Living alone and cognitive function in later life

The impact of social isolation on functional disability in older people: A multi-cohort study

OBJECTIVES

We assessed the relationship between social isolation and functional disability in older people.

DESIGN

Comparison of longitudinal cohort studies.

SETTING AND PARTICIPANTS

Harmonised longitudinal datasets from the United States, England, European countries, Japan, Korea, China and Hong Kong.

METHODS

Social isolation was operationalised as a composite score with five domains, such as marital status, living alone, and social contact with others. Functional disability was defined as whether the cohort participant had any difficulty in activities of daily living (ADL). In each dataset, we used robust Poisson regression models to obtain the relative risks (RRs) and the corresponding 95 % confidence intervals (CI). We combined the RRs to synthesize a pooled estimate using meta-analysis with random-effects models.

RESULTS

Overall, the social isolation composite score was not associated with ADL disability (pooled RR = 1.05, 95 % CI [0.97-1.14], n = 40,119). Subgroup analysis suggested social isolation composite score was associated with ADL disability in Asian regions (pooled RR = 1.09, 95 % CI [1.02, 1.16], but not in Western regions (pooled RR = 1.01, 95 % CI [0.96, 1.07]). The relationships between different domains of social isolation and ADL disability were heterogeneous, except that no participation in any social clubs or religious groups was consistently associated with ADL disability (pooled RR = 1.12, 95 % CI [1.04, 1.21]).

CONCLUSION

Targeting social isolation may prevent decline in functional abilities in older adults, providing an avenue to active and healthy ageing. Nonetheless, interventions tackling social isolation should tailor to the unique cultural and social underpinnings. A limitation of the study is that reverse causality could not be ruled out definitively.

Cognitive reserve proxies are associated with age-related cognitive decline - Not age-related gait speed decline

Cognition and gait share brain substrates in aging and dementia. Cognitive reserve (CR) allows individuals to cope with brain pathology and delay cognitive impairment and dementia. Yet, evidence for that CR is associated with age-related cognitive decline is mixed, and evidence for that CR is associated with age-related gait decline is limited. In 1,079 older (M Age = 75.4 years; 56.0% women) LonGenity study participants without dementia at baseline and up to 12 years of annual follow-up (M follow-up = 3.9 years, SD = 2.5 years), high CR inferred from cognitive (education years), physical (number of blocks walked per day; weekly physical activity days), and social (volunteering/working; living with someone) proxies were associated with slower rates of age-related decline in global cognition - not gait speed decline. Thus, cognitive, physical, and social CR proxies are associated with cognitive decline in older adults without dementia. The multifactorial etiology and earlier decline in gait than cognition may render it less modifiable by CR proxies later in life.

Association between formal social participation and cognitive function in middle-aged and older adults: a longitudinal study using SHARE data

Formal social participation significantly impacts health and well-being, potentially mitigating cognitive decline, although not consistently across all studies. Existing research often focuses solely on baseline participation levels, and age-related differences have primarily been explored among the Asian population. Therefore, this longitudinal study aims to assess the association between formal social participation and cognition across different age groups in individuals aged 50+ living in Europe and Israel, while capturing the dynamic nature of formal social participation. We use data from three waves (four, six, and eight) of the Survey of Health, Ageing, and Retirement in Europe (SHARE), comprising 85,601 respondents. Linear mixed-effects models were applied. The results show that participation in formal social activities mitigates cognitive decline in middle-aged and older adults, especially among those aged 70 to 79 and 80+. These findings support the need for social policies promoting formal social activities, for lasting cognitive health benefits.

Association of the combination of social isolation and living alone with cognitive impairment in community-dwelling older adults: The IRIDE Cohort Study

BACKGROUND

Living alone has been associated with cognitive impairment; however, findings have been inconsistent. Social isolation among older adults who live alone may contribute to cognitive impairment. This study was carried out to examine the association of social isolation and living alone with cognitive impairment in community-dwelling older adults.

METHODS

In this cross-sectional study, data from the Integrated Research Initiative for Living Well with Dementia Cohort Study, which comprises pooled data from five community-based geriatric cohorts, was used. Social isolation was defined as infrequent interactions with others. Participants were categorized into four groups based on their social isolation and living alone statuses. Cognitive function was assessed using the Mini-Mental State Examination, with a score <24 indicating cognitive impairment. The association between social isolation combined with living alone and cognitive impairment was analyzed using logistic regression.

RESULTS

Of the 4362 participants included in the analysis (mean age 75.6 years, 44.3 % male), 11 % had cognitive impairment. Regardless of living alone, social isolation was associated with cognitive impairment (no social isolation x not living alone: reference, social isolation x not living alone; odds ratio (OR): 1.74, 95 % confidence interval (CI): 1.29-2.33, social isolation x living alone; OR: 2.10, 95 % CI: 1.46-3.01).

CONCLUSIONS

Social isolation is associated with cognitive impairment; however, living alone is not intrinsically associated with cognitive impairment in older adults. Healthcare providers must focus on social interactions to prevent cognitive impairment in older adults rather than simply focusing on living arrangements.

Impact of Lifestyle on Urinary Incontinence Severity among Women: A Cross-Sectional Study in East China

INTRODUCTION AND HYPOTHESIS

Identifying the factors influencing the development of female urinary incontinence (UI) may facilitate early intervention, potentially delaying its progression. This study was aimed at investigating the impact of lifestyle habits on the severity of UI among women in East China.

METHODS

This study included 414 women from six communities in East China who reported symptoms of UI and was conducted between September and December 2020. Data were collected using a general information questionnaire, the Toileting Behaviours: Women's Elimination Behaviours scale, and the International Consultation on Incontinence Questionnaire Urinary Incontinence Short Form Chinese Version. Participants were categorised into two groups: those with mild UI and those with moderate-to-severe UI. Propensity-score matching was performed to balance confounding factors, and logistic regression was used to explore the relationship between lifestyle behaviours and UI severity.

RESULTS

A total of 117 pairs were successfully matched. Logistic regression analysis revealed that daily perineal cleaning significantly protected against moderate-to-severe UI (p < 0.05). Conversely, living alone, poor sleep quality and hovering over the toilet while voiding were identified as independent risk factors for moderate-to-severe UI (p < 0.05).

CONCLUSION

Several lifestyle habits significantly impact the severity of UI among adult women. Screening for mild urinary leakage symptoms and implementing timely interventions are crucial for preventing the aggravation of UI and improving ability to work and quality of life.

"It's day to day problems:" Experiences of people with aphasia who live alone

PURPOSE

Living alone is increasing and associated with health and social risks. Aphasia compounds these risks but there is little research on how living alone interacts with aphasia. This study is a preliminary exploration of this issue.

METHOD

Five people with aphasia who lived alone participated in two supported semi-structured interviews, with the second interview including sharing an artefact that held significance for living alone with aphasia. Interviews were recorded, transcribed verbatim, and analysed through reflexive thematic analysis.

RESULT

Four themes encompassed meaning-making about living alone with aphasia: relationships and reliance on others; risk, vulnerability, and uncertainty; loneliness and time alone; self-reliance and the need to keep busy. Participants had to continuously manage and renegotiate daily challenges around living alone with aphasia.

CONCLUSION

Living alone increases the risk of loneliness. For people with aphasia, the buffer against loneliness provided by social connection and meaningful activity may be more difficult to achieve because of communication challenges. While experiences vary, reliance on others, managing practical and administrative tasks, and negotiating risks are all important issues when alone. The intersection of living alone, loneliness, and living with aphasia needs more research, and more explicit clinical focus when discussing and planning intervention and support.

10-Year Cognitive Change in the Faroese Septuagenarian Cohort and Impact of Sociodemographic, Lifestyle, and Health Factors

OBJECTIVES

To investigate cognitive change in multiple cognitive domains in a population-based cohort of 713 Faroese older adults.

METHODS

Participants were cognitively tested at baseline (70-74 years) and re-evaluated after 10 years. Changes in cognitive performance and the impact of sociodemographic factors, lifestyle, and health conditions were analysed using mixed-effect models. Participants free from dementia were studied in separate analyses.

