Loneliness Among Older Adults in Latin America, China, and India: Prevalence, Correlates and Association With Mortality

Loneliness, social isolation, and living alone: a comprehensive systematic review, meta-analysis, and meta-regression of mortality risks in older adults

Loneliness, social isolation, and living alone are significant risk factors for mortality, particularly in older adults. This systematic review and meta-analysis aimed to quantify their associations with all-cause and cause-specific mortality in older adults, broadening previous research by including more social factors. Comprehensive searches were conducted in PubMed, APA PsycINFO, and CINAHL until December 31, 2023, following PRISMA 2020 and MOOSE guidelines. Studies included were prospective cohort or longitudinal studies examining the relationship between loneliness, social isolation, living alone, and mortality. Quality was assessed using the Newcastle-Ottawa Scale. Meta-analyses used random-effects models with the Restricted Maximum Likelihood method. Subgroup and meta-regression analyses explored the relationships further. Of 11,964 identified studies, 86 met the inclusion criteria. Loneliness was associated with increased all-cause mortality (HR 1.14, 95% CI 1.10-1.18), with substantial heterogeneity (I² = 84.0%). Similar associations were found for social isolation (HR 1.35, 95% CI 1.27-1.43) and living alone (HR 1.21, 95% CI 1.13-1.30). Subgroup analyses revealed variations based on factors like sex, age, region, chronic diseases, and study quality. Meta-regression identified longer follow-up, female sex, validated social network indices, adjustments for cognitive function, and study quality as significant predictors of mortality risks. These findings highlight the need for public health interventions to address these social factors and improve health outcomes in older adults. However, further research is needed due to variability and heterogeneity across studies. Also studying the cumulative effect of these factors on mortality risks will be of considerable interest.

Overview of the prevalence of loneliness and associated risk factors among older adults across six continents: A meta-analysis

BACKGROUND

Globally, loneliness is a growing public health concern associated with poor mental and physical health among older adults. Therefore, we performed a meta-analysis to explore the prevalence of loneliness and associated risk factors among older adults across six continents.

METHODS

Web of Science, PubMed, Embase, CINAHL, Cochrane Library, and references lists were comprehensively searched until April 2024. Data analysis was performed using Logit Transformation model in R-Software for pooled prevalence and DerSimonian-Lard random-effects model in Comprehensive Meta-Analysis for associated factors of loneliness. Heterogeneity was quantified by I2 and τ2 statistics. The funnel plot and Egger's regression test assessed publication bias.

RESULTS

A total of 70 studies with 462,083 older adults were included. The pooled prevalence of loneliness was 26 % (95 %CI, 23 %-30 %) with 38 % for North America, 34 % for Africa, 32 % for Asia and South America, 23 % for Europe, and 13 % for Oceania. Cognitive impairment (2.98; 95 %CI, 1.30-6.81), poor health (2.35; 95 %CI, 1.59-3.45), female (1.92; 95 %CI, 1.53-2.41), depression (1.74; 95 %CI, 1.40-2.16), widowed (1.67; 95 %CI, 1.13-2.48), single (1.51; 95 %CI, 1.06-2.17), institutionalization (2.95; 95 %CI, 1.48-5.88), rural residency (1.18; 95 %CI, 1.04-1.34) were associated with increased risk of loneliness. Being married (0.51; 95 %CI, 0.31-0.82), male (0.55; 95 %CI, 0.43-0.70), and non-institutionalization (0.34; 95 %CI, 0.17-0.68) were associated with lower risk of loneliness.

CONCLUSION

Approximately, three among ten older adults aged ≥ 60 years are lonely worldwide. Early detection, prevention, and management of loneliness among older adults should consider diverse needs using gender-specific approaches.

Toward a National Profile of Loneliness in Old-Age China: Prevalence and Lonely Life Expectancy

OBJECTIVES

Loneliness presents a significant challenge for many older adults in China. Understanding the national scale and patterns of loneliness is critical to inform and guide policy interventions. This study builds a national profile of loneliness among Chinese adults aged 55 and above, illustrating the prevalence of loneliness and the average years expected to feel lonely, and examining how these measures vary by urban/rural residence and gender.

METHODS

This study uses the China Health and Retirement Longitudinal Study (2011-2018, N = 25,563) to estimate the loneliness prevalence across different gender and urban/rural residences. Drawing on Sullivan's method for calculating Healthy Life Expectancy, the author estimate the Lonely Life Expectancy (LLE), which quantifies the expected years an individual will live with loneliness.

RESULTS

Approximately 30% of older Chinese aged 55 and above reported experiencing loneliness during 2011-2018. At age 55, Chinese adults anticipate spending about 7-10 years feeling lonely, representing over one-third of their remaining lifespan. By age 75, this proportion may increase to more than half. Estimates of prevalence and LLE exhibit marked disparities with respect to gender and urban/rural residency. Rural women emerged as the most disadvantaged, facing the highest prevalence and largest proportion of remaining lifetime feeling lonely.

DISCUSSION

Older adults in China spend a significant proportion of their remaining lives feeling lonely. Marked disparities in LLEs underscore the potential role of loneliness in perpetuating health inequalities across different gender and urban/rural residences. These results highlight the urgent need for targeted interventions to mitigate the consequences of prolonged loneliness.

