Heterogeneous Trajectories of Physical and Mental Health in Late Middle Age: Importance of Life-Course Socioeconomic Positions

Individual-level socioeconomic status and cataract-induced visual disability among older adults in China: the overview and urban-rural difference

Objective

To investigate the prevalence of cataract-induced visual disability and its association with individual-level socioeconomic status (SES) among older adults in China.

Methods

Using the data of 354,743 older adults (60 years and older) from the Second China National Sample Survey on Disability in 2006. Cross-sectional study design was applied. The differences in visual disability prevalence of cataracts among sociodemographic subgroups were analyzed by the chi-square test, and the association between individual-level SES and cataract-induced visual disability was investigated by the multivariate logistic regression model.

Results

The weighted visual disability prevalence of cataracts was 4.84% in 2006. Older people with a higher household income per capita (OR = 0.83, 95% CI: 0.81-0.85), higher education level (primary school vs. illiteracy: OR = 0.80, 95% CI: 0.76-0.83; ≥undergraduate college vs. illiteracy: OR = 0.31, 95% CI: 0.25-0.39), and occupation (OR = 0.53, 95% CI: 0.50-0.56) were less likely to suffer from cataract-induced visual disability. Household income per capita and education level increase played a greater role in decreasing the risk of visual disability caused by cataracts in urban areas, while having occupation contributed more to reducing the risk of disability in rural areas.

Conclusion

The gap in individual-level SES is closely related to the visual health inequities among older Chinese people and there are two distinct mechanisms in rural and urban areas. Strategies to promote collaborative healthcare development regionally, strengthen safeguards for disadvantaged groups, and increase public awareness of visual disability prevention are warranted.

Impact of Endometriosis on Life-Course Potential: A Narrative Review

Endometriosis may exert a profound negative influence on the lives of individuals with the disorder, adversely affecting quality of life, participation in daily and social activities, physical and sexual functioning, relationships, educational and work productivity, mental health, and well-being. Over the course of a lifetime, these daily challenges may translate into limitations in achieving life goals such as pursuing or completing educational opportunities; making career choices or advancing in a chosen career; forming stable, fulfilling relationships; or starting a family, all of which ultimately alter one's life trajectory. The potential for endometriosis to impact the life course is considerable, as symptom onset generally occurs at a time of life (menarche through menopause, adolescence through middle age) when multiple life-changing and trajectory-defining decisions are made. Using a life-course approach, we examine how the known effects of endometriosis on life-domain satisfaction may impact health and well-being across the life course of affected individuals. We provide a quasi-systematic, narrative review of the literature as well as expert opinion on recommendations for clinical management and future research directions.

Highways to Ageing - Linking life course SEP to multivariate trajectories of health outcomes in older adults

OBJECTIVES

Ageing is a temporal, multi-faceted process subject to interacting factors. In this study, we used life course and multidimensional approaches to elucidate the association between socioeconomic forces across a lifetime and the developmental origins in health and disease of the Mexican elderly.

METHODS

Data stemmed from the Mexican Health and Ageing Study, constituting a sample of older adults (N= 5169, ≥50 years). With retrospective information on early, intermediary and contemporaneous socioeconomic indicators, life course typologies of socioeconomic position were identified using Latent Class Analysis. Based on prospective data of functional mobility, number of chronic conditions and self-rated health, multivariate trajectories of health outcomes were uncovered with Group Based Trajectory Model. Links between the extracted SEP and multivariate health latent constructs were explored with multinomial logistic regression.

RESULTS

Life course SEP classes were heterogeneous, yet a large proportion of subjects was characterized by persistent socioeconomic adversity throughout life. The health outcomes' patterns of co-evolution were diverse too, shedding light on the nature of their developmental links, while revealing variable synchronicity in their temporal decline. A graded association was observed between the life course SEP classes and ageing trajectories.

CONCLUSION

The results primarily backed the cumulative advantage/disadvantage life course framework, while finding some indication for age as a leveller hypothesis. Variability in patterns of dynamic co-action among the health outcomes depicts ageing as a naturally variable process of interconnected changes. Life course evidence for the ways socio-economic forces are differentially linked to distinct developmental profiles of ageing is provided.