RESULTS

A significant decline over 10 years was observed in most of the neuropsychological tests. People living in rural areas, married or cohabiting people, people without professional education, slightly older persons, smokers, teetotalers, and people with heart disease and abnormal electrocardiogram (ECG) had a steeper decline in cognitive ability. Conflicting results were found for sex and people with myocardial infarction (MI).

DISCUSSION

There are modifiable factors that contribute to cognitive decline which should be addressed in future public health efforts.

Factors and brain imaging features associated with cognition in oldest-old patients with Alzheimer-type dementia

BACKGROUND

The underlying pathophysiology of cognitive dysfunction in oldest-old patients with Alzheimer-type dementia (AD) has not been clarified to date. We aimed to determine the factors and brain imaging features associated with cognition in oldest-old patients with AD.

METHODS

We enrolled 456 consecutive outpatients with probable AD (145 men and 311 women, age range: 51-95 years). Demographic factors, such as education level, disease duration at initial visit, body mass index, comorbidities, frailty, and leisure activity, and brain imaging features, including severity of medial temporal lobe (MTL) atrophy, white matter lesions and infarcts, and frequency of posterior cerebral hypoperfusion were compared among pre-old (≤ 74 years), old (75 to 84 years), and oldest-old (≥ 85 years) subgroups.

RESULTS

The oldest-old subgroup showed significantly longer disease duration, lower education level, more severe frailty, less leisure activity, worse cognitive impairment, a tendency of slower progression of cognitive decline, greater MTL atrophy, more severe white matter hyperintensities and infarcts, and lower frequency of posterior hypoperfusion than the younger age subgroups. Regarding the brain imaging subtypes, there were significantly more patients with the limbic-predominant subtype and fewer patients with the hippocampal-sparing subtype in the oldest-old AD group than the pre-old AD group.

CONCLUSIONS

Oldest-old patients with AD show different factors and brain imaging features associated with cognition from pre-old and old patients. Our results are expected to provide useful information towards understanding the pathophysiology of oldest-old patients with AD, and for determining their clinical diagnosis and appropriate management methods.

Smaller household size and higher prevalence of serious psychological distress in younger people and never-married people: a nationwide cross-sectional survey in Japan

Background

Small-member households are increasing worldwide. However, most previous studies have focused on older people and living alone. Using the latest national survey data, we investigated a dose-response relationship between household size and serious psychological distress (SPD).

Methods

We analyzed data from the 2019 Comprehensive Survey of Living Conditions in Japan. The study participants were 405,560 community-dwelling adults aged 20 or older. Household size was classified into 5 or more, 3 or 4, two, and one (i.e., living alone). SPD was defined as ≥13 points based on the Kessler 6-item Psychological Distress Scale. We used multivariable logistic regressions and included age, education, equivalent household expenditures, housing tenure, employment contract, smoking, and illness under treatment as covariates.

Results

After stratified analyses by age and gender, a dose-response relationship between smaller household size and more common SPD was significant for younger, but not for older people (p-trend was <0.001 in men aged 20-59 and women aged 20-39). After stratified analyses by gender and marital status, a dose-response relationship was significant only for the never-married group in both genders (p-trend was <0.001 in never-married men and women).

Conclusion

Smaller households were associated with higher prevalence of SPD in younger adults and in never-married individuals, regardless of gender. Our findings suggest a need to focus on younger people and never-married people to reduce the mental health risks due to small household sizes.

Intervention to reduce loneliness among older adults in the community: Making friends with volunteers

AIM

This study aimed to examine the effects of providing a program that introduced volunteers to make friends with older adults to reduce loneliness and increase loneliness literacy.

METHODS

Eight community development associations in Taiwan participated in the study. In the first stage, older people living alone or with only a spouse, or those with a family, but without substantial interactions, were screened for loneliness. Older adults with a higher risk of loneliness were given priority to be invited to participate in this intervention. This 3-month intervention program was designed by each community development association and delivered at the older adults' homes. A total of 87 older persons completed both waves of the interviews.

RESULTS

Loneliness was reduced (UCLA-6 Loneliness Scale scores decreased from 13.5 to 11.6), and loneliness literacy improved (loneliness literacy scores increased from 38.9 to 42.0) compared with what it was before the program. In a generalized linear model, when controlling for covariates, loneliness was reduced, but not significantly (B = -0.934, P > 0.05), whereas loneliness literacy improved significantly for older participants (B = 2.088, P < 0.05).

CONCLUSIONS

Making friends with older adults who are lonely might improve their loneliness literacy. Geriatr Gerontol Int 2024; 24: 240-245.

Association of living alone and living alone time with hypertension among Chinese men aged 80 years and older: a cohort study

Objective

There is little evidence of the influence of living alone on hypertension risk among men 80 years or older. Additionally, the influence of living alone duration on hypertension risk lacks thorough investigation. Hence, this cohort study examines living alone and its duration's link to hypertension risk in this specific group.

Methods

We included 2009 older men aged ≥80 years without hypertension from the Chinese Longitudinal Healthy Longevity Survey in the 2008 wave. Follow-up was conducted in the 2011 wave. Multivariable Cox proportional hazards models estimated hazard ratios (HRs) and 95% confidence intervals (CIs) to assess hypertension risk related to living alone and living alone time.

Results

We included 2,009 older men, with a mean age of 90.7 years (standard deviation: 6.8). Over a median follow-up of 2.9 (1.3-3.0) years, 573 participants (28.5%) developed hypertension. Living alone was significantly associated with a higher hypertension risk than living with family (HR: 1.42; 95% CI 1.11-1.80). When compared to living with family, the hypertension risk was increased in the first quartile of living alone time (0-6.1 years) (HR: 1.76; 95% CI 1.16-2.66), the second quartile (6.1-10.6 years) (HR: 1.56; 95% CI 1.07-2.29), and the third quartile (10.6-19.3 years) (HR: 1.66; 95% CI 1.08-2.55). Surprisingly, no significant association was found in the fourth quartile (≥19.3 years) with hypertension risk. Stratified and Interaction analyses indicated no significant interaction effects between subgroups. Sensitivity analyses yielded consistent results.

Conclusion

Living alone was independently associated with an increased risk of hypertension in older men. The highest risk was found in those with the least time alone. These findings imply that social isolation and lack of companionship could be pivotal in hypertension development. Furthermore, the study highlights the need to consider living alone duration when assessing its impact on health outcomes.

Correlations between Dementia and Loneliness

This review describes associations between dementia and loneliness on the neurobiological and epidemiological levels according to the recent body of literature. The aim of this study was to highlight major lines of research in this field. Sociocognitive skills and social interactions present complex interdependencies with dementia which may be explained by two theories. According to the first one, not sufficiently engaging in social or cognitive activities results in brain atrophy. The second one claims that brain neurogenesis and synaptic density are being increased by social connections. The relationship between loneliness and dementia could be mediated by sensory loss, including hearing and visual impairment, as well as depression and psychotic symptoms. Loneliness itself might cause a depletion in sensory and cognitive stimulation which results in a decrease in neural reserve. Certain changes in the structures of the brain caused by loneliness were found in imaging examination. Loneliness appears to be a crucial risk factor for dementia in recent times due to the modern lifestyle and consequences of the outbreak of COVID-19. Additional studies are required to understand more completely the key tenets of this topic and therefore to improve the prevention and treatment of dementia.

Psycho-social and health predictors of loneliness in older primary care patients and mediating mechanisms linking comorbidities and loneliness

BACKGROUND

Aging is associated with many personal, social, and environmental challenges that increase the risk of loneliness. Loneliness is a painful emotional experience associated with a perceived lack of connection and intimacy. Loneliness accelerates health deterioration, but the presence of chronic health conditions (comorbidities) in older individuals may potentiate the feeling of loneliness. The relationships between health status and loneliness in older individuals have not been assessed in an integrated manner, although it is necessary for planning efficient interventions. The aim of this study was to fill in this knowledge gap, by attempting to create an integrated model of loneliness in older individuals.

METHODS

The sample consisted of 189 (58% F) older individuals (> 60 years) (mean ± SD, 78.47 ± 6.65), attendees in Primary Health Care. Different factors associated with loneliness in the older population were assessed, and classified as demographic, environmental, physical (health-related), and psychological, in addition to functional abilities. A set of standard questionnaires was used to assess psychological factors and functional abilities. The hierarchical regression model assessed the effect of particular blocks of factors on status loneliness. The second aim was to analyze how psychological factors mediate associations between health status (comorbidity level) and loneliness.