A network analysis on the relationship between depression symptoms and loneliness in elderly Peruvians

Loneliness and depression are the most prevalent mental health issues among older adults, and their relationship has been documented in studies using reflective psychopathological models based on the total scores. However, mental health problems should be investigated at the level of individual symptoms in order to develop intervention strategies aimed at mitigating the adverse impact of both variables. The goal was to examine the extent to which symptoms of loneliness relate to symptoms of depression in elderly Peruvians using the network method in 328 Peruvian adults with an average age of 68.44 years (SD = 7.64). The participants were selected through non-probability convenience sampling, which may limit the generalizability of the results. The Patient Health Questionnaire-2 (PHQ-2) and three-item UCLA Loneliness Scale were used in this study. Network analysis was used to identify central and bridging symptoms within the network of loneliness and depressive symptoms. Furthermore, the invariance in symptom networks between men and women was estimated. The results indicated that 'feeling excluded' was the most central symptom. Furthermore, the symptoms 'feeling excluded' and 'anhedonia' have the strongest relationship and can be considered as bridge symptoms between loneliness and depressive disorders. Symptom networks were invariant between men and women (M = .26; p = .42; S = .09; p = .38). In conclusion, the network structure provides valuable insights into the relationship between the symptoms of loneliness and depression in older Peruvian adults. The results suggest that the symptoms 'feeling excluded' and 'anhedonia' could serve as potential targets for psychological interventions aimed at efficiently reducing loneliness and depression.

Longitudinal associations between loneliness, social isolation, and healthcare utilisation trajectories: a latent growth curve analysis

PURPOSE

To explore the longitudinal associations between eight-year trajectories of loneliness, social isolation and healthcare utilisation (i.e. inpatient, outpatient, and nursing home care) in US older adults.

METHODS

The study used data from the Health and Retirement Study in 2006-2018, which included a nationally representative sample of American adults aged 50 and above (N = 6,832). We conducted latent growth curve models to assess the associations between trajectories of loneliness and isolation and healthcare utilisation over 8 years.

RESULTS

Independent of sociodemographic and health-related confounders, social deficits were associated with a lower likelihood of baseline physician visits (loneliness β= -0.15, SE = 0.08; social isolation β= -0.19, SE = 0.08), but there was a positive association between loneliness and number of physician visits (β = 0.06, SE = 0.03), while social isolation was associated with extended hospital (β = 0.07, SE = 0.04) and nursing home stays (β = 0.05, SE = 0.02). Longer nursing home stays also predicted better trajectories of loneliness and isolation over time.

CONCLUSION

Loneliness and social isolation are cross-sectionally related to complex patterns of different types of healthcare. There was no clear evidence that social deficits led to specific trajectories of healthcare utilisation, but nursing home stays may over time help provide social contact, supporting trajectories of isolation and potentially loneliness. Non-clinical services such as social prescribing could have the potential to address unmet social needs and further promote patients' health-seeking profiles for improving healthcare equity.

Loneliness prevalence of community-dwelling older adults and the impact of the mode of measurement, data collection, and country: A systematic review and meta-analysis

OBJECTIVES

The aim of this systematic review and meta-analysis is to assess the prevalence of loneliness in many countries worldwide which have different ways of assessing it.

DESIGN

Systematic review and meta-analysis.

SETTING

We searched seven electronic databases for English peer-reviewed studies published between 1992 and 2021.

PARTICIPANTS

We selected English-language peer-reviewed articles, with data from non-clinical populations of community-dwelling older adults (>60 years), and with "loneliness" or "lonely" in the title.

MEASUREMENTS

A multilevel random-effects meta-analysis was used to estimate the prevalence of loneliness across studies and to pool prevalence rates for different measurement instruments, data collection methods, and countries.

RESULTS

Our initial search identified 2,021 studies of which 45 (k = 101 prevalence rates) were included in the final meta-analysis. The estimated pooled prevalence rate was 31.6% (n = 168,473). Measurement instrument was a statistically significant moderator of the overall prevalence of loneliness. Loneliness prevalence was lowest for single-item questions and highest for the 20-item University of California-Los Angeles Loneliness Scale. Also, differences between modes of data collection were significant: the loneliness prevalence was significantly the highest for face-to-face data collection and the lowest for telephone and CATI data collection. Our moderator analysis to look at the country effect indicated that four of the six dimensions of Hofstede also caused a significant increase (Power Distance Index, Uncertainty Avoidance Index, Indulgence) or decrease (Individualism) in loneliness prevalence.

CONCLUSIONS

This study suggests that there is high variability in loneliness prevalence rates among community-dwelling older adults, influenced by measurement instrument used, mode of data collection, and country.

Elder Abuse and Depressive Symptoms: The Mediating Role of Loneliness in Older Adults

BACKGROUND

Elder abuse (EA), depressive symptoms, and loneliness represent a growing risk to the health, well-being, and premature mortality of older adults. However, the role of loneliness in the relationship between EA and depressive symptoms has not yet been examined.

AIMS

To investigate the associations between these constructs and to explore the possible mediating role of loneliness in the relationship between EA and depressive symptoms in a representative sample of older Mexican people.

METHODS

A representative community-dwelling survey of older adults aged 60 and older was conducted in two cities in Mexico (Mexico City and Xalapa) in 2018-2019. Measurements of EA, loneliness, depressive symptoms, health, and sociodemographic data were collected. Regression and mediation models were tested to analyze the associations between these variables.

RESULTS

The prevalence of EA was 16.3%, loneliness was 50%, and depressive symptoms were 25.5%. The odds ratio (OR) for the occurrence of depressive symptoms was 2.7 when the combined effects of EA and loneliness were considered. The proportion of the effect that could explain the mediating role of loneliness was 31%.

CONCLUSION

To effectively reduce depressive symptoms in older individuals affected by emotional or psychological abuse and neglect, it is crucial to address both the mediating influence of loneliness and EA itself in therapeutic and preventive interventions.

Pilot trial protocol: community intervention to improve depressive symptoms among Peruvian older adults

BACKGROUND

Non-pharmacological interventions have proven effective at alleviating depression and anxiety symptoms in older adults. Methodological refinement and testing of these interventions in new contexts are needed on a small scale before their effectiveness and implementation can be evaluated. The purpose of this pilot study is to assess the feasibility of a future large-scale trial comparing an adapted mental health multi-component evidence-based intervention (VIDACTIVA) versus standard care for older adults experiencing depression symptoms in urban, resource-limited settings in Lima, Peru. Furthermore, this study will explore the acceptability, feasibility, and fidelity of implementing the intervention.