The Effect of California's Paid Family Leave Program on Employment Among Middle-Aged Female Caregivers

BACKGROUND AND OBJECTIVES

This study examined the effect of a Paid Family Leave program in California (CA-PFL) on employment among middle-aged female caregivers. We also examined differences in the relationship between the availability of paid family leave (PFL) and employment in socioeconomic subgroups of midlife women.

RESEARCH DESIGN AND METHODS

Data came from multiple years (2000‒2014) of the Current Population Survey (CPS) (N = 68,773 individuals). Applying a Difference in Differences (DiD) approach to removing potential selection biases related to program participation, we used a logistic regression to estimate the effects of PFL.

RESULTS

There was a significant increase in the likelihood of working based on CA-PFL. This positive effect, however, was found only among the early middle-aged, the near-poor, and those had the highest level of education.

DISCUSSION AND IMPLICATIONS

Among the late middle-aged, caregiving burden may not affect decisions on whether to exit the labor market, and PFL may not significantly mitigate the well-known negative effects of intense and multiple caregiving roles (parents, spouse, and/or children with disabilities). Future studies should examine PFL effects and their correlates such as age-cohorts, caregiving intensity, and retirement patterns. The unexpected null findings of CA-PFL's effect on employment outcomes for the poor and those with low education levels suggests these vulnerable groups might not be able to fully benefit from the originally intended goal of the policy, instead being left more vulnerable compared to the near poor. Such a possibility increases the importance of focused research and policymaking attention for this group.

Does social capital and a healthier lifestyle increase mental health resilience to disability acquisition? Group-based discrete trajectory mixture models of pre-post longitudinal data

Poor mental health is strongly associated with disability acquisition. Social capital and healthier lifestyles pre-disability onset may help promote mental health resilience (i.e. a state of seemingly being unaffected by the event), or the capacity to 'bounce back', post-acquisition. This paper used a novel methodology (discrete trajectory mixture models) to examine discrete trajectories in mental health before and after disability acquisition in the Household Income Labour Dynamics in Australia (HILDA) survey. Group membership in association with pre-onset social capital and healthy lifestyles were then examined using multinomial logistic regressions. Four discrete trajectory groups were identified in 2904 Australians reporting onset of ongoing disability, with about 28.4% demonstrating mental health resilience. Three other groups were identified, each demonstrating increasingly severe reductions in mental health. No clear 'bounce back' group was observed. Group membership was associated with participants who felt they had 'no-help from others' prior to disability acquisition. Pre-disability acquisition measures of social capital and unhealthy behaviours moderated the association between disability acquisition and mental health trajectories. Social capital was protective only for the respondents who had poorer mental health before disability onset and had less resilience after onset, and long working hours and less resilience were positively associated. Public policies that help to enhance levels of social capital and reduce unhealthy behaviours at a population level may help to promote mental health resilience to adversities such as the acquisition of disability.

Confounding and Statistical Significance of Indirect Effects: Childhood Adversity, Education, Smoking, and Anxious and Depressive Symptomatology

The life course perspective, the risky families model, and stress-and-coping models provide the rationale for assessing the role of smoking as a mediator in the association between childhood adversity and anxious and depressive symptomatology (ADS) in adulthood. However, no previous study has assessed the independent mediating role of smoking in the association between childhood adversity and ADS in adulthood. Moreover, the importance of mediator-response confounding variables has rarely been demonstrated empirically in social and psychiatric epidemiology. The aim of this paper was to (i) assess the mediating role of smoking in adulthood in the association between childhood adversity and ADS in adulthood, and (ii) assess the change in estimates due to different mediator-response confounding factors (education, alcohol intake, and social support). The present analysis used data collected from 1994 to 2008 within the framework of the Tromsø Study (N = 4,530), a representative prospective cohort study of men and women. Seven childhood adversities (low mother's education, low father's education, low financial conditions, exposure to passive smoke, psychological abuse, physical abuse, and substance abuse distress) were used to create a childhood adversity score