RESULTS

Indicated that increasing comorbidity, anxiety, lack of positive moods, not having hobbies/activities, low perception of social support, impaired cognitive function, and suppression of emotion expression, are significant predictors of loneliness. Mediation analysis informed us of how to help patients with comorbidities feel less lonely. Interventions that were suggested were those that can reduce anxiety and depression, improve cognitive abilities and emotional regulation control, and enhance social support.

CONCLUSIONS

Results can help understand the pathophysiology loops linking poor health status (comorbidity level) of older individuals and loneliness, and have significant potentials from the translational perspectives, as a decision-support tool.

Social and Emotional Loneliness: Their Relationship to Multiple Domains of Cognition in Later Life

Despite the fact that the literature suggests loneliness to undermine cognitive functioning in later life, no work has simultaneously examined the relationships between these constructs taking a multidimensional approach to the assessment of each. The present study explored relationships among social and emotional loneliness and both general crystallized (Gc) and general fluid (Gf) ability, as well as to several indices of everyday intellectual functioning in later life. Sequential regression analyses suggested that neither social nor emotional loneliness predicted Gc. However, only when eliminating health as a covariate was more social loneliness associated with lower scores for Gf. Surprisingly, more emotional loneliness was associated with higher scores for Gf. More social loneliness also predicted more everyday cognitive failures and with less positive lifestyle attitudes. These findings support a view of loneliness-cognition relationships in later life that reflects the multidimensional nature of each construct.

A Study on the Longitudinal Relationship between Changes in Depression and Cognitive Function among Older Adults Living Alone

BACKGROUND

As South Korea faces unprecedented population aging, this longitudinal study examined the relationship between depression and cognitive function changes in older individuals living alone.

METHODS

The study used data from the Korean Longitudinal Study of Aging (KLoSA). A total of 1354 participants with data available over a period of at least three years, from 2016 (wave 1) to 2020 (wave 8), were included, and latent growth modeling (LGM) was used for analysis.

RESULTS

Depression levels increased gradually among older individuals living alone and cognitive function declined over time among older adults living alone. Moreover, higher initial depression levels were associated with lower initial cognitive function levels and a more rapid cognitive decline over time. Therefore, it is imperative that depression be addressed as a potential cause of cognitive impairment and dementia. Furthermore, rapid increases in depression corresponded to rapid declines in cognitive function, indicating the need for continuous monitoring and intervention in cases of escalating depression, as it may negatively affect cognitive abilities.

CONCLUSIONS

These findings highlight the complex interplay between depression and cognitive function among older individuals living alone. Policy support to encourage participation in these programs is crucial to enhance the well-being of this vulnerable population.

Prevalence and determinants of depressive symptoms among community-dwelling older adults in China based on differences in living arrangements: a cross-sectional study

BACKGROUND

Older adults with different living arrangements may have different mental health statuses and different factors that influence their mental health. The aim of the present study is to investigate the prevalence and determinants of depressive symptoms among community-dwelling older adults in China based on differences in their living arrangements.

METHODS

Participants were 6,055 older adults from the 2015 China Health and Retirement Longitudinal Study. Depressive symptoms and their determinants were evaluated using the 10-item Center for Epidemiologic Studies Depression Scale and multivariate logistic regression analysis, respectively.

RESULTS

The prevalence of depressive symptoms among older adults living alone, as a couple, and with children was 47.8%, 33.2%, and 39.5%, respectively. The common risk factors for depressive symptoms were shorter sleep duration, poorer activities of daily living, and poorer self-rated health. Women, those with lower educational levels, and those suffering from chronic diseases had a higher risk of depressive symptoms among older adults living as a couple and those living with children. Smoking and participation in economic activities were also risk factors of depressive symptoms among older adults living with children and those living alone, respectively.

CONCLUSIONS

The findings suggest that older adults living as couples had the lowest prevalence of depressive symptoms, while those living alone had the highest prevalence of depressive symptoms. The determinants of depressive symptoms differed by living arrangement; hence, they should be considered in future interventions.

The A-to-Z factors associated with cognitive impairment. Results of the DeCo study

Introduction

Cognitive impairment (CI) is known to be mediated by several risk and protective factors, many of which are potentially modifiable. Therefore, it is important to have up-to-date studies that address a standard assessment of psychosocial, clinical and lifestyle variables.

Materials and methods

We conducted a cross-sectional observational study, with a 24-month timeframe, to estimate the relationship between risk and protective factors associated with dementia, according to the A-to-Z Dementia Knowledge. Participants were considered at CI risk if they tested positive for at least one of three validated CI screening tests: The Memory Impairment Screening, Short Portable Mental State Questionnaire, and Semantic Verbal Fluency. The A-to-Z data Collection included Mediterranean Diet Adherence Screener and Geriatric Depression Scale.

Results

The estimated prevalence of CI was 22.6% in a sample of 709 patients with an average of 69.3±10.3 years. The risk factors gradually associated with cognitive decline were hypertension, loneliness, and depression. In contrast, the protective factors gradually associated with less cognitive decline were internet use, reading, and intellectually stimulating jobs. Finally, living alone, having diabetes, taking benzodiazepines, and sleeping more than 9 h were statistically significant associated with CI, whereas to do memory training or a family history of dementia was characteristic of patients without CI.

Conclusion

A joint assessment of the influence of psychosocial, clinical, and lifestyle-related factors is needed to develop dementia prevention strategies.

The impact of loneliness and social isolation on the development of cognitive decline and Alzheimer's Disease

Alzheimer's Disease (AD) is the leading cause of dementia, observed at a higher incidence in women compared with men. Treatments aimed at improving pathology in AD remain ineffective to stop disease progression. This makes the detection of the early intervention strategies to reduce future disease risk extremely important. Isolation and loneliness have been identified among the major risk factors for AD. The increasing prevalence of both loneliness and AD emphasizes the urgent need to understand this association to inform treatment. Here we present a comprehensive review of both clinical and preclinical studies that investigated loneliness and social isolation as risk factors for AD. We discuss that understanding the mechanisms of how loneliness exacerbates cognitive impairment and AD with a focus on sex differences will shed the light for the underlying mechanisms regarding loneliness as a risk factor for AD and to develop effective prevention or treatment strategies.

Cumulative loneliness and subsequent memory function and rate of decline among adults aged ≥50 in the United States, 1996 to 2016

INTRODUCTION

The study objective was to investigate the association between loneliness duration and memory function over a 20-year period.

METHODS

Data were from 9032 adults aged ≥50 in the Health and Retirement Study. Loneliness status (yes vs. no) was assessed biennially from 1996 to 2004 and its duration was categorized as never, 1 time point, 2 time points, and ≥3 time points. Episodic memory was assessed from 2004 to 2016 as a composite of immediate and delayed recall trials combined with proxy-reported memory. Mixed-effects linear regression models were fitted.

RESULTS

A longer duration of loneliness was associated with lower memory scores (P < 0.001) and a faster rate of decline (P < 0.001). The association was stronger among adults aged ≥65 than those aged <65 (three-way interaction P = 0.013) and was stronger among women than men (three-way interaction P = 0.002).

DISCUSSION

Cumulative loneliness may be a salient risk factor for accelerated memory aging, especially among women aged ≥65.

HIGHLIGHT

A longer duration of loneliness was associated with accelerated memory aging. The association was stronger among women than men and among older adults than the younger. Reducing loneliness in mid- to late life may help maintain memory function.

Impact of COVID-19 policies on perceptions of loneliness in people aged 75 years and over in the cognitive function and aging study (CFAS II)

BACKGROUND

The COVID-19 pandemic and associated social distancing measures have profoundly impacted society and social contact patterns, with older people disproportionately affected. Concerns have been raised about a resulting pandemic of loneliness in older people, although the current evidence is mixed. This study provides a unique perspective on the prevalence of loneliness in a population cohort of older people before the pandemic, followed up after the introduction of social restrictions.

METHODS

Data analysis was conducted using Wave 3 of the longitudinal Cognitive Function and Aging Study II (2018-2019) and a sub-study focusing on experiences during the COVID-19 pandemic (2020). The sample comprised 379 adults aged over 75 living in Cambridge, Newcastle, and Nottingham. Multivariable binary logistic regression was conducted to identify correlates of prevalent loneliness, adjusted for confounding covariates, during the pandemic. The prevalence of loneliness during the pandemic was compared to loneliness in 2018-2019.

