Widowhood and cognitive decline in adults aged 50 and over: A systematic review and meta-analysis

Spousal bereavement and its effects on later life physical and cognitive capability: the Tromsø study

Spousal bereavement is associated with health declines and increased mortality risk, but its specific impact on physical and cognitive capabilities is less studied. A historical cohort study design was applied including married Tromsø study participants (N=5739) aged 50-70 years with baseline self-reported overall health and health-related factors and measured capability (grip strength, finger tapping, digit symbol coding, and short-term recall) at follow-up. Participants had data from Tromsø4 (1994-1995) and Tromsø5 (2001), or Tromsø6 (2007-2008) and Tromsø7 (2015-2016). Propensity score matching, adjusted for baseline confounders (and baseline capability in a subset), was used to investigate whether spousal bereavement was associated with poorer subsequent capability. Spousal bereavement occurred for 6.2% on average 3.7 years (SD 2.0) before the capability assessment. There were no significant bereavement effects on subsequent grip strength, immediate recall, or finger-tapping speed. Without adjustment for baseline digit symbol coding test performance, there was a negative significant effect on the digit symbol coding test (ATT -1.33; 95% confidence interval -2.57, -0.10), but when baseline digit symbol coding test performance was taken into account in a smaller subsample, using the same set of matching confounders, there was no longer any association (in the subsample ATT changed from -1.29 (95% CI -3.38, 0.80) to -0.04 (95% CI -1.83, 1.75). The results in our study suggest that spousal bereavement does not have long-term effects on the intrinsic capacity components physical or cognition capability to a notable degree.

Estimating the Sex Gap in Depression-Free Life Expectancy Among Widowed Americans Aged 50 and Older: An Application Using the Interpolated Markov Chain Approach

OBJECTIVES

Using Interpolated Markov Chain software, we compare the length of life with and without depression among married individuals and widowers, and the related sex differences.

METHODS

We applied a multi-state life table approach to estimate depression-free life expectancy among recent cohorts of older married and widowed women and men in the United States, using data from the Health and Retirement Study over a 7-year period (2012-2018).

RESULTS

The study revealed that the difference in life expectancy between sexes widens in the context of widowhood. At age 50, the sex gap in depression-free life expectancy is 0.8 years among married people, whereas the gap almost doubles to 1.7 years among widowed people.

DISCUSSION

By quantifying disparities in the duration of life affected by depression between married and widowed women and men, policymakers could properly allocate resources specifically to address the mental health needs of these groups.

Widowhood and bereavement in late life

Bereavement is a common and often challenging experience in late life. Evidence shows that while many older adults manage to adjust well and demonstrate resilience in response to the death of a close person, bereavement puts a substantial minority at risk of adverse mental and physical health impacts including mortality. Current research further indicates that 1) this is the case across different countries and cultures across the globe; 2) that the COVID-19 pandemic posed unprecedented challenges for coping with late-life bereavement; 3) that loneliness and social isolation among bereaved older adults tend to be prevalent and harmful, particularly under pandemic but also in nonpandemic circumstances; and, recently, 4) that bereavement may be a risk factor for cognitive decline in this population.

Examining sociocultural factors in widowhood and cognitive function among older Chinese immigrants: findings from the PINE study

Objectives: Although there is growing evidence on widowhood and cognitive function, existing studies have shown mixed results. Little is known about protective factors that may contribute to resilience, thereby ameliorate the adverse effect of widowhood on cognition among older Asian immigrants. This study explored potential moderators (i.e. social support, acculturation, leisure activities) in the association between widowhood and cognitive function among older Chinese immigrants.Method: The study sample included 2,515 adults aged 60 or older who completed two waves (2011-2013 and 2013-2015) of the Population Study of Chinese Elderly in Chicago. Cognitive function was indexed by global cognitive function and episodic memory. Linear regression analyses were conducted with interaction terms.Results: Our results show that social support moderated the relationship between widowhood and global cognitive function, and acculturation moderated the relationship between widowhood and episodic memory. The adverse effect of widowhood on cognitive function was more pronounced at lower levels of social support and acculturation.Conclusion: Our findings indicate buffering roles of social support and acculturation in cognitive health among older Chinese immigrants who experience widowhood. Providing supportive programs and interventions to increase social support and acculturation is suggested to promote cognitive function in this population.

Attentional bias during acute grief predicts clinical outcome in suicide-related bereavement

BACKGROUND

Individuals who have lost a loved one to suicide are at increased risk for developing complicated grief (CG). It is unclear why only a subgroup of bereaved develops pathological forms of grief. Vulnerability may be related to the ability to regulate attention toward reminders of the deceased during the acute phase of grief. Using a longitudinal design, we determined whether loss-related attentional bias during acute grief predicts grief severity one year later.

METHODS

Thirty-seven participants grieving a first-degree relative or partner to suicide in the prior 6 months performed an emotional Stroop task using words related to the deceased, a living attachment figure, living non-attachment figure, and color congruent Stroop to quantify related attentional bias during the acute grief period. Clinical interviews were conducted at baseline (N = 37) and one year later (N = 35).

RESULTS

Participants showed greater attentional bias to deceased-related word trials compared with living attachment, non-attachment, and congruent trials, controlling for age, time since loss, depression, and psychiatric medication. A greater reduction in grief severity over time was associated with more deceased-related attentional bias at baseline. Self-reported grief avoidance was related to deceased-related attentional bias, with lower avoidance scores associated with greater bias.

LIMITATIONS

Lack of non-suicide grief control and small sample size.

CONCLUSIONS

Less deceased-related bias following the loss may hinder the transition from acute to integrated grief and result in poorer grief trajectories.