METHODS

We will conduct an open-label, mixed methods pilot feasibility study with two parallel groups. A total of 64 older adults, stratified by sex, will be randomized at a 1:1 ratio to either the "intervention" or "control." Participants will be followed for 22 weeks after enrollment. Those in the intervention group will receive eight VIDACTIVA sessions administered by community health workers (CHWs) over 14 weeks, with an additional eight weeks of follow-up. Participants in the control group will receive two psychoeducation sessions from a study fieldworker and will be directed to health care centers. Standard care does not involve CHWs. We will evaluate screening rates, recruitment strategies, retention rates, the acceptability of randomization, and assessments. Additionally, we will assess preliminary implementation outcomes-acceptability, feasibility, and fidelity-from the perspectives of CHWs (interventionists), older adults (main participants), older adults' relatives, and healthcare professionals.

DISCUSSION

If the findings from this feasibility trial are favorable, a fully powered randomized controlled trial will be conducted to evaluate `both the effectiveness and implementation of the intervention. This research will make a substantial contribution to the field of mental health in older adults, particularly by emphasizing a meticulous examination and documentation of the implementation process. By doing so, this study will offer valuable methodologies and metrics for adapting and assessing mental health interventions tailored to the unique needs of older adults in resource-constrained contexts and diverse cultural settings.

TRIAL REGISTRATION

The current trial registration number is NCT06065020, which was registered on 26th September 2023.

The reciprocal associations between social deficits, social engagement, and inflammation: Longitudinal evidence comparing venous blood samples and dried blood spots and mapping the modifying role of phenotypic and genotypic depression

BACKGROUND

Social psychoneuroimmunology suggests an interplay between social deficits (loneliness and isolation) and chronic inflammation, but the direction of these relationships remains unclear. We estimated the reciprocal associations of social deficits and social engagement with levels of C-reactive protein (CRP), compared the consistency of the findings depending on the biological sampling method used, and examined the modifying role of phenotypic and genotypic depression.

METHODS

We used longitudinal nationally representative data from the US (Health and Retirement Study, 3 waves, 2006-16) and England (English Longitudinal Study of Ageing, 4 waves, 2004-18). Loneliness, social isolation, and social engagement were self-reported. CRP was measured using dried blood spots (US) and venous blood samples (England). Cross-lagged panel models were fitted and tested interactions with phenotypic depression (above-threshold depressive symptom scores) and genotypic depression (polygenic score for major depressive disorder).

RESULTS

We included 15,066 participants (mean age = 66.1 years, SD = 9.8) in the US and 10,290 (66.9 years, SD = 10.5) in England. We found reciprocal associations between loneliness and CRP using dried blood spots and venous blood samples. Higher CRP predicted higher subsequent loneliness and higher loneliness predicted elevated CRP. Both phenotypic and genotypic depression modified this reciprocal association. There were also reciprocal associations for social engagement in venous blood samples: higher CRP predicted lower social engagement and greater social engagement predicted lower subsequent CRP. Associations between social isolation and CRP were inconsistent and unidirectional.

CONCLUSIONS

Loneliness may increase chronic inflammation, whereas social engagement may reduce inflammation. As these relationships were reciprocal, there may be a loop between inflammation, loneliness, and social engagement. This loop was stronger in those with depression or at high genetic risk for major depressive disorder. This relationship for loneliness was present in both blood sampling methods despite contrasting methods of CRP measurement, indicating that the finding is not attributable to measurement bias in biomarkers.

Longitudinal associations of loneliness and social isolation with care dependence among older adults in Latin America and China: A 10/66 dementia research group population-based cohort study

OBJECTIVES

With increasing life expectancy and rapid ageing, there is an expanding number of older people who have functional declines, greater needs for care and support and who are at increased risk of insufficient social interaction. Longitudinal investigations on the interplay between loneliness, social isolation and care dependence remain limited. This study thus aimed to investigate the longitudinal reciprocal association between social isolation/loneliness and care dependence among older adults in Latin America and China.

METHODS

We analysed data from the population-based cohorts from the 10/66 Dementia Research Group (DRG) project (baseline 2003-07 and follow-up 2007-2010). The 10/66 DRG study recruited and followed up older adults aged 65 years or above in 11 catchment areas in Latin America and China. A total of 15,027 older adults from Latin America and China (mean age = 73.5, standard deviation = 6.5) were included in our analyses. Cross-lagged panel models were used to investigate potential reciprocal associations.

RESULTS

Loneliness was positively associated with care dependence at baseline (β = 0.11, p < 0.001 in Latin America; β = 0.16, p < 0.05 in China]. Social isolation consistently had a stronger positive association with care dependence across all study sites in both waves. Longitudinally, care dependence positively predicted loneliness (β = 0.10, p < 0.001) and social isolation (β = 0.05, p < 0.001) in Latin American study sites but not in China. Yet there was no statistical evidence of lagged effects of loneliness and social isolation on care dependence in all study countries.

CONCLUSIONS

Older people with care dependence are at risk of developing loneliness and social isolation. It is crucial to develop complex care models using a societal approach to address social and care needs holistically, especially for the older group with declining functional capacity. Future longitudinal research is required to explore the causal mechanisms of relationships and cultural differences, in order to inform the development of culturally appropriate care models.