RESULTS

Prevalence of loneliness in this sample during the pandemic was 25.1% (95% CI 20.9%-29.7%) compared to 17.2% (95% CI 13.7%-21.3%) in 2018-2019 (χ²  = 14.1, p < 0.01). Variables associated with increased odds of prevalent loneliness included: prior loneliness, living alone, female gender, living in an area of higher deprivation, frequent pre-pandemic social contact at community groups, and separation from family during the pandemic, adjusted for age and sex. Weekly technology-mediated contact using telephone or video calls was associated with lower odds of loneliness.

CONCLUSIONS

COVID-19 recovery plans should address loneliness in older people. Target groups should include those who have previously been lonely, people who live alone, those living in deprived areas, and those who had previously been socially active through community groups.

Health-related heterogeneity in brain aging and associations with longitudinal change in cognitive function

Introduction

Neuroimaging-based 'brain age' can identify individuals with 'advanced' or 'resilient' brain aging. Brain-predicted age difference (brain-PAD) is predictive of cognitive and physical health outcomes. However, it is unknown how individual health and lifestyle factors may modify the relationship between brain-PAD and future cognitive or functional performance. We aimed to identify health-related subgroups of older individuals with resilient or advanced brain-PAD, and determine if membership in these subgroups is differentially associated with changes in cognition and frailty over three to five years.

Methods

Brain-PAD was predicted from T1-weighted images acquired from 326 community-dwelling older adults (73.8 ± 3.6 years, 42.3% female), recruited from the larger ASPREE (ASPirin in Reducing Events in the Elderly) trial. Participants were grouped as having resilient (n=159) or advanced (n=167) brain-PAD, and latent class analysis (LCA) was performed using a set of cognitive, lifestyle, and health measures. We examined associations of class membership with longitudinal change in cognitive function and frailty deficit accumulation index (FI) using linear mixed models adjusted for age, sex and education.

Results

Subgroups of resilient and advanced brain aging were comparable in all characteristics before LCA. Two typically similar latent classes were identified for both subgroups of brain agers: class 1 were characterized by low prevalence of obesity and better physical health and class 2 by poor cardiometabolic, physical and cognitive health. Among resilient brain agers, class 1 was associated with a decrease in cognition, and class 2 with an increase over 5 years, though was a small effect that was equivalent to a 0.04 standard deviation difference per year. No significant class distinctions were evident with FI. For advanced brain agers, there was no evidence of an association between class membership and changes in cognition or FI.

Conclusion

These results demonstrate that the relationship between brain age and cognitive trajectories may be influenced by other health-related factors. In particular, people with age-resilient brains had different trajectories of cognitive change depending on their cognitive and physical health status at baseline. Future predictive models of aging outcomes will likely be aided by considering the mediating or synergistic influence of multiple lifestyle and health indices alongside brain age.

Are social isolation and loneliness associated with cognitive decline in ageing?

Objective

Social isolation and loneliness are associated with poor health (immunity, inflammation, etc.) in ageing. The purpose of this scoping review was to investigate the link between social isolation, loneliness (as distinct constructs, in contrast to previous published work) and cognition in cognitively healthy older adults.

Method

We followed PRISMA-ScR guidelines. Our search, conducted between January 2017 and April 2021, yielded 2,673 articles, of which, twelve longitudinal studies were finally identified as meeting the inclusion criteria. Multiple cognitive functions (short-term and episodic memory, attention, and global cognitive functioning) were measured.

Results

The results showed that both social isolation and loneliness were associated with poor cognition in ageing, with depression as a possible mediator between loneliness and poor cognition. Some studies also suggested that the link between social isolation, loneliness and cognitive decline may be bidirectional.

Conclusion

We conclude that both social isolation and loneliness may have a different impact on cognition. While depression may be an important mediator between loneliness and cognitive decline, the lack of cognitive stimulation may be a greater mediator between social isolation and cognitive health.

Loneliness and Cognitive Function in Older Adults Without Dementia: A Systematic Review and Meta-Analysis

BACKGROUND

Loneliness has been highlighted as a risk factor for dementia. However, the nature of the relationship between loneliness and cognitive function prior to onset of dementia is unclear.

OBJECTIVE

The aim of this systematic review and meta-analysis was to examine the relationship between loneliness and cognitive function in samples screened for dementia at study commencement.

METHODS

Five electronic databases (PubMed, PsycNET, Web of Science, EBSCOhost, Scopus) were searched from inception to August 31, 2021. A narrative review and random-effects meta-analysis were conducted on studies meeting search criteria. PROSPERO registration number: CRD42020155539.

RESULTS

The sixteen studies that met inclusion criteria involved 30,267 individuals, with mean age ranging from 63.0 to 84.9 years. Studies varied in dementia screening criteria, measurement of loneliness and cognitive function, and statistical modeling approach. The narrative review indicated that loneliness was associated with poorer global cognition, episodic memory, working memory, visuospatial function, processing speed, and semantic verbal fluency. Results of the meta-analysis indicated that loneliness was negatively associated with global cognitive function (overall r = -0.08; 95% CI = -0.14, -0.02; n = 6). Due to lack of sufficient data and heterogeneity between studies, we were unable to explore associations with other cognitive domains or longitudinal associations.

CONCLUSION

Loneliness is associated with subtle impairment across multiple cognitive domains in older adults who were screened for dementia. Better characterization of this relationship will provide important information about how loneliness contributes to the clinical and pathological sequalae of AD and be informative for risk reduction and early detection strategies.

Gender differences in the modifying effect of living arrangements on the association of sleep quality with cognitive function among community-dwelling older adults: a cross-sectional study

Background

Sleep quality is considered to be associated with cognitive function for older adults, but little is known about whether living with others can buffer mild cognitive impairment in older adults with poor sleep quality. The objective of this study was to examine the role of living arrangements in sleep quality and cognitive function among older adults aged 65 and over.

Methods

2,859 older adults over 65 years old were selected by using multi-stage stratified sampling method. Cognitive function and sleep quality were measured using Mini-Mental State Examination (MMSE) and Pittsburgh Sleep Quality Index (PSQI). Binary logistic regression was performed to examine the relationship between sleep quality and mild cognitive impairment, and the interaction effects of sleep quality and living arrangements on mild cognitive impairment stratified by gender.

Results

Poor sleep quality was associated with mild cognitive impairment among men and women regardless of living arrangements. The significantly protective role of living with others in reducing the incidence of mild cognitive impairment was found in men with poor sleep quality, but not in women.

Conclusion

Targeted support for older adults with poor sleep quality may be effective in preventing mild cognitive impairment, and gender differences should be taken into account when promoting cohabitations.

A Systematic Literature Review of Loneliness in Community Dwelling Older Adults

Research on loneliness is extensive. This paper presents a systematic review of intervention studies, outlining the antecedents to, and consequences of loneliness in community-dwelling older people. Using PRISMA methodology, a systematic literature review was conducted between January and August 2021 resulting in 49 useable articles. Papers were included if they: (a) investigated older people (+50); (b) were living in community dwellings; (c) had been published in English; (d) had titles or abstracts available and, (e) were published between 2016 and 2021. This study found the antecedents and consequences of social, emotional and existential loneliness differ, however, the vast majority of research has not examined the unique types of loneliness and instead kept loneliness as a generic term, despite the acceptance that various types of loneliness exist. In addition, the findings of intervention studies identified through this review have yielded mixed results. Those interventions focused on improving personal and psycho-social resources for older people fared better outcomes than those focused on technological and social connections alone. This paper reports important implications for the future of research conducted on loneliness and interventions accordingly.

Association between living arrangements and cognitive decline in older adults: A nationally representative longitudinal study in China

Background

Living arrangements are critical to the survival and well-being of older people, especially in China where the filial piety culture demands adult children care for and serve their parents. The study aimed to explore the association between living arrangements and cognitive decline among older people in China.

