OBJECTIVE: Loneliness and social isolation are associated with adverse health outcomes, especially within the elderly population, underlining the need for effective interventions. This systematic review and meta-analysis aims to summarize all available evidence regarding the effectiveness of interventions for loneliness and social isolation, to map out their working mechanisms, and to give implications for policy and practice.
METHODS: Systematic literature review and meta-analysis.
METHODS: Older adults (≥65 years).
METHODS: A systematic search was conducted in MEDLINE, PsycINFO, and CINAHL for studies quantitively or qualitatively assessing effects of interventions for loneliness and social isolation in older adults, following predefined selection criteria. Risk of bias as well as small study effects were assessed and, wherever appropriate, information about effect sizes of individual studies pooled using random-effects meta-analyses. Sources for between-study heterogeneity were explored using meta-regression.
RESULTS: Of n = 2223 identified articles, n = 67 were eventually included for narrative synthesis. Significant intervention effects were reported for a proportion of studies (55.9% and 50.0% for loneliness and social isolation, respectively) and 57.6% of studies including a follow-up measure (n = 29) reported sustained intervention effects. Meta-analysis of n = 27 studies, representing n = 1756 participants, suggested a medium overall effect of loneliness interventions (d = -0.47; 95% CI, -0.62 to -0.32). Between-study heterogeneity was substantial and could not be explained by differences in study design, year of publication, outcome measures, intervention length, participant demographics, setting, baseline level of loneliness, or geographic location. However, non-technology-based interventions reported larger effect sizes on average (Δd = -0.35; 95% CI, -0.66 to -0.04; P = .029) and were more often significant. Qualitative assessment of potential intervention mechanisms resulted in 3 clusters of effective components: \"promoting social contact,\" \"transferring knowledge and skills,\" and \"addressing social cognition\".
CONCLUSIONS: Interventions for loneliness and social isolation can generally be effective, although some unexplained between-study heterogeneity remains. Further research is needed regarding the applicability of interventions across different settings and countries, also considering their cost-effectiveness.

Communication is considered as one of the basic human needs. For a long time, loneliness and social isolation were mainly considered as a psychosocial problem. However, in the recent years, there has been increasing evidence of the possible impact of loneliness and social isolation on the development and clinical course of somatic diseases. Research objectives were studying and analysis of current literature data about the medical consequences of loneliness and social isolation in the elderly cases. An analysis of the literature data shows that loneliness and social isolation affect not only the psycho-emotional status of elderly patients, but also their physical health. It has been shown that the number of available social connections affects the development and clinical course of diabetes mellitus, cardiovascular diseases, and outcomes of the brain stroke, immune system reactions, average life expectancy, and the risk of death caused by any causes. It has been established that the influence of social ties on the risk and clinical course of chronic non-communicable diseases is comparable to the effect of such generally accepted risk factors like smoking, alcohol consumption, physical inactivity, hypertension, obesity, hypercholesterolemia, environmental pollution, as well as various medical interventions (vaccination, drug therapy, etc.). Social isolation affects the risk of hospitalization and the frequency of outpatient care, poor socialization increases the risk of death from a heart attack. The results of the study show that loneliness and social isolation of the elderly cases have certain medical consequences that need to be taken into account when managing such patients.
Общение считается одной из базовых потребностей человека. Долгое время одиночество и социальная изоляция считались преимущественно психосоциальной проблемой. Однако в последние годы появляется все больше свидетельств о возможном влиянии одиночества и социальной изоляции на развитие и клиническое течение соматических заболеваний. Цель работы — изучение современных данных литературы о медицинских последствиях одиночества и социальной изоляции у лиц пожилого возраста. Анализ данных показал, что одиночество и социальная изоляция влияют не только на психоэмоциональный статус пожилых пациентов, но и на состояние физического здоровья. Показано, что количество имеющихся социальных связей влияет на развитие и течение сахарного диабета, болезней сердца и сосудов, исходы инсульта мозга, реакции иммунной системы, среднюю продолжительность жизни, риск смерти, вызванной любыми причинами. Установлено, что уменьшение объема социальных связей влияет на риск возникновения и течение хронических неинфекционных заболеваний, что сопоставимо с действием таких общепризнанных факторов риска, как курение, употребление алкогольных напитков, гиподинамия, артериальная гипертензия, ожирение, гиперхолестеринемия, загрязнение окружающей среды, а также различные медицинские вмешательства (вакцинация, медикаментозная терапия и т. п.). Социальная изоляция влияет на риск госпитализации и частоту обращений за амбулаторной помощью, плохая социализация увеличивает риск смерти от сердечного приступа. Результаты исследования показывают, что одиночество и социальная изоляция пожилых пациентов имеют определенные медицинские последствия, которые нужно учитывать при ведении данной категории лиц.