The S20 Brazilian Mental Health Report for building a just world and a sustainable planet: Part I

This is the first part of two documents prepared by experts for the Brazilian S20 mental health report. These reports outline strategies aimed at addressing the exacerbated mental health challenges arising from a post-pandemic world. Ongoing psychiatric epidemiology research has yielded evidence linking mental health with intricate social determinants, including gender, race/ethnicity, racism, socioeconomic status, social deprivation, and employment, among others. More recently, the focus has expanded to also encompass violence and social oppression. By prioritizing prevention and early intervention, harnessing technology, and fostering community support, we can mitigate the long-term impact of mental disorders emerging in life. Utilizing evidence-based practices and forging partnerships between the health and education sectors, S20 countries can promote health and safety of their student population, thereby paving the way for a more promising future for the next generations. The first document focuses on addressing the mental health concerns of vulnerable populations, catering to the needs of children, youth, and aging populations, assessing the current state of alcohol and drug addictions, scaling up psychosocial interventions in primary care, exploring the potential integration of health and educational systems, and emphasizing the imperative adoption of human rights in mental health policies.

An exploratory study on material deprivation and loneliness among older adults in Hong Kong

BACKGROUND

Poverty, as a risk factor for loneliness, has been understudied, and there is a need to gain a better understanding of the relationship between poverty examined by material deprivation and loneliness among older adults in Hong Kong. It also aimed to explore the possible mediation and moderation effects of social support, social networks, neighborhood collective efficacy, and social engagement in the link between material deprivation and loneliness.

METHODS

1696 Chinese older adults aged 60 years and above (Mage = 74.61; SD = 8.71) participated in a two-wave study. Older adults reported their loneliness level, material deprivation, perceived level of social support, social network, neighborhood collective efficacy, social engagement, and sociodemographic information. Logistic regression was conducted to examine the effect of material deprivation on loneliness, as well as the mediation and moderation models.

RESULTS

The results indicated that material deprived older adults reported a significantly higher level of loneliness 2 years later when controlling for demographic variables, health-related factors, and loneliness at baseline. We also found that engagement in cultural activities partially mediated the effect of material deprivation and loneliness. Furthermore, neighborhood collective efficacy and engagement in cultural activities were significant moderators that buffer the relationship between material deprivation and loneliness.

CONCLUSIONS

Our results suggested the need to alleviate the negative impact of material deprivation on loneliness by developing interventions focused on promoting neighborhood collective efficacy and social engagement, which could be aimed at building meaningful bonds among Chinese older adults in Hong Kong.

Exploring the impact of information and communication technologies on loneliness and social isolation in community-dwelling older adults: a scoping review of reviews

BACKGROUND

Recognizing the escalating public health concerns of loneliness and social isolation in aging populations, this study seeks to comprehensively explore the potential of information and communication technology (ICT)-based interventions to address these issues among older adults. This scoping review of reviews aims to map and synthesize existing evidence on the effectiveness and scope of ICT interventions targeting loneliness and social isolation in community-dwelling older adults, elucidating types of technology, impacts, facilitators, barriers, and research gaps.

METHODS

Following the Joanna Briggs Institute framework, we systematically searched eight diverse databases identifying relevant published reviews. We included English-written, peer-reviewed reviews of all types, with no limits regarding time of publication about ICTs targeting loneliness and/or social isolation for community-dwelling older adults. Eligible reviews were analysed and summarized, offering a holistic narrative of the reported types of ICTs and their impact, the identified facilitators and barriers influencing the implementation and adoption of ICT interventions, and the research gaps identified in the literature.

RESULTS

The review included 39 publications published between 2012 and 2024, spanning systematic, scoping, and reviews of reviews. Various ICTs were reported, primarily social media virtual communities, followed by video-mediated friendly visits, conversational agents, social robots, exergames and online gameplay. Predominantly positive impacts on mitigating social isolation and loneliness were evident for these ICTs, although methodological diversity and contradictory findings complicated definite conclusions. Facilitators and barriers encompassed individual competencies, access and usage, and intervention design and implementation. Research gaps involved targeting specific subgroups, exploring innovative technologies, incorporating diverse study designs, improving research methodologies, and addressing usability and accessibility. Future research should focus on identifying elderly individuals who can benefit the most from ICT use, exploring novel technologies, using a wider range of study designs, and enhancing usability and accessibility considerations.

CONCLUSIONS

This review sheds light on the diverse range of ICTs, their impact, and the facilitators and barriers associated with their use. Future investigations should prioritize refining outcome measures, addressing gender differences, and enhancing the usability and accessibility of interventions. The involvement of older adults in the design process and the exploration of technological training interventions hold promise in overcoming barriers.

Experiences of loneliness in lower- and middle-income countries: A systematic review of qualitative studies

Loneliness is understood as a subjective experience resulting from unmet social relationship expectations. As most loneliness research has been conducted in higher-income-countries, there is limited understanding of loneliness in relation to diverse cultural, economic, and socio-political factors. To address this gap, the present review systematically synthesises existing qualitative studies on the experience of loneliness and social relationship expectations in lower- and middle-income countries (LMICs). Between June and July 2022, six online databases (Embase, Ovid Medline, APA PsycINFO, Global Health, Web of Science, Google Scholar) were searched for peer-reviewed studies from LMICs on loneliness using qualitative methods. There were no restrictions on publication date, language, or study setting. Studies that solely focused on social isolation or were conducted with children (<16 years) were excluded. Risk of bias was assessed with the Critical Appraisal Skills Programme. After deduplication, a total of 7866 records were identified and screened for inclusion, resulting in 24 studies published between 2002 and 2022. The included studies represent data from 728 participants in 15 countries across West Africa (Ghana, Nigeria, Niger, Mali), East Africa (Uganda, Kenya), North Africa (Egypt), West Asia (Iran), South Asia (India, Pakistan, Sri Lanka) and Southeast Asia (Myanmar, Cambodia, Indonesia, Philippines). Data were analysed combining inductive and deductive coding, summarised using narrative synthesis, and examined by geographical region. Common features of loneliness included rejection, overthinking, and pain. Loneliness was related to depression across regions. Whereas loneliness tended to be distinguished from social isolation in studies from Africa, it tended to be related with being alone in studies from Asia. Poverty and stigma were common barriers to fulfilling social relationship expectations. This review illustrates how loneliness and expectations are contextually embedded, with some expectations possibly being specific to a certain culture or life stage, having implications for assessment of and interventions for loneliness worldwide.