Methods

Participants included 6,074 older adults over 60 years old (49.65% male, mean age 67.2 years [range 60–98]) from four waves (2011–2018) of the China Health and Retirement Longitudinal Study. Two to four assessments were conducted over a follow-up of an average of 5.3 years (range, 2–7). Cognitive function was assessed using an adapted Chinese version of Mini-Mental State Examination (MMSE). Living arrangements were classified as follows: living alone, living with spouse, living with adult children, living with spouse and adult children and living with others. Multilevel models were used to investigate the relationship between living arrangements and cognitive decline, as well as the gender difference.

Results

As the main type of living arrangements of the study participants (44.91%), living with spouse was taken as the reference group. Compared to the reference group, living alone (β=-0.126, P < 0.001), living with adult children (β=-0.136, P < 0.001), living with spouse and adult children (β=-0.040, P < 0.05) and living with others (β=-0.155, P < 0.05) were all related to a faster rate of cognitive decline. Further, the association between living arrangements and cognitive decline varied by gender. Living alone (β=-0.192, P < 0.001) was associated with a faster cognitive decline only in older men. Living with spouse and adult children (β=-0.053, P < 0.05) and living with others (β=-0.179, P < 0.05) were associated with faster cognitive decline only in older women.

Conclusion

This study suggests that living arrangements in older people in China were associated with cognitive decline, and these associations varied by gender. Greater attention to living arrangements might yield practical implications for preserving the cognitive function of the older population.

Conditions for Feasibility of a Multicomponent Intervention to Reduce Social Isolation and Loneliness in Noninstitutionalized Older Adults

Aims: To identify the factors conditioning the feasibility of an intervention to reduce social isolation and loneliness in noninstitutionalized older adults from the perspective of the intervention agents. Design: A Dimensional Grounded Theory study conducted from December 2019 to January 2020. Methods: Twelve participants were recruited from an experimental study developed in a health district of a southern Spanish city. Data were collected through focus group meetings, individual interviews, biograms, anecdote notebooks, and the field diaries of two participants not included in the other techniques. Transcripts were analyzed using thematic analysis. Findings: Findings were divided into three themes: (a) the elderly between the walls of loneliness, economic difficulties, losses, and the past; (b) intervention agents/volunteers between the walls of inexperience in the management of psychological/emotional processes, lack of moral authority, and difficulty in planning results adapted to the (elderly) person; and (c) intervention between the walls of (interest in) company and assistance at home, lack of involvement (“waiting for you to save them”), and withdrawal/“abandonment”. Conclusion: A profile of the specialized intervention agent, professionalized (or at least a mentored agent), with both technical and relational competencies; a clear understanding of the purposes of the intervention (empowerment, as opposed to having company or being helped with household chores) and the commitment to active participation by the elder; or adequate management of the completion of the intervention (flexibility, attachment management) are some of the main factors contributing to the feasibility of these approaches. Impact: The findings have potential implications in the field of primary healthcare because primary and community healthcare services can implement corrections to the proposed intervention and ensure its effectiveness under feasible conditions. The nurse is shown as the most appropriate profile to conduct this intervention, although more research is needed to analyze the feasibility of this type of intervention in the daily practice of community nurses.

Social Isolation and Incident Dementia in the Oldest-Old-A Competing Risk Analysis

Purpose

Social isolation is considered a risk factor for dementia. However, less is known about social isolation and dementia with respect to competing risk of death, particularly in the oldest-old, who are at highest risk for social isolation, dementia and mortality. Therefore, we aimed to examine these associations in a sample of oldest-old individuals.

Methods

Analyses were based on follow-up (FU) 5-9 of the longitudinal German study AgeCoDe/AgeQualiDe. Social isolation was assessed using the short form of the Lubben Social Network Scale (LSNS-6), with a score ≤ 12 indicating social isolation. Structured interviews were used to identify dementia cases. Competing risk analysis based on the Fine-Gray model was conducted to test the association between social isolation and incident dementia.

Results

Excluding participants with prevalent dementia, n = 1,161 individuals were included. Their mean age was 86.6 (SD = 3.1) years and 67.0% were female. The prevalence of social isolation was 34.7% at FU 5, 9.7% developed dementia and 36.0% died during a mean FU time of 4.3 (SD = 0.4) years. Adjusting for covariates and cumulative mortality risk, social isolation was not significantly associated with incident dementia; neither in the total sample (sHR: 1.07, 95%CI 0.65-1.76, p = 0.80), nor if stratified by sex (men: sHR: 0.71, 95%CI 0.28-1.83, p = 0.48; women: sHR: 1.39, 95%CI 0.77-2.51, p = 0.27).

Conclusion

In contrast to the findings of previous studies, we did not find an association between social isolation and incident dementia in the oldest-old. However, our analysis took into account the competing risk of death and the FU period was rather short. Future studies, especially with longer FU periods and more comprehensive assessment of qualitative social network characteristics (e.g., loneliness and satisfaction with social relationships) may be useful for clarification.

Does Living Alone Affect Self-Perceptions of Aging? Findings From Two Waves of the Health and Retirement Study

The current study examined if living alone is associated with self-perceptions of aging (SPA). The study used two-wave longitudinal data, sampled from the Health and Retirement Study (HRS), and collected in 2014 and 2018. In total, 6506 older adults aged 60–99 years at baseline were followed up with a 4-year lag. Results indicated that there was no significant change in SPA at follow-up regardless of changes in living arrangements. However, at follow-up, there was a significant cross-sectional difference in SPA between older adults who remained in partnership and those who transitioned to living alone due to widowhood or separation/divorce over a 4-year period. Findings suggest that SPA is relatively stable over time and is barely affected by living alone.

The effect of social relationships on cognitive decline in older adults: an updated systematic review and meta-analysis of longitudinal cohort studies

Background

A previous meta-analysis (Kuiper et al., 2016) has shown that multiple aspects of social relationships are associated with cognitive decline in older adults. Yet, results indicated possible bias in estimations of statistical effects due to the heterogeneity of study design and measurements. We have updated this meta-analysis adding all relevant publications from 2012 to 2020 and performed a cumulative meta-analysis to map the evolution of this growing field of research (+80% of studies from 2012-2020 compared to the period considered in the previous meta-analysis).

Methods

Scopus and Web of Science were searched for longitudinal cohort studies examining structural, functional and combined effects of social relationships. We combined Odds Ratios (OR) with 95% confidence intervals (CI) using random effects meta-analysis and assessed sources of heterogeneity and the likelihood of publication bias. The risk of bias was evaluated with the Quality of Prognosis Studies in Systematic Reviews (QUIPS) tool.

Results

The review was prospectively registered on PROSPERO (ID: CRD42019130667). We identified 34 new articles published in 2012-2020. Poor social relationships were associated with cognitive decline with increasing precision of estimates compared to previously reviewed studies [(for structural, 17 articles, OR: 1.11; 95% CI: 1.08; 1.14) (for functional, 16 articles, OR: 1.12; 95% CI: 1.05; 1.20) (for combined, 5 articles, OR: 1.15; 95% CI: 1.06; 1.24)]. Meta-regression, risk and subgroup analyses showed that the precision of estimations improved in recent studies mostly due to increased sample sizes.

Conclusions

Our cumulative meta-analysis would confirm that multiple aspects of social relationships are associated with cognitive decline. Yet, there is still evidence of publication bias and relevant information on study design is often missing, which could lead to an over-estimation of their statistical effects.

Supplementary Information

The online version contains supplementary material available at (10.1186/s12889-022-12567-5).

The Effects of Social Activities and Living Arrangements on Cognitive Functions in Middle-aged and Elderly Adults: A Panel Study Using the 2006-2018 Korean Longitudinal Study of Aging

OBJECTIVES

Previous studies have shown that participation in social activities (SA) can prevent cognitive decline (CD) and that living arrangements (LA) can affect cognitive function. This study aimed to evaluate the effects of SA and LA on CD, as well as their interactions, using longitudinal data.

METHODS

Data were used from the 2006-2018 Korean Longitudinal Study for Aging, which followed 10 254 adults older than 45 years over a 12-year period. CD was defined as a ≥4-point score decrease in the Mini-Mental Status Exam over 2 years. We developed an extended Cox proportional hazards model for time-dependent covariates to estimate the hazard ratio (HR) of CD in 4 groups: (1) socially active and living with others, (2) socially active and living alone, (3) socially inactive and living with others (SILO), and (4) socially inactive and living alone (SILA). The model was stratified by gender and adjusted for important confounders.