OBJECTIVE: To clarify the mechanisms of interventions addressing loneliness and social isolation in older adults living in nursing homes through the involvement of primary and secondary informal caregivers.
METHODS: This scoping review was performed by two independent reviewers, covering the period between 2011 and 2022 and the databases MEDLINE, CINAHL, PsycINFO and Scopus. It included terms related to (A) informal caregivers, (B) nursing homes, (C) psychosocial interventions, (D) involvement and (E) social isolation or loneliness.
RESULTS: Thirty-three studies met the inclusion criteria. Although there were various definitions and assessment tools related to social isolation and loneliness, the studies referred to three dimensions of these concepts in nursing home residents: the quantity of social interactions, the perception of these encounters and biographical changes in social relationships. Most studies did not explicate the mechanisms of these interventions. The review uncovered the following aspects of intervention mechanisms: increasing opportunities for social contact, creating meaningful encounters, maintaining existing relationships with primary informal caregivers and establishing new ones with secondary informal caregivers.
CONCLUSIONS: Studies reporting on interventions addressing loneliness and social isolation in nursing home residents need to clarify and detail their intervention mechanisms in order to foster more targeted interventions. In addition, there is a need for further research on large-scale programs or care philosophies in this field and the development of intervention designs, which allow for tailored intervention formats in order to respond to the individual perception of social relationships.

Background: According to the World Health Organization, social isolation, particularly of older adults, is a public health issue endangering the well-being of individuals, families, and communities. Social isolation affects health through biological, behavioral, and psychological pathways and is associated with physical and psychological/emotional well-being, increases morbidity and mortality rates, and lowers quality of life. Purpose: This systematic review examined the relationship between social isolation and physical health, including subjective and objective dimensions, and factors that influence this relationship in adults. Methods: This systematic review examined six electronic databases covering the field of health and human services and included results from 1 January 2017 to 10 March 2023 with key terms including adult social connection or social isolation coupled with health, physical, psychological, emotional, mental, or behavioral. The initial search yielded 925 research articles across all databases and was narrowed to 710 when the decision was made to focus on social isolation and physical health. Covidence was used throughout the retrieval and appraisal process, as provided in a PRISMA flow diagram. Twenty-four studies that scored 90 or above in the appraisal process were included in the systematic review. Results: The studies represented included seven studies conducted in the United States and seventeen studies conducted internationally. Regarding study design, twenty-three studies were quantitative, one was qualitative, and one was mixed methods. The majority of quantitative studies were correlational in design with nine being longitudinal. The majority of studies were based on large national data sets representing in total 298,653 participants aged 50 and older. The results indicate that social isolation is related to increases in inflammatory biomarkers associated with diseases, all-cause mortality, lower expectations of longevity, and frailty. In addition, social isolation was associated with cognitive decline and disruptions in sleep. Poor oral health increased social isolation. The results further indicated that decreased physical performance/function and a decline in physical activity were associated with social isolation, as well as decreased overall physical health, poor health behaviors, and self-care, and decreased health-related quality of life. Further research is warranted to examine the possible bidirectionality of these relationships and possible mediating, moderating, or confounding variables. Implications: Future research is needed to explore the biological and behavioral pathways in which social isolation negatively impacts physical health. Going forward, studies are needed that move beyond descriptive, exploratory methods and integrate data from qualitative and mixed-method designs that will inform the development and testing of a conceptual framework related to social isolation and health. By advancing the science behind social isolation, comprehensive interventions can be identified and tested with implications at the individual, family, community, and societal levels to reduce social isolation, particularly among adults, and improve health and quality of life.