Loneliness and its correlates among older adults living with HIV: A multicenter cross-sectional study

BACKGROUND

With the aging among people living with HIV, it is critical to understand the health needs of older adults (aged 50 years and above) living with HIV (OALHIV). Loneliness, as the next critical public health issue, was rarely mentioned among OALHIV.

METHODS

A multicenter cross-sectional study was conducted between April 2021 and April 2022. Participants were recruited from infectious diseases hospitals that provide HIV care in four cities in China. The associations with loneliness symptoms (measured by a three-item UCLA Loneliness Scale) were analyzed by logistic regression models.

RESULTS

A total of 680 OALHIV (500 men, 180 women, mean age 60.3 ± 7.8 years) were included in the analysis. About one-fifth (18.1 %) of OALHIV reported loneliness symptoms. Living in urban areas (aOR 3.50, 95 % CI 1.76-6.95), having children without close intergenerational relationships (2.85, 1.15-7.07), higher self-perceptions of aging (1.10, 1.06-1.15), being heterosexual (0.26, 0.13-0.52) or bisexual (0.37, 0.16-0.82), having children with whom they kept close intergenerational relationships (0.36, 0.14-0.98), and reporting life satisfaction (0.40, 0.24-0.66), were associated with loneliness symptoms.

LIMITATIONS

This study is a cross-sectional study and only included OALHIV who participated in antiretroviral therapy treatment for >18 months, which is not widely representative.

CONCLUSIONS

Loneliness was prevalent among OALHIV. Living in urban areas, being homosexual, having children with whom they kept fragile intergenerational relationships, being dissatisfied with life, and having higher self-perceptions of aging were independent risk factors for loneliness. Routine health management for OALHIV needs to incorporate the assessment of aging perceptions and loneliness.

Use of home and community-based services and loneliness in older people with functional limitations: a cross-sectional study

BACKGROUND

Loneliness is one of the major health problems among older adults. Among this population, home and community-based services (HCBS) have become increasingly popular. Despite its health benefits, little is known about the relationship between HCBS use and loneliness in older people with functional limitations. We aim to explore the characteristics of loneliness among older people with functional limitations and examine the association between HCBS use and loneliness in China.

METHODS

We used a cross-sectional data from the 2018 China Health and Retirement Longitudinal Study, which includes a nationally representative sample of Chinese residents aged 65 and older with functional limitations. Logistic regression models were used to examine the associations between HCBS use and loneliness, and we further used propensity score matching to address potential sample selection bias.

RESULT

In China, 46% of older people with functional limitations felt lonely and only 22% of older people with functional limitations reported using HCBS in 2018. Compared with participants who did not receive HCBS, those who received HCBS were less likely to report loneliness (OR = 0.81, 95% CI = 0.63, 0.99, p = 0.048), and the results remained significant after addressing sample selection bias using propensity score matching.

CONCLUSION

Our results showed that loneliness was common among Chinese older people with functional limitations, and the proportion of HCBS use was low. There was robust evidence to support that among older people with functional limitations, HCBS use was associated with decreased loneliness. Further policies should promote the development of broader HCBS use for older people with functional limitations to reduce their loneliness.

A meta-analysis of the association between loneliness and all-cause mortality in older adults

Despite the well-established association between loneliness and all-cause mortality in older adults, it remains unknown whether this association holds for older adults of different sex and whether it is influenced by different samples and study characteristics. Thus, this meta-analysis aims to examine moderators of the association between loneliness and all-cause mortality in older adults. To this end, relevant literature was retrieved from the PubMed, Embase, PsycINFO, Web of Science, Chinese National Knowledge Infrastructure, Weipu, and Wanfang databases (inception to May 2023) and was processed in the Comprehensive Meta-Analysis 3.3 software. Moreover, subgroup analysis was performed to explore the sources of heterogeneity and further explore potential moderators. Funnel plots, Begg's test, and Egger's linear regression test were used to examine the publication bias, and sensitivity analysis was used to test the robustness of the results. Thirty-six studies involving 128,927 older adults were included in this meta-analysis. In general, loneliness was related to an increase in all-cause mortality in older adults (HR = 1.09, 95% CI = 1.06-1.12, I2 = 63.31%, p < 0.001). The overall effect size for older men was 1.18 (95% CI = 1.04-1.33, p = 0.010). The association between loneliness and all-cause mortality was found to be significantly influenced by the source country of the data, follow-up length, and covariates for chronic disease as moderators. In conclusion, loneliness among older adults deserves more attention, and services are needed to improve their mental health.

Factors associated with healthy aging in Latin American populations

Latin American populations may present patterns of sociodemographic, ethnic and cultural diversity that can defy current universal models of healthy aging. The potential combination of risk factors that influence aging across populations in Latin American and Caribbean (LAC) countries is unknown. Compared to other regions where classical factors such as age and sex drive healthy aging, higher disparity-related factors and between-country variability could influence healthy aging in LAC countries. We investigated the combined impact of social determinants of health (SDH), lifestyle factors, cardiometabolic factors, mental health symptoms and demographics (age, sex) on healthy aging (cognition and functional ability) across LAC countries with different levels of socioeconomic development using cross-sectional and longitudinal machine learning models (n = 44,394 participants). Risk factors associated with social and health disparities, including SDH (β > 0.3), mental health (β > 0.6) and cardiometabolic risks (β > 0.22), significantly influenced healthy aging more than age and sex (with null or smaller effects: β < 0.2). These heterogeneous patterns were more pronounced in low-income to middle-income LAC countries compared to high-income LAC countries (cross-sectional comparisons), and in an upper-income to middle-income LAC country, Costa Rica, compared to China, a non-upper-income to middle-income LAC country (longitudinal comparisons). These inequity-associated and region-specific patterns inform national risk assessments of healthy aging in LAC countries and regionally tailored public health interventions.