RESULTS

The HR of CD was significantly higher in the SILO group in men (HR,1.36; 95% confidence interval [CI], 1.08 to 1.78) and in the SILA group in women (HR, 1.72; 95% CI, 1.08 to 2.75). However, the interaction term for gender was not significant.

CONCLUSIONS

Among socially inactive elderly adults, the HR of CD was elevated in men who lived with others and in women who lived alone, although the interaction term for gender was not significant. Socially inactive men who live with others and socially inactive women who live alone are particularly encouraged to participate in SA to prevent CD.

The interrelationship between social connectedness and social engagement and its relation with cognition: a study using SHARE data

Understanding how psychosocial factors can promote better cognition in mid- and later life is important for making recommendations regarding policies and intervention programmes. This study focuses on two psychosocial aspects (social connectedness and social engagement) in order to assess their independent contribution to explaining cognition, but also how their interrelationship acts on cognition. We hypothesised that each of the factors is positively associated with cognition, but also that a combination of both factors contributes more to cognition than each of the factors independently. Our sample comprises 66,504 individuals who participated in the Survey of Health, Ageing and Retirement in Europe (SHARE). Multilevel linear regression analyses were performed. The results show that higher levels of social engagement and social connectedness are associated with improved cognition. When studying the interaction of social engagement and social connectedness and its association with cognitive function, the analysis shows that better cognitive scores are found in individuals having high levels of both social engagement and social connectedness. Moreover, when one of these aspects is lacking, the other plays a role in cognition protection. This study indicates the importance of social connectedness and social engagement for preserving/developing cognition, which greatly contributes to the quality of life of middle-aged and older adults.

Effectiveness of a community-based integrated service model for older adults living alone: A nonrandomized prospective study

OBJECTIVE

Older adults living alone face physical, emotional, and social health problems, and prefer to age in place (AIP) in their homes. A community-based integrated model for AIP is needed and few studies have identified its impact on older adults living alone.

METHODS

This was a non-randomized prospective study. Participants were 877 community-dwelling older adults living alone, aged above 65 years, in S* city in South Korea. The intervention group (n = 331) received a community-based integrated service (CBIS) model based on AIP for six months from October 2019 to April 2020.

RESULTS

Scores on frailty (β = -0.377, p < .001), loneliness (β = -1.897, p = .018), and health-related quality of life (β = 4.299, p = .021) significantly improved in the intervention group. Among the intervention group, loneliness scores significantly improved among participants aged under 80 years than those aged over 80 years.

CONCLUSION

The CBIS model improved frailty, loneliness, and quality of life in community-dwelling older adults living alone.

Greater Risk of Negative Health Outcomes of Older Adults Living Alone in Vietnam: A Community Survey

In modern Asian societies, there has been a shift in the living arrangements of older adults away from living with others. Knowing the health characteristics of individuals living alone can help identify high-risk groups. This cross-sectional study aimed to describe characteristics of the Vietnamese older adults and to investigate the association between living alone and their reported health outcomes by utilizing survey data of individuals aged ≥60 years in Vietnam in 2018. The community survey included questions about sociodemographic factors, living arrangement, and self-reported physical functional status. Multivariate logistic regression was used to examine whether or not living alone was a predictor of health outcomes. Of 725 study participants, 8.9% lived alone. These participants were more likely to be female, aged 70–79 years, living in rural areas, and currently single or previously married. After adjusting for covariates, older adults who were living alone were more likely to have arthritis (adjusted odds ratio [AOR] = 1.95, 95% confidence interval [CI]: 1.10–3.45), a history of falling (AOR = 2.44, 95% CI: 1.02–5.82), visual difficulties (AOR = 1.89, 95% CI: 1.04–3.41), feelings of loneliness (AOR = 1.95, 95% CI: 1.10–3.47), and high fear of falling (AOR = 1.88, 95% CI: 1.02–3.46). Older adults living alone in Vietnam were at greater risk of negative health consequences than those living with others. Screening and providing adequate social support for this specific population is important in preventing the adverse effects of solitary living among these older adults.

Mediating role of instrumental activities of daily living ability on cognitive function of older adults living alone: A 4-year longitudinal study from the Kasama study

The aim of this study was to clarify the effect of living alone on the cognitive function of older people and the mediating effect of instrumental activities of daily living (IADL) ability.The data for a final sample of 3276 participants aged 65 years and above who did not require long-term care at the baseline were used from a 4-year prospective cohort study conducted in Kasama City, Japan. Demographic data including age, sex, and depression at baseline were used as covariates. The Kihon checklist evaluated the IADL ability at baseline and cognitive function at follow-up. The characteristics of those living alone and with others were compared using the student t test and χ2 test. The effect of living alone on cognitive function was analyzed using logistic regression analysis. Mediation analyses determined the mediating effects of IADL.A total of 325 participants were living alone; they were significantly older than those living with others, more likely to be female, not provide emotional support, and have low physical function, more severe depression, and lower IADL disability. Living alone had a significantly lower risk of cognitive decline at follow-up than living with others. The mediation analysis revealed that IADL disability at follow-up was significantly associated with cognitive decline. Thus, greater IADL ability decreased cognitive decline risk.Older people living alone had a significantly lower risk of cognitive decline, and cognitive function significantly mediated IADL ability. Health support for enhancing IADL abilities may help older people living alone maintain good cognitive function.

Transition of Living Arrangement and Cognitive Impairment Status among Chinese Older Adults: Are They Associated?

Background and Objectives: Living arrangement is a crucial factor for older adults' health. It is even more critical for Chinese older adults due to the tradition of filial piety. With the aging of China's population, the prevalence of cognitive impairment among older adults has increased. This study examines the association between living arrangement transition and cognitive function among Chinese older adults. Materials and Methods: Using three waves of the Chinese Longitudinal Healthy Longevity Survey (CLHLS; 2008-2009, 2011-2012, and 2014), we analyzed data for older adults (age ≥ 65) who lived with other household members and reported good cognitive function or mild cognitive impairment when they participated in the survey. Multistate Cox regression was employed to study changes in cognitive function. Results: Older adults who transitioned to living alone had lower risk of cognitive impairment (hazard ratio (HR) = 0.66, 95% CI: 0.52, 0.83; p < 0.01), compared with those who continued to live with other household members. Moving into an institution was also not associated with cognitive impairment. Conclusions: With older adults' transition to living alone, public health practitioners or social workers might educate them on the benefits of such a living arrangement for cognitive function.

Loneliness may mediate the relationship between depression and the quality of life among elderly with mild cognitive impairment

BACKGROUND

Depression and mild cognitive impairment (MCI) are often comorbid mental health issues in older adults. The current study explored the prospective mediating role of loneliness in the relationship between depression and the quality of life in elderly with MCI. A second aim was to examine differences in depression, loneliness, and the quality of life in the elderly with MCI among gender groups, and type of residence groups.

METHODS

A cross-sectional survey with purposive sampling was used. Older adults with MCI (N = 170) from old age homes in Lahore and Rawalpindi (n = 82) and family residences in Sargodha (n = 88) in Pakistan completed UCLA Loneliness Scale, Depression Anxiety Stress Scale, and Mild Cognitive Impairment Scale.

RESULTS

Most of the participants had severe to extreme depression (98.2%), and moderate to moderately high levels of loneliness (85.3%). Depression was significantly associated with loneliness (b = 0.29, P < 0.05) and poor quality of life in MCI (b = 0.49, P < 0.001). The indirect effect of depression on the quality of life in MCI through loneliness was significant (95% confidence interval (CI) [0.002, 0.156]). However, the indirect effect of quality of life in MCI on depression through loneliness was not significant (95% CI [-0.001, 0.043]). The elderly with MCI living in old age homes had higher depression, loneliness, and poor quality of life. Elderly women had higher levels of depression and poor quality of life, whereas older men were lonelier.

CONCLUSION

The relationship between depression and quality of life in the elderly with MCI may be bidirectional, and loneliness partially mediates only one of these relationships.