BACKGROUND: The impact of social frailty on older adults is profound including mortality risk, functional decline, falls, and disability. However, effective strategies that respond to the needs of socially frail older adults are lacking and few studies have unpacked how social determinants operate or how interventions can be adapted during periods requiring social distancing and isolation such as the COVID-19 pandemic. To address these gaps, we conducted a scoping review using JBI methodology to identify interventions that have the best potential to help socially frail older adults (age ≥65 years).
METHODS: We searched MEDLINE, CINAHL (EPSCO), EMBASE and COVID-19 databases and the grey literature. Eligibility criteria were developed using the PICOS framework. Our results were summarized descriptively according to study, patient, intervention and outcome characteristics. Data synthesis involved charting and categorizing identified interventions using a social frailty framework.  RESULTS: Of 263 included studies, we identified 495 interventions involving ~124,498 older adults who were mostly female. The largest proportion of older adults (40.5%) had a mean age range of 70-79 years. The 495 interventions were spread across four social frailty domains: social resource (40%), self-management (32%), social behavioural activity (28%), and general resource (0.4%). Of these, 189 interventions were effective for improving loneliness, social and health and wellbeing outcomes across psychological self-management, self-management education, leisure activity, physical activity, Information Communication Technology and socially assistive robot interventions. Sixty-three interventions were identified as feasible to be adapted during infectious disease outbreaks (e.g., COVID-19, flu) to help socially frail older adults.
CONCLUSIONS: Our scoping review identified promising interventions with the best potential to help older adults living with social frailty.

Data on the association between social isolation, loneliness, and risk of incident coronary heart disease (CVD) are conflicting. The objective of this study is to determine the relationship between social isolation and loneliness, and the risk of developing cardiovascular disease (CVD) in middle age and elderly using meta-analysis. The purpose of the bibliometric analysis is to systematically evaluate the existing literature on the relationship between social isolation, loneliness, and the risk of developing cardiovascular disease (CVD) in middle-aged and elderly individuals. A comprehensive search through four electronic databases (MEDLINE, Google Scholar, Scopus, and Web of Science) was conducted for published articles that determined the association between social isolation and/or loneliness and the risk of developing coronary heart disease from June 2015 to May 2023. Two independent reviewers reviewed the titles and abstracts of the records. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guideline to conduct the systematic review and meta-analysis. Data for the bibliometric analysis was obtained from the Scopus database and analyzed using VOSviewer and Bibliometrix applications. Six studies involving 104,511 patients were included in the final qualitative review and meta-analysis after screening the records. The prevalence of loneliness ranged from 5 to 65.3%, and social isolation ranged from 2 to 56.5%. A total of 5073 cardiovascular events were recorded after follow-up, ranging between 4 and 13 years. Poor social relationships were associated with a 16% increase in the risk of incident CVD (Hazard Ratio of new CVD when comparing high versus low loneliness or social isolation was 1.16 (95% Confidence Interval (CI) 1.10-1.22). The bibliometric analysis shows a rapidly growing field (9.77% annual growth) with common collaboration (6.37 co-authors/document, 26.53% international). The US leads research output, followed by the UK and Australia. Top institutions include University College London, Inserm, and the University of Glasgow. Research focuses on \"elderly,\" \"cardiovascular disease,\" and \"psychosocial stress,\" with recent trends in \"mental health,\" \"social determinants,\" and \"COVID-19\". Social isolation and loneliness increase the risk of and worsen outcomes in incident cardiovascular diseases. However, the observed effect estimate is small, and this may be attributable to residual confounding from incomplete measurement of potentially confounding or mediating factors. The results of the bibliometric analysis highlight the multidimensional nature of CVD research, covering factors such as social, psychological, and environmental determinants, as well as their interplay with various demographic and health-related variables.