A systematic review and meta-analysis of 90 cohort studies of social isolation, loneliness and mortality

The associations between social isolation, loneliness and the risk of mortality from all causes, cardiovascular disease (CVD) and cancer are controversial. We systematically reviewed prospective studies on the association between social isolation, loneliness and mortality outcomes in adults aged 18 years or older, as well as studies on these relationships in individuals with CVD or cancer, and conducted a meta-analysis. The study protocol was registered with PROSPERO (reg. no. CRD42022299959). A total of 90 prospective cohort studies including 2,205,199 individuals were included. Here we show that, in the general population, both social isolation and loneliness were significantly associated with an increased risk of all-cause mortality (pooled effect size for social isolation, 1.32; 95% confidence interval (CI), 1.26 to 1.39; P < 0.001; pooled effect size for loneliness, 1.14; 95% CI, 1.08 to 1.20; P < 0.001) and cancer mortality (pooled effect size for social isolation, 1.24; 95% CI, 1.19 to 1.28; P < 0.001; pooled effect size for loneliness, 1.09; 95% CI, 1.01 to 1.17; P = 0.030). Social isolation also increased the risk of CVD mortality (1.34; 95% CI, 1.25 to 1.44; P < 0.001). There was an increased risk of all-cause mortality in socially isolated individuals with CVD (1.28; 95% CI, 1.10 to 1.48; P = 0.001) or breast cancer (1.51; 95% CI, 1.34 to 1.70; P < 0.001), and individuals with breast cancer had a higher cancer-specific mortality owing to social isolation (1.33; 95% CI, 1.02 to 1.75; P = 0.038). Greater focus on social isolation and loneliness may help improve people's well-being and mortality risk.

The moderating role of everyday discrimination on the association between post-traumatic stress and loneliness among older Puerto Ricans

OBJECTIVES

This study examines the relationship between post-traumatic stress and loneliness and whether this relationship varies by perceived everyday discrimination among older Puerto Ricans.

METHODS

A total of 304 Puerto Ricans aged 60 and above from Wave 3 of the Boston Puerto Rican Health Study were included. Ordinary least squares regression examined the association between post-traumatic stress, perceived everyday discrimination, and loneliness.

RESULTS

Post-traumatic stress was significantly associated with a higher level of loneliness (β = 0.282; p < 0.001; 95% CI: 0.142, 0.423). The interaction effect between post-traumatic stress and perceived everyday discrimination on loneliness was statistically significant (β = 0.083; p < 0.05; 95% CI: 0.062, 0.230). More specifically, the positive association between post-traumatic stress and loneliness becomes more robust with the increase in perceived everyday discrimination.

CONCLUSION

Given an increase in population size on the U.S. mainland and migration from Puerto Rico due to natural disasters and declining economic conditions, it is essential to better understand the effect of perceived discrimination against older Puerto Ricans on the mainland United States as well as those who immigrated and stayed through older age. Outreach strategies and interventions that address perceived discrimination can help mitigate loneliness among older Puerto Ricans who experienced trauma.

Understanding and Addressing Older Adults' Loneliness: The Social Relationship Expectations Framework

Loneliness is an experience resulting from a perceived discrepancy between expected and actual social relationships. Although this discrepancy is widely considered the "core mechanism" of loneliness, previous research and interventions have not sufficiently addressed what older adults specifically expect from their social relationships. To address this gap and to help situate research on older adults' loneliness within broader life span developmental theories, we propose a theoretical framework that outlines six key social relationship expectations of older adults based on research from psychology, gerontology, and anthropology: availability of social contacts, receiving care and support, intimacy and understanding, enjoyment and shared interests, generativity and contribution, and being respected and valued. We further argue that a complete understanding of loneliness across the life span requires attention to the powerful impacts of contextual factors (e.g., culture, functional limitations, social network changes) on the expression and fulfillment of older adults' universal and age-specific relationship expectations. The proposed Social Relationship Expectations Framework may fruitfully inform future loneliness research and interventions for a heterogeneous aging population.

Gender inequalities as contributors to dementia in Latin America and the Caribbean: what factors are missing from research?

The current knowledge of modifiable risk factors for dementia comes mainly from high-income countries. In Latin America and Caribbean countries, where the burden of gender and socioeconomic inequalities is greater than in high-income countries, the prevalence of dementia is also higher and disease onset is earlier, especially among women, even after adjustments for life expectancy. In this Personal View, we discuss socioeconomic modifiable risk factors for dementia established by previous studies and postulate further harmful and often hidden factors faced by women that might influence the gender-specific timing of onset and general prevalence of dementia. We emphasise some of the effects of gender roles, their direct and indirect effects on dementia, and how they disproportionately impact women. Finally, we highlight the importance of bringing hidden risk factors to open discussion to promote research with high-quality data and to encourage public policies to promote and preserve women's health.

Psychometric Properties of the 11-Item De Jong Gierveld Loneliness Scale in a Representative Sample of Mexican Older Adults

Recent studies have focused on the negative effects of loneliness on health and quality of life in older adults. The De Jong Gierveld Loneliness Scale (DJGLS) has been widely used and has proven to be a valid and reliable instrument for loneliness assessment. However, research on this topic and on the validation of measurement scales among the older population is still incipient. The objective of this study was to examine the psychometric properties of the Spanish version of the 11-item DJGLS in Mexican older adults. Data from a representative sample of cognitively intact older adults aged 60 years and over (mean, standard deviation [SD]) age = 72.0 years (SD 8.1) from two Mexican cities (n = 1913), interviewed face to face at their homes during 2018-2019, were analyzed. The psychometric properties of the DJGLS were examined, including (1) construct validity, examined by Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA), discriminate validity and convergent validity, (2) reliability, calculated using Cronbach's alpha. The overall data quality was high, and the scaling assumptions were generally met with few exceptions. Using EFA and CFA, the findings showed that the DJGLS presents a two-factor structure (Social Loneliness and Emotional Loneliness), with 11 items that explain 67.2% of the total variance. Reliability is adequate at the full-scale level (Cronbach´s α = 0.899), also for the two subscales Social and Emotional Loneliness (Cronbach´s α = 0.892 and 0.776, respectively). These results highlight that most participants with a low score for depressive symptoms and or with a high social support score belonged to the "No loneliness" group. The results showed that the Spanish version of the 11-item DJGLS is adequate for use in Mexican older adults and should be used not only for loneliness screening but also for social and emotional loneliness assessment.

