en <span style=font-size:11pt><span style=text-justify:inter-ideograph><span style=line-height:normal><span style=font-family:Calibri,sans-serif><b><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4f81bd>Aims:</span></span></span></b><span style=font-size:10.0pt><span cambria= style=font-family:> Loneliness encompasses a range of emotions stemming from unmet personal and interpersonal needs, often arising from social isolation, a prevalent issue among older individuals. Existing research findings remain inconclusive regarding the precise relationship between loneliness, social isolation, and sleep patterns among the elderly. The present review aimed to explore the interconnection between loneliness, social isolation, and sleep.</span></span></span></span></span></span><br> <span style=font-size:11pt><span style=text-justify:inter-ideograph><span style=line-height:normal><span style=font-family:Calibri,sans-serif><b><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4f81bd>Information & Methods:</span></span></span></b><span style=font-size:10.0pt><span cambria= style=font-family:> This review was conducted following the PRISMA 2020 guidelines. The literature search covered databases, such as PubMed, Wiley Online Library, ScienceDirect, and ProQuest. The initial keywords were loneliness, social isolation, sleep, and elderly or older adults. These keywords were further expanded and refined using Medical Subject Headings provided by the National Center for Biotechnology Information.</span></span></span></span></span></span><br> <span style=font-size:11pt><span style=text-justify:inter-ideograph><span style=line-height:normal><span style=font-family:Calibri,sans-serif><b><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4f81bd>Findings:</span></span></span></b><span style=font-size:10.0pt><span cambria= style=font-family:> A systematic online search revealed 13,418 publications. Out of these, 88 articles did not meet the inclusion criteria during the full-text screening phase, leaving only 13 articles eligible for in-depth analysis. The results indicated a strong interconnection between loneliness and social isolation.</span></span></span></span></span></span><br> <span style=font-size:11pt><span style=text-justify:inter-ideograph><span style=line-height:normal><span style=font-family:Calibri,sans-serif><b><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4f81bd>Conclusion:</span></span></span></b><span style=font-size:10.0pt><span cambria= style=font-family:> Feelings of loneliness and social isolation are associated with reduced sleep quality among the elderly.</span></span></span></span></span></span> Loneliness,Social Isolation,Sleep,Elderly, 197 205 http://hehp.modares.ac.ir/browse.php?a_code=A-10-79982-1&slc_lang=en&sid=4