; Embase&#44; Scopus&#44; Web of Sciences&#44; psycoINFO and Cochrane Library until August 2023&#46; Systematic reviews assessing the association between actual and subjective loneliness with adverse health outcomes were selected&#46; Risk of bias was evaluated using AMSTAR-2 tool&#46; Data were tabulated and synthesis was narrative&#46;</p><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A total of 13 systematic reviews was selected &#40;four included meta-analysis&#41;&#46; The methodological quality was critically low in 10 reviews &#40;76&#46;92&#37;&#41; and low in 3 &#40;23&#46;08&#37;&#41;&#46; Results showed that loneliness was related to poor well-being and increase the risk of negative mental and physical health&#46; The available data suggested but did not allow the confirmation of a causal association&#46;</p><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Most constructs of loneliness seem to be related to mental and physical health conditions&#46; A preventive strategy ought to be recommended&#44; especially for vulnerable populations&#46;</p></span>"
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        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">La soledad&#44; as&#237; como sus constructos relacionados asociados al aislamiento son problemas de salud p&#250;blica con una prevalencia creciente&#46; El objetivo de esta revisi&#243;n paraguas fue cotejar y clasificar la evidencia cient&#237;fica que analiza la soledad objetiva y subjetiva como factor de riesgo para la salud&#46;</p><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Tras un registro prospectivo&#44; se realiz&#243; una b&#250;squeda sistem&#225;tica en PubMed&#44; Embase&#44; Scopus&#44; Web of Sciences&#44; psycoINFO y Cochrane Library hasta agosto de 2023&#46; Se seleccionaron las revisiones sistem&#225;ticas que evaluaban la asociaci&#243;n entre la soledad objetiva y subjetiva con resultados adversos en la salud&#46; El riesgo de sesgo se evalu&#243; mediante la herramienta AMSTAR-2&#46; Los datos se tabularon y la s&#237;ntesis fue narrativa&#46;</p><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se seleccion&#243; un total de 13 revisiones sistem&#225;ticas &#40;cuatro inclu&#237;an metaan&#225;lisis&#41;&#46; La calidad metodol&#243;gica fue cr&#237;ticamente baja en 10 revisiones &#40;76&#44;92&#37;&#41; y baja en tres &#40;23&#44;08&#37;&#41;&#46; Los resultados mostraron que la soledad estaba relacionada con un bienestar deficiente y peor salud mental y f&#237;sica&#46; Los datos disponibles suger&#237;an&#44; pero no permit&#237;an confirmar una asociaci&#243;n causal&#46;</p><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">La mayor&#237;a de los constructos de la soledad parecen estar relacionados con las condiciones de salud mental y f&#237;sica&#46; Deber&#237;a recomendarse una estrategia preventiva&#44; especialmente para las poblaciones vulnerables&#46;</p></span>"
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">1st author&#44; year&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Last search&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Inclusion criteria&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Databases&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">N of original studies&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Population&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Exposure&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Outcome&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">AMSTAR 2&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Farrell et al&#46;&#44; 2023&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">June 2022&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">English Peer reviews original publications&#44; conducted on Covid 19&#44; age between 0 and 20&#46;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">MEDLINE&#44; Embase&#44; PsycInfo&#44; Web of Science&#44; ERIC&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">41 &#40;cross-sectional&#58; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>30&#59; longitudinal&#58; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Children and adolescent&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Loneliness during COVID 19 pandemic&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Indicators of well being&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Azizi et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">December 2020&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">All observational studies&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">PubMed&#44; Web of Science&#44; Scopus&#44; Embase&#44; Psy-cInfo&#44; and Social care online databases&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">11 &#40;cross-sectional&#58; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>6&#59; longitudinal&#58; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">People aged over 60 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Social isolation and loneliness&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Low sleep quality&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lages et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">April 2020&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Observational studies and clinical trials&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">PubMed&#47;MEDLINE&#44; Web of Science&#44; Scopus&#44; Cochrane Library electronic&#44; SciELO&#44; Science Direct and Embase&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4 &#40;one RCT and three cross-sectional studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Housebound people aged 18 years or older&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Social isolation&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Oral health status&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Zhang et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">November 2019&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Studies including both positive and negative indicators of mental health&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Pubmed&#44; PsycINFO&#44; ProQuest data- bases &#40;ProQuest Central and ProQuest Digital Dissertations&#41;&#44; web of science&#44; and Google&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">224&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">All population&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Adult attachment&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Mental health&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Majmudar et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">April 2021&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">English peer-reviewed publication in all quantitative study design &#40;observational and experimental&#41;&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Medline Complete&#44; PsycINFO&#44; Embase&#44; CINAHL and EconLit&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">All population and age groups with pre-existing health conditions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Loneliness and social isolation&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Health state utility values&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wu et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">May 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Randomized controlled trials or cohort studies including effect estimate &#40;odds ratio with 95&#37; CI Confidence Interval&#41;&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Pubmed&#44; Embase&#44; and Cochrane&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Seven studies &#40;six cohort studies and one case&#8211;control study&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Participants who did not have depression&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Living alone&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">The risk of depression&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Hards et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">March 2020&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">English peer-reviewed publication of primary search &#40;age<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>20 years&#41;&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">MEDLINE&#44; PsycINFO&#44; and Web of Science&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 studies &#40;case&#8211;control design&#58; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#59; Cohorts&#58; <span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#41;&#46; follow-up of cohorts&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Children and adolescent with pre-existing mental health conditions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Social isolation and loneliness&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Mental health problems&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lapane et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">August 2021&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Qualitative and quantitative studies published in English&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">CINAHL&#44; Scopus&#44; PsycINFO&#44; MEDLINE&#44; and Cochrane Re- views&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">31 &#40;5 qualitative&#44; 3 mixed method&#44; 19 cross-sectional&#44; and 4 cohort&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Older adults living in congregate care settings&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Loneliness&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Health outcome&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Freak Poli et al&#46;&#44; 2022&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">June 2020&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cross-sectional and longitudinal observational data including People residing in Australia and New Zealand&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Embase&#44; MEDLINE&#44; Scopus&#44; Web of Science&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">39&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">All ages who had experienced a CVD event and recruited from a clinical location&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Social isolation&#44; social support and loneliness&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Health and well-being after a cardiovascular disease event&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Park et al&#46;&#44; 2020&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">April 2019&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Studies assessing subjective loneliness using UCLA scale&#46; Related constructs &#40;e&#46;g&#46;&#44; social isolation&#44; social support&#41; was excluded&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Medline&#47;Pubmed&#44; Embase&#44;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">114&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">All age groups&#44; sexes&#44; ethnicities&#44; and nationalities&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Loneliness&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Distinct health outcomes &#40;Mental health&#44; general health&#44; well-being&#44; sleep and cognition&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Kelly et al&#46;&#44; 2017&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">January 2017&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Observational and RCTs studies&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">PubMed&#44; Medline and PsycInfo&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">39 &#40;3 RCTs&#44; 34 observational studies and two genetic studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Community dwelling older adults &#40;&#62; 50 years&#41; with no known cognitive impairment&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Subjective social relationship&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cognitive function&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Petitte et al&#46;&#44; 2015&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Quantitative studies of adults written in English&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">CINAHL&#44; ERIC&#44; MEDLINE&#44; PsycARTICLES&#44; and PsycINFO&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">36 articles&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#8211;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Loneliness&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Chronic conditions &#40;heart disease&#44; hypertension&#44; stroke&#44; lung disease and metabolic disorder&#41;&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Holt-Lunstad et al&#46;&#44; 2015&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">February 2014&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Prospective studies published in English&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">MEDLINE&#44; CINAHL&#44; PsycINFO&#44; Social Work Abstracts&#44; and Google Scholar&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Loneliness&#44; social isolation or living along&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Mortality&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Critically low&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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      "titulo" => "References"
      "seccion" => array:1 [
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          "identificador" => "bibs0015"