Unpaid productive activities and loneliness in later life: Results from the Indonesian Family Life Survey (2000-2014)

INTRODUCTION

Contributing to society constitutes an essential part of healthy ageing. To date, however, it remains unclear how valuable contributions such as caregiving and volunteering, also described as unpaid productive activities, are related to older adults' loneliness. The present longitudinal study addresses this question in a lower-middle-income country, in Indonesia.

METHODS

Using data from two waves of the nationally representative Indonesian Family Life Survey (2000-2014), logistic regression models were applied with caregiving (to non-resident children, siblings, and parents) and volunteering (1-99 h, >100 h per year) as predictors and loneliness as outcome. Participants who were <50 years old and felt lonely at baseline were excluded. Results are reported as odds ratios (OR) and 95% confidence intervals (CI).

RESULTS

Of the 3,572 participants (52.8% women; Mean age: 60 years), 538 (15.1%) developed loneliness. In the unadjusted model, volunteering 1-99 h per year and caregiving to parents were each associated with a lower likelihood of feeling lonely later in life. For moderate volunteering (1-99 h), participating in the volunteer decision-making process was beneficial for loneliness. After adjusting for covariates, only the association between caregiving to parents and loneliness remained significant (OR=0.48, 95%CI: 0.27-0.81, p = 0.01). Specifically, providing care to parents who did not need help with daily activities was associated with lower loneliness.

CONCLUSION

This longitudinal study addresses important research gaps in the literature on global healthy ageing, as it relates to the protective role of older adults' unpaid productive activities on loneliness in Indonesia.

Association of loneliness and social isolation with all-cause mortality among older Mexican adults in the Mexican health and aging study: a retrospective observational study

BACKGROUND

Plenty of evidence shows how social isolation and loneliness are associated with increased risk for numerous diseases and mortality. But findings about their interactive or combined effects on health outcomes and mortality remains inconclusive.

OBJECTIVE

Analyze the longitudinal association of loneliness, social isolation and their interactions, with the all-cause mortality among older adults in Mexico.

METHODS

A retrospective observational study was conducted. Mexican adults older than 50 years were included. Data from the Mexican Health and Aging Study (MHAS) in the 2015 and 2018 waves were used. The subjects were classified according to their level of loneliness and the presence of social isolation. Multivariate logistic regression analyzes were performed to determine the degree of association between loneliness and social isolation with all-cause mortality at a 3-year follow-up.

RESULTS

From the total sample of 11,713 adults aged 50 years or over, 707 (6%) did not survive, 42% presented loneliness, and 53% were classified as socially isolated. After multivariate adjustment only social isolation (OR = 1.30, 95%CI:1.03-1.64) was associated with all-cause mortality, loneliness (Mild: OR = 0.83, 95%CI:0.59-1.16; Severe: OR = 1.03, 95%CI:0.71-1.64), and the interaction between loneliness and social isolation were not associated with all-cause mortality.

CONCLUSION

Social isolation, but not loneliness or their interaction, was associated with all-cause mortality in Mexican adults older than 50 years. This finding may help direct possible future interventions that help improve mental health in older adults from a highly collectivistic country.

A decreased trajectory of loneliness among Brazilians aged 50 years and older during the COVID-19 pandemic: ELSI-Brazil

This study aimed to estimate prevalence of loneliness among older Brazilian adults over the first seven months of the COVID-19 pandemic and to identify the predictors of loneliness trajectories. Pre-pandemic data derived from face-to-face interviews of participants of the 2019-2020 Brazilian Longitudinal Study of Aging (ELSI-Brazil), which is a nationally representative study of community-dwelling individuals aged 50 years and over. Pandemic data were based on three rounds of telephone interviews among those participants, conducted from May to October 2020. Loneliness was measured by a single-item question, considering those who had at least two repeated measures. Explanatory variables included depression, living alone, leaving home in the last week, and virtual connectedness in the last month. Mixed-effects logistic regression was used to estimate odds ratios with their 95% confidence intervals (95%CI) and to investigate loneliness trajectories and their predictors. In total, 5,108 participants were included. The overall prevalence of loneliness in the pre-pandemic period was 33.1% (95%CI: 29.4-36.8), higher than the pandemic period (round 1: 23.6%, 95%CI: 20.6-26.9; round 2: 20.5%, 95%CI: 17.8-23.5; round 3: 20.6%, 95%CI: 17.1-24.6). A significant interaction (p ≤ 0.05) was evidenced only between depression and time; participants with depression showed a greater reduction in loneliness levels. Although loneliness levels in Brazil have decreased during the pandemic, this pattern is not present for all older adults. Individuals with depression had a more significant reduction, probably due to feeling closer to their social network members during the stay-at-home recommendations.

Prevalence and determinants of social isolation among elderly in an urban slum of Raipur city-A community based cross-sectional study

BACKGROUND

Social isolation is a predictor of mortality and morbidity, as well as an outcome of many health-related predictors. The aim of this study was to estimate the prevalence of social isolation among the elderly and to study factors associated with it.