Social Networks as A Predictive Factor in Preserving Cognitive Functioning During Aging: A Systematic Review

This study presents a review of the existing literature concerning the relationship between types of social network and cognitive functioning during aging. The primary intent of the study was to identify the nature of this relationship. The study examined relevant literature published between 2008 and 2019 using searches of 4 scientific databases: PubMed, CINAHL, Embase, and PsycINFO. This study identified the relationship between social-network types and cognitive decline. The relationship is influenced by quantitative rather than qualitative variables of social networks, and it was found that associated with cognitive changes in episodic memory, working memory, and processing speed. The mechanism by which social networks influence cognitive function has been unclear. This study identified cognitive-ability variables related to social-network variables that have a major impact on cognitive function.

Who benefits most from resilience-building groups for 'at-risk' older people? a pilot service-evaluation

OBJECTIVES

Resilience-building interventions have not yet targeted older adults, despite the importance of well-being for maintaining independence and health. The 'My Generation' programme aims to build resilience through greater access to social networks, well-being activities, and psycho-educational support; this paper examines service evaluation data from its pilot implementation to identify factors leading to positive outcomes.

METHOD

The 'My Generation' programme comprises eight weekly 2-hour group sessions; each session includes both psychoeducation and a well-being activity. Participants were invited to complete questionnaires at the start and end of the course, and 12 weeks later. These included measures of well-being, loneliness, social connections and self-efficacy.

RESULTS

Baseline assessments were completed by 239 older people (average age 71, range 50-97), attending 38 courses in four centres. Most were female (80%), 40% were widowed, 25% divorced/separated and 64% lived alone. Demographics did not differ between those completing post-intervention assessments (N = 137) and those who did not. Compared with normative data, participants had significantly lower well-being and greater feelings of loneliness than age-peers. Significant improvements in well-being, self-efficacy, social connections and one measure of loneliness were evident at post-intervention and follow-up assessments. Improvement in well-being at post-intervention was greater in those who were divorced/separated and who were not carers, and at follow-up in females and those living alone.

CONCLUSION

The 'My Generation' package appeared effective in improving well-being, self-efficacy, social connections and aspects of loneliness in at-risk older people. More research is needed to identify the intervention's key components and possible between-centre differences in outcomes.

Duration of subjective poverty in relation to subsequent cognitive performance and decline among adults aged ≥64 in China, 2005-2018

BACKGROUND

The effects of late-life subjective poverty on brain health are understudied. We aimed to investigate the association between duration of subjective poverty after age 64 and subsequent cognitive function and decline in China.

METHODS

Data were from 4118 adults aged ≥64 at baseline in the population-based China Longitudinal Healthy Longevity Survey (CLHLS), 2005-2018. The duration of subjective poverty was measured from self-rated economic status relative to neighbors in 2005, 2008, and 2011 (never; one time point; two or three time points). Cognitive function was assessed by the Chinese Mini-Mental State Exam (CMMSE; range: 0-30) in 2011, 2014, and 2018. We fitted attrition-weighted, multivariable mixed-effects Tobit regression models to examine the relationship between duration of subjective poverty from 2005 to 2011 and subsequent cognitive function and decline from 2011 to 2018.

RESULTS

A total of 2675 (64.96%) participants never reported subjective poverty over the period 2005-2011, 930 (22.58%) participants reported subjective poverty at one time point, and 513 (12.46%) reported subjective poverty at two or three time points. Compared to those who never reported subjective poverty, participants experiencing subjective poverty at one time point (β = -0.95, 95% CI: -1.48 to -0.41) and two or three time points (β = -2.01; 95% CI: -2.73 to -1.29) had lower CMMSE scores in 2011, indicating a dose-response relationship. Individuals with a longer duration of subjective poverty had a slower rate of decline in CMMSE scores than those never in subjective poverty (β = 1.44; 95% CI: 0.20 to 2.68 for 2018 X Two or three time points).

CONCLUSION

Subjective poverty in late life may have unique and cumulative contributions to cognitive aging among older adults in China. The lower level of initial cognitive function but slower rate of cognitive decline observed for those with greater subjective poverty is consistent with theories of cognitive reserve and empirical evidence from Western settings on other socioeconomic markers.

Psychosocial risk profiles among older adults living alone in South Korea: A latent profile analysis

OBJECTIVES

This study explored the psychosocial risk profiles and various characteristics associated with profile membership among Korean older adults living alone.

METHODS

Our analyses were based on a cross-sectional cohort of 1030 community-dwelling older adults (≥ 65 years) living alone in one Korean city. Latent profile analysis was used to identify psychosocial risk profiles across a wide range of psychosocial dimensions (depressive symptoms, suicidal ideation, cognitive dysfunction, loneliness, and perceived social support). We then explored the characteristics associated with distinct profiles by conducting bivariate and regression analyses.

RESULTS

The three-profile was selected as the best solution: a group with high cognitive dysfunction, high loneliness, and low social support (profile 1), a group with low psychological risks and high social support (profile 2), and a group with high depression and high suicidal ideation (profile 3). Regression analyses showed that a lower frequency of interaction with neighbors or families, a greater frailty score, and lower quality of life were significantly associated with profile 1 or profile 3 than with profile 2 (p < .05). Further, being male and having a poorer nutritional status was more significantly related to profile 3 than profile 2 (p < .05).

CONCLUSIONS

Findings provide evidence for healthcare professionals when developing interventions to prevent and reduce these psychosocial risks for older individuals living alone. In particular, factors associated with profile membership identified in the study may facilitate more tailored interventions.

Factors Related to Self-Confidence to Live Alone in Community-Dwelling Older Adults: A Cross-Sectional Study

BACKGROUND

Many older adults prefer to live alone in their own homes, with age-related issues in physical movement, regardless of their cultural background. Importantly, however, to identify the features of successfully ageing in place (AIP), and foster independent living among these individuals, this study explored their level of self-confidence to live alone and its related factors.

METHODS

We conducted a cross-sectional study using secondary data from an earlier study with older adults living alone in South Korea recruited by convenience sampling methods (N = 936, mean age = 77.1 years, 76.1% female). Data regarding the general, health-related, and social characteristics as well as self-confidence to live alone were collected via face-to-face interviews in 2019. Self-confidence to live alone was measured with a numeric rating scale of 0 to 10.

RESULTS

The average self-confidence score to live alone was 6.59. A regression analysis showed that mould exposure at home, depression, emergency department visits, and loneliness hinder self-confidence to live alone. Meanwhile, such self-confidence was facilitated by independency in instrumental activities of daily living (IADL), interactions with family members, social service utilisation, and social support.

CONCLUSIONS

This study suggests that healthcare providers need to consider the importance of self-confidence to live alone and influencing functional, mental, social, and environmental factors to promote quality of life as well as successful AIP for older adults living alone. Further, self-confidence to live alone could be a new practical index in the field of health and ageing to screen the successful AIP of older adults living alone.

Depressive Symptoms are Associated with low Serotonin Levels in Plasma but are not 5-HTTLPR Genotype Dependent in Older Adults

Depressive symptoms are diagnosed by physicians using scales but their pathophysiology is unclear. Low serotonin (5-HT) levels play an important role in depression, and the 5-HT transporter (5-HTT) is an important regulator of plasma serotonin levels and reuptake. Additionally, the 5-HTT gene-linked polymorphic region (5-HTTLPR) is associated with depression. The aim was to clarify the roles of plasma serotonin levels in plasma and the 5HTTPLR polymorphism in depressive symptoms in older adults. A total of 84 older adult participants were evaluated. Depressive symptoms were measured using the Center for Epidemiologic Studies Depression Scale of 20 items (CESD-20). The plasma serotonin levels were determined by ELISA, and the 5-HTTLPR genotype was analyzed by PCR. Depressive symptoms were present in 39.3% (N = 33) of the participants. The median plasma serotonin level was 204.34 ng/mL (SD = 93.88). A significant correlation was found between the CESD-20 scale and plasma serotonin levels (r = -.256; p = .019). Low serotonin levels were associated with the presence of depressive symptoms (p = .001). The 5-HTTLPR analysis showed that of the 84 older adults, 35.7% had the SS genotype, 10.7% had the LL genotype, and 53.6% were heterozygous. The 5-HTTLPR polymorphism was not associated with depressive symptoms (p = .587) and plasma serotonin levels (p = 0.391). Depressive symptoms correlate with low serotonin levels in plasma, but not with the 5-HTTLPR polymorphism in older Mexican adults.