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                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Loneliness&#58; loneliness&#58; clinical import and interventions"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "S&#46; Cacioppo"
                            1 => "A&#46;J&#46; Grippo"
                            2 => "S&#46; London"
                            3 => "L&#46; Goossens"
                            4 => "J&#46;T&#46; Cacioppo"
                          ]
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                    0 => array:2 [
                      "doi" => "10.1177/1745691615570616"
                      "Revista" => array:6 [
                        "tituloSerie" => "Perspect Psychol Sci"
                        "fecha" => "2015"
                        "volumen" => "10"
                        "paginaInicial" => "238"
                        "paginaFinal" => "249"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/25866548"
                            "web" => "Medline"
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              "identificador" => "bib0165"
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Effects of objective and perceived social isolation on cardiovascular and brain health&#58; a scientific statement from the American Heart Association"
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                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "C&#46;W&#46; Cen&#233;"
                            1 => "T&#46;M&#46; Beckie"
                            2 => "M&#46; Sims"
                            3 => "S&#46;F&#46; Suglia"
                            4 => "B&#46; Aggarwal"
                            5 => "N&#46; Moise"
                          ]
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                    0 => array:1 [
                      "Revista" => array:4 [
                        "tituloSerie" => "J Am Heart Assoc"
                        "fecha" => "2022"
                        "volumen" => "11"
                        "paginaInicial" => "3"
                      ]
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              ]
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                0 => array:2 [
                  "contribucion" => array:1 [
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                      "titulo" => "Loneliness and health&#58; potential mechanisms"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "J&#46;T&#46; Cacioppo"
                            1 => "L&#46;C&#46; Hawkley"
                            2 => "L&#46;E&#46; Crawford"
                            3 => "J&#46;M&#46; Ernst"
                            4 => "M&#46;H&#46; Burleson"
                            5 => "R&#46;B&#46; Kowalewski"
                          ]
                        ]
                      ]
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                    0 => array:2 [
                      "doi" => "10.1097/00006842-200205000-00005"
                      "Revista" => array:6 [
                        "tituloSerie" => "Psychosom Med"
                        "fecha" => "2002"
                        "volumen" => "64"
                        "paginaInicial" => "407"
                        "paginaFinal" => "417"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/12021415"
                            "web" => "Medline"
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                ]
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            3 => array:3 [
              "identificador" => "bib0175"
              "etiqueta" => "4"
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                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Understanding loneliness during adolescence&#58; developmental changes that increase the risk of perceived social isolation"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "B&#46; Laursen"
                            1 => "A&#46;C&#46; Hartl"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.adolescence.2013.06.003"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Adolesc"
                        "fecha" => "2013"
                        "volumen" => "36"
                        "paginaInicial" => "1261"
                        "paginaFinal" => "1268"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23866959"
                            "web" => "Medline"
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                      ]
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                ]
              ]
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            4 => array:3 [
              "identificador" => "bib0180"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "An overview of systematic reviews on the public health consequences of social isolation and loneliness"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "N&#46; Leigh-Hunt"
                            1 => "D&#46; Bagguley"
                            2 => "K&#46; Bash"
                            3 => "V&#46; Turner"
                            4 => "S&#46; Turnbull"
                            5 => "N&#46; Valtorta"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.puhe.2017.07.035"
                      "Revista" => array:6 [
                        "tituloSerie" => "Public Health"
                        "fecha" => "2017"
                        "volumen" => "152"
                        "paginaInicial" => "157"
                        "paginaFinal" => "171"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/28915435"
                            "web" => "Medline"
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                      ]
                    ]
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                ]
              ]
            ]
            5 => array:3 [
              "identificador" => "bib0185"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Associations between loneliness and perceived social support and outcomes of mental health problems&#58; a systematic review"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "J&#46; Wang"
                            1 => "F&#46; Mann"
                            2 => "B&#46; Lloyd-Evans"
                            3 => "R&#46; Ma"
                            4 => "S&#46; Johnson"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1186/s12888-018-1736-5"
                      "Revista" => array:5 [
                        "tituloSerie" => "BMC Psychiatry"
                        "fecha" => "2018"
                        "volumen" => "18"
                        "paginaInicial" => "156"
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ISSN: 11383593
Original language: English
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