(1) Background: Social isolation, which has numerous adverse effects on health status, is prevalent among cancer patients. This review proposes to identify the influencing factors of social isolation among cancer patients. (2) Methods: Articles published in English or Chinese from six electronic databases before December 2023 were identified via a systematic search. A manual search was also performed. (3) Results: Twenty-eight studies were identified in this systematic review. The factors associated with social isolation can be summarized into the following categories: demographic characteristics, having cancer, health status, coping, social support and social interaction. Despite the heterogeneity, 20 factors were significantly associated with social isolation, including age, gender, comorbidity burden, education level, residence, medical insurance, occupation status, personality, race, smoking status, having children, not living alone, household income level, marital status, the role of primary caregiver, physical health status, mental health status, social health status, coping styles, and the level of social support and social interaction. (4) Conclusions: The systematic review showed that cancer patients\' social isolation was influenced by their demographic characteristics, cancer-related factors, physical condition, psychological status, social health status, coping styles, and level of social support and social interaction. In addition, future group intervention could be considered to improve social isolation.

Social isolation has become a global issue among the elderly, posing serious challenges to both social and public health. We assessed the prevalence of elderly social isolation and its related factors. Eight electronic databases were searched up to June 28th, 2023. A meta-analysis of the included literature was performed using Stata 16.0. The results showed that the incidence of social isolation in the elderly was 33 % [95 % CI (0.28, 0.38)]. The subgroup analysis revealed that people over 80, with a sample size under 500, assessed using the Lubben Social Network scale and Social Network Index scale, experienced higher social isolation, especially if they were living alone and lacked higher education. It is suggested to pay attention to the psychological well-being of elderly individuals living alone and lacking a high level of education. Early screening could help reduce the incidence of social isolation, and hence its implications, among the elderly.

BACKGROUND: Homebound older adults (HOAs) are particularly vulnerable to social isolation and loneliness, which engender a poorer physical and mental health, and greater cognitive decline. The purpose of this review is to map the literature to identify potential technological strategies that reduce social isolation in HOAs, and to understand facilitators and barriers for adoption and implementation.
METHODS: Six databases including PubMed (MEDLINE), Google Scholar, Cochrane Database, EBSCOHost, National Library ProQuest, Web of Science, and the Journal of Medical Internet Research were searched for relevant articles. Peer-reviewed literature published in English from Jan 2014 to Feb 2024 that employed technological strategies applicable to HOAs and assessed social isolation or connectedness as an outcome measure were included.
RESULTS: 107 studies were reviewed and classified into different technological categories based on their functions and features. A social technology framework encompassing delivery, hardware, software, content, training, and support was conceptualized with core characteristics identified from the reviewed technological strategies. Cost and complexity of technology, and resource commitment were identified as barriers while user-friendliness, content curation and a supportive ecosystem may facilitate the adoption of a technological strategy to address social isolation in HOAs.
CONCLUSIONS: There is a need for early and concerted effort to identify HOAs, provide technology training, and empower them to tap on the digital world to complement and/or supplement social interactions. Development of cost-effective and rapid-to-implement technology is vital for HOAs who are at highest risk to social isolation.

BACKGROUND: Social isolation is associated with increased all-cause and premature mortality, poor chronic disease management, and mental health concerns. Limited research exists on interventions addressing social isolation among individuals under 65 despite its increasing prevalence among young and middle-aged adults.
OBJECTIVE: To identify interventions from the extant literature that address social isolation and loneliness in ambulatory healthcare settings in adults aged 18-64, and to identify elements of successful studies for future intervention design.
METHODS: Systematic review of interventions targeting social isolation in community-dwelling adults aged 18-64 within ambulatory healthcare settings.
METHODS: A search strategy was developed to identify relevant articles in the following databases: Ovid MEDLINE, Embase, EBM Reviews, Scopus, CINAHL and PsychInfo. Data were extracted on study design and setting, intervention type, outcome related to social isolation/loneliness and scale of measure used.
RESULTS: 25,078 citations were identified and underwent title and abstract screening. 75 articles met our inclusion criteria and were synthesised, including an assessment of bias. Effective interventions were delivered in community health settings, incorporated a group component, and used digital technologies. They also addressed the association between mental health and social isolation using CBT approaches and enhanced self-management and coping strategies for chronic conditions through psycho-educational interventions.
CONCLUSIONS: Future research should prioritise adults living in low- and middle-income countries, racialized individuals, as well as those with fewer educational opportunities. There is also a need to advance research in primary care settings, where longitudinal patient-provider relationships would facilitate the success of interventions.