Positive psychological constructs and cognitive function: A systematic review and meta-analysis

AIM

To synthesise evidence regarding the association between positive psychological constructs (PPCs) and cognitive function in adults aged 50 +.

METHODS

Literature searches: Medline, PsycINFO, and Scopus (inception to February 2022). Studies were included if they reported on the association between at least one PPC and one objective measure of cognitive function in people aged 50 + without cognitive impairment at baseline. Where at least two studies reported on the same PPC and cognitive outcome, estimates were pooled through meta-analysis.

FINDINGS

In total, 37 studies were included. There was evidence of cross-sectional associations for 'meaning in life' (verbal fluency: b = 0.09, 95 %CI [0.07, 0.11], p < .001; memory: b = 0.10, 95 %CI [0.08, 0.12], p < .001), 'purpose in life' (verbal fluency: b = 0.07, 95 %CI [0.05, 0.08], p < .001; memory: r = 0.13, 95 %CI [0.08, 0.18], p < .001), and positive affect (cognitive state: r = 0.25, 95 %CI [0.14, 0.36], p < .001; memory: r = 0.05, 95 %CI [0.02, 0.08], p < .001) with various domains of cognitive function. However, no significant results were found for life satisfaction (p = .13) or longitudinal studies investigating positive affect and memory (p = .48). Other PPCs were included in narrative syntheses only.

IMPLICATIONS

Purpose and meaning in life may be sensible primary targets for interventions to promote healthy cognitive aging. More longitudinal and causal inference research is needed to better understand this association and its implications for clinical practice.

Can the internet mitigate the negative effect of widowhood on Quality of Life? A gender analysis

Widowhood often reduces the Quality of Life of individuals of advanced ages by negatively affecting their social network ties. Yet conversely, the Internet has also created new opportunities for communication and interaction, thus contributing to improved Quality of Life. This research analyses the role of the Internet in the relationship between widowhood and Quality of Life from a gender perspective.

This study focuses on 31,814 individuals aged 65 or over residing in 17 European countries who participated in Wave 6 of SHARE – the Survey of Health, Ageing and Retirement in Europe.

The linear regression analyses highlighted that the role of the Internet in the relationship between widowhood and Quality of Life varies according to gender. More specifically, in Europe, the Quality of Life for widowed women aged 65+ using the Internet is .414 higher (CI=.006 to .0822) than widows who do not use the Internet and married women or women in a de facto relationship whether or not they use the Internet. The results have relevant implications for the development of social policies and suggest a need to develop digital inclusion projects targeting older people, particularly widows, to help promote their Quality of Life.

Incidence of potentially disruptive medical and social events in older adults with and without dementia

BACKGROUND

Potentially disruptive medical, surgical, and social events-such as pneumonia, hip fracture, and widowhood-may accelerate the trajectory of decline and impact caregiving needs in older adults, especially among people with dementia (PWD). Prior research has focused primarily on nursing home residents with dementia. We sought to assess the incidence of potentially disruptive events in community-dwelling people with and without dementia.

METHODS

Retrospective cohort study of participants aged 65+ enrolled in the Health and Retirement Study between 2010 and 2018 (n = 9346), including a subset who were married-partnered at baseline (n = 5105). Dementia was defined with a previously validated algorithm. We calculated age-adjusted and gender-stratified incidence per 1000 person-years and incidence rate ratios of: 1) hospitalization for pneumonia, 2) hip fracture, and 3) widowhood in people with and without dementia.

RESULTS

PWD (n = 596) were older (mean age 84 vs. 75) and a higher proportion were female (67% vs. 57%) than people without dementia (PWoD) (n = 8750). Age-adjusted incidence rates (per 1000 person-years) of pneumonia were higher in PWD (113.1; 95% CI 94.3, 131.9) compared to PWoD (62.1; 95% CI 54.7, 69.5), as were hip fractures (12.3; 95% CI 9.1, 15.6 for PWD compared to 8.1; 95% CI 6.9, 9.2 in PWoD). Point estimates of widowhood incidence were slightly higher for PWD (25.3; 95% CI 20.1, 30.5) compared to PWoD (21.9; 95% CI 20.3, 23.5), but differences were not statistically significant. The association of dementia with hip fracture-but not pneumonia or widowhood-was modified by gender (male incidence rate ratio [IRR] 2.24, 95% CI 1.34, 3.75 versus female IRR 1.31 95% CI 0.92,1.86); interaction term p = 0.02).

CONCLUSIONS

Compared to PWoD, community-dwelling PWD had higher rates of pneumonia and hip fracture, but not widowhood. Knowing how often PWD experience these events can aid in anticipatory guidance and care planning for this growing population.

Positive psychological constructs and association with reduced risk of mild cognitive impairment and dementia in older adults: A systematic review and meta-analysis

Understanding factors associated with dementia risk is important for informing future interventions aimed at dementia prevention. There is accumulating evidence for the association between depression and risk of dementia, however less is known about the association between positive psychological factors and dementia incidence. This review aims to synthesise evidence regarding the association between positive psychological constructs (PPCs) and later risk of MCI and dementia in adults aged 50 and over. Literature searches were conducted in Medline, PsycINFO, and Scopus until March 2021. Papers reporting on the association between at least one PPC and later risk of MCI or dementia in people aged 50 + without cognitive impairment at baseline were included. Results from the meta-analyses revealed that purpose in life was significantly associated with a reduced risk of dementia (HR = 0.81, 95% CI [0.78, 0.85], p < .001), however results for positive affect were non-significant (HR = 0.94, 95% CI [0.76, 1.15], p = .54). Results for other PPCs are described narratively. Mixed findings for different PPCs highlight the importance of investigating these factors individually. Understanding which factors may play a protective role in their association with risk of mild cognitive impairment and dementia could have important implications for informing dementia prevention interventions.