METHODS

This was an analytical cross-sectional study conducted in Urban Field Practice Area of a tertiary care teaching hospital in Chhattisgarh, India among elderly more than or equal to 60 years of age selected using random sampling. The data was collected in a sample of 400 elderly by face-to-face interview using predesigned, pretested, and semi-structured proforma that included Lubben Social Network Scale-6 (LSNS-6) and analyzed using Stata v16.

RESULTS

The prevalence of social isolation was 34.3%; highest among those 65-74 years of age (44.5%) and females (56.9%). Increasing age, elderly with less than three family members, lower socio-economic status, no children and financial dependence among socio-demographic factors; insufficient time with children, lack of emotionally attachment and conflict in the family among family support factors; lack of social participation, poor perception of health and feeling lonely among psychosocial factors; lack of physical exercise, spiritual activity and sound sleep among lifestyle factors; and presence of active complaints, raised blood pressure and being anemic among medical factors were significantly associated with social isolation. Overall, the independent predictors of social isolation in elderly were age ≥75 years, lack of participation in social functions, feeling lonely and lack of sound sleep.

CONCLUSION

The prevalence of social isolation among elderly from an urban slum in India was high and the existing evidence show a rising trend. Social isolation assessment and use of LSNS-6 by healthcare providers should be incorporated into elderly care at primary healthcare delivery points across the country.

Loneliness in Older Indian Dyads

BACKGROUND

Loneliness has been recognised as a major public health concern in older adults in developed nations, with little focus on low- and middle-income countries such as India. While the protective nature of social relationships on loneliness has been explored in the context of marriage, typically these benefits are examined in individual spouses rather than within the marital dyad.

METHODS

A sample of 398 opposite-sex married Indian couples (mean age 54.8 years) was obtained from the pilot wave of the Longitudinal Aging Study in India (LASI) conducted in 2010. These cross-sectional data were analysed using the Actor-Partner Interdependence Model, with one's own and one's partner's cognitive function, functional limitations, depressive symptoms, employment status and contact with friends included as predictors of loneliness.

RESULTS

There were no gender differences in the pattern of associations. Depression was positively associated with loneliness with actor and partner effects being significant. One's partner being employed was associated with less loneliness.

CONCLUSIONS

The sample showed low levels of depression, loneliness, and reduced functionality; however, depression still predicted one's own and one's partner's loneliness. Future work using longitudinal data could examine the role of employment in loneliness, particularly within the context of gender roles.

The Relationship Between Social Isolation and Mortality Among Adults Aged 50 and Older in a 12-year Follow-Up Analysis in Mexico

Social relationships have a complex nature shaped mainly by two dimensions: structure and function. Previous research raised the importance of considering both features simultaneously given that they may operate differently. However, research on social relationships and mortality mainly refers to European and U.S. populations. This study examines structural and functional features of social relationships to understand social isolation among adults aged 50 and older in Mexico. In addition, we analyze that association with mortality, using panel data from a 12-year follow-up from the Mexican Health and Aging Study (2003-2015). Results reveal that structural and functional features of social relationships are intertwined, and social isolation was shaped by two aspects that we label lack of socialization and being alone and feeling lonely. After controlling for a series of sociodemographic and health variables, Cox proportional hazard regression models indicate that both aspects significantly increase mortality among older adults in Mexico.

Evaluation of the Effectiveness of Digital Technology Interventions to Reduce Loneliness in Older Adults: Systematic Review and Meta-analysis

BACKGROUND

Loneliness is a serious public health issue, and its burden is increasing in many countries. Loneliness affects social, physical, and mental health, and it is associated with multimorbidity and premature mortality. In addition to social interventions, a range of digital technology interventions (DTIs) are being used to tackle loneliness. However, there is limited evidence on the effectiveness of DTIs in reducing loneliness, especially in adults. The effectiveness of DTIs in reducing loneliness needs to be systematically assessed.

OBJECTIVE

The objective of this study is to assess the effectiveness of DTIs in reducing loneliness in older adults.

METHODS

We conducted electronic searches in PubMed, MEDLINE, CINAHL, Embase, and Web of Science for empirical studies published in English from January 1, 2010, to July 31, 2019. The study selection criteria included interventional studies that used any type of DTIs to reduce loneliness in adults (aged ≥18 years) with a minimum intervention duration of 3 months and follow-up measurements at least 3 months after the intervention. Two researchers independently screened articles and extracted data using the PICO (participant, intervention, comparator, and outcome) framework. The primary outcome measure was loneliness. Loneliness scores in both the intervention and control groups at baseline and at follow-up at 3, 4, 6, and 12 months after the intervention were extracted. Data were analyzed via narrative synthesis and meta-analysis using RevMan (The Cochrane Collaboration) software.

RESULTS

A total of 6 studies were selected from 4939 screened articles. These studies included 1 before and after study and 5 clinical trials (4 randomized clinical trials and 1 quasi-experimental study). All of these studies enrolled a total of 646 participants (men: n=154, 23.8%; women: n=427, 66.1%; no gender information: n=65, 10.1%) with an average age of 73-78 years (SD 6-11). Five clinical trials were included in the meta-analysis, and by using the random effects model, standardized mean differences (SMDs) were calculated for each trial and pooled across studies at the 3-, 4-, and 6-month follow-ups. The overall effect estimates showed no statistically significant difference in the effectiveness of DTIs compared with that of usual care or non-DTIs at follow-up at 3 months (SMD 0.02; 95% CI -0.36 to 0.40; P=.92), 4 months (SMD -1.11; 95% CI -2.60 to 0.38; P=.14), and 6 months (SMD -0.11; 95% CI -0.54 to 0.32; P=.61). The quality of evidence was very low to moderate in these trials.

CONCLUSIONS

Our meta-analysis shows no evidence supporting the effectiveness of DTIs in reducing loneliness in older adults. Future research may consider randomized controlled trials with larger sample sizes and longer durations for both the interventions and follow-ups.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

RR2-10.1136/bmjopen-2019-032455.