Dual Trajectories of Dementia and Social Support in the Mexican-Origin Population

BACKGROUND AND OBJECTIVES

In the next few decades, the number of Mexican American older adults with Alzheimer's disease and related disorders will increase dramatically. Given that this population underutilizes formal care services, the degree of care responsibilities in Mexican American families is likely to increase at the same time. However, little is known about the changing need for assistance with instrumental day-to-day activities and emotional support by long-term patterns of cognitive impairment.

RESEARCH DESIGN AND METHODS

We use 7 waves of the Hispanic Established Populations for the Epidemiologic Studies of the Elderly (1992/1993-2010/2011) and trajectory modeling to describe long-term patterns of perceived emotional and instrumental support, and dementia.

RESULTS

Results revealed 2 latent classes of both emotional and instrumental support trajectories: low and high support. Specifically, those living alone were more likely to belong to the group with low support than to that with high support. Three latent classes for likely dementia were also revealed: likely dementia, increasing impairment, and no impairment. Those living alone were more likely to belong to the increasing impairment and likely dementia groups. The dual trajectory of emotional and instrumental support with likely dementia revealed that the probability of belonging to the low-support group was highest for those with increasing impairment.

DISCUSSION AND IMPLICATIONS

These findings highlight the risk and vulnerability of those who live alone concerning perceived social support and dementia. Implications of the findings for the potential dependency burden on Latino caregivers are discussed.

Leisure activity moderates the relationship between living alone and mental health among Japanese older adults

AIM

As living alone is associated with poor mental health, seeking a moderating factor in this relationship may help enhance quality of life of older people living alone. Therefore, this study examined the moderating effect of leisure activity on the relationship between living alone and mental health in older people.

METHODS

This study employed a cross-sectional analysis of questionnaire data. Research was conducted in a metropolitan Tokyo ward from September to October 2017. Participants were 314 community-dwelling Japanese individuals (158 women, 156 men) aged 70-84 years (mean ± SD, 77.7 ± 4.4). We analyzed mental health using the Japanese version of the World Health Organization-Five Well-Being Index as the outcome variable, and the 11 items of the Leisure Activity Scale and living arrangements as explanatory variables. Multivariate analyses were used to examine effects of leisure activity on living arrangements and mental health.

RESULTS

The proportion of people living alone was 22.9% (N = 72), and the mental health score was mean ± SD, 14.2 ± 7.2. Multiple regression analysis showed that subjective economic status (β = -0.177), instrumental activities of daily living (β = 0.167), living arrangements (β = -0.142) and leisure activity (β = 0.481) were associated with mental health. The interaction effect between living arrangements and leisure activity on mental health was significant (β = 0.112).

CONCLUSIONS

Our findings show that leisure activity moderates poor mental health in older adults living alone. Accordingly, interventions should encourage older adults living alone to engage in leisure activity to improve their mental health. Geriatr Gerontol Int 2021; 21: 421-425.

Social isolation during COVID-19 lockdown impairs cognitive function

Studies examining the effect of social isolation on cognitive function typically involve older adults and/or specialist groups (e.g., expeditions). We considered the effects of COVID‐19‐induced social isolation on cognitive function within a representative sample of the general population. We additionally considered how participants ‘shielding’ due to underlying health complications, or living alone, performed. We predicted that performance would be poorest under strictest, most‐isolating conditions. At five timepoints over 13 weeks, participants (N = 342; aged 18–72 years) completed online tasks measuring attention, memory, decision‐making, time‐estimation, and learning. Participants indicated their mood as ‘lockdown’ was eased. Performance typically improved as opportunities for social contact increased. Interactions between participant sub‐groups and timepoint demonstrated that performance was shaped by individuals' social isolation levels. Social isolation is linked to cognitive decline in the absence of ageing covariates. The impact of social isolation on cognitive function should be considered when implementing prolonged pandemic‐related restrictive conditions.

Effect of the Information Support Robot on the Daily Activity of Older People Living Alone in Actual Living Environment

Information support robots (ISRs) have the potential to assist older people living alone to have an independent life. However, the effects of ISRs on the daily activity, especially the sleep patterns, of older people have not been clarified; moreover, it is unclear whether the effects of ISRs depend on the levels of cognitive function. To investigate these effects, we introduced an ISR into the actual living environment and then quantified induced changes according to the levels of cognitive function. Older people who maintained their cognitive function demonstrated the following behavioral changes after using the ISR: faster wake-up times, reduced sleep duration, and increased amount of activity in the daytime (p < 0.05, r = 0.77; p < 0.05, r = 0.89, and p < 0.1, r = 0.70, respectively). The results suggest that the ISR is beneficial in supporting the independence of older people living alone since living alone is associated with disturbed sleep patterns and low physical activity. The impact of the ISR on daily activity was more remarkable in the subjects with high cognitive function than in those with low cognitive function. These findings suggest that cognitive function is useful information in the ISR adaptation process. The present study has more solid external validity than that of a controlled environment study since it was done in a personal residential space.

Four-year trajectories of episodic memory decline in mid-late life by living arrangements: a cross-national comparison between China and England

BACKGROUND

There is mixed evidence on the association between living arrangements and mid-late life cognition, which may be due to distinct familial arrangements and preferences between populations. To address such heterogeneity, we assessed these associations in China and England.

METHODS

Four-year trajectories of episodic memory scores (0-20, word recall test) by living arrangements (living with partner only, living with partner and children/grandchildren, living with no partner but with children/grandchildren, and living alone) were estimated using latent growth curve modelling for men and women aged 50+ from China (n=12 801) and England (n=10 964).

RESULTS

After adjusting for baseline socioeconomic, health behaviours and health covariates, worse baseline memory was found in Chinese adults living with no partner but with children/grandchildren and in Chinese women living with partner and children/grandchildren, compared with those living with partner only. Better baseline memory was associated with living alone in English women. A faster memory decline was found in Chinese men living with no partner but with children/grandchildren (-0.122 word/year, 95% CI -0.213 to -0.031), as well as in English women living with children/grandchildren with (-0.114, 95% CI -0.180 to -0.049) or without (-0.118, 95% CI -0.209 to -0.026) a partner, and those living alone (-0.075, 95% CI -0.127 to -0.024). No differences at baseline nor over follow-up were found between English men in different living arrangements.

CONCLUSION

Overall, our findings did not confirm the protective effects of co-residence with children/grandchildren, nor the detrimental effects of living alone on mid-late life cognition in China and England.

Typologies of Loneliness, Isolation and Living Alone Are Associated with Psychological Well-Being among Older Adults in Taipei: A Cross-Sectional Study

BACKGROUND

Loneliness, isolation, and living alone are emerging as critical issues in older people's health and well-being, but the effects are not consistent. The purpose of this study was to examine the clustering of loneliness, isolation, and living alone, the risk factors and the associations with psychological well-being.

METHODS

The data were collected from the 2019 Taipei City Senior Citizen Condition Survey by face-to-face interviews and included a community-based sample (n = 3553). Loneliness, isolation, and living arrangement were analyzed by cluster analysis to define Loneliness-Isolation-Living-Alone clusters. Multinomial logistic regression was used to examine the factors related to Loneliness-Isolation-Living-Alone clusters, and linear regression was used to examine association of clusters with psychological well-being.

RESULTS

Five clusters of older adults were identified and named as follows: Not Lonely-Connected-Others (53.4%), Not Lonely-Isolated-Others (26.6%), Not Lonely-Alone (5.0%), Lonely-Connected (8.1%), and Lonely-Isolated-Others (6.9%). Demographics, financial satisfaction, physical function, family relationship, and social participation were related to the Loneliness-Isolation-Living-Alone clusters. Compared with the Not Lonely-Connected-Others cluster, the Lonely-Connected cluster and Lonely-Isolated-Others cluster had higher depressive symptoms and lower life satisfaction, and the Not Lonely-Isolated-Others cluster reported lower life satisfaction; the Not Lonely-Alone cluster was not different.

DISCUSSION

Loneliness and isolation are negatively associated with psychological well-being, and living arrangement is not the determinant to loneliness or isolation. Older adults are suggested to strengthen their informal social support, and the government may encourage social care and create an age friendly environment to reduce loneliness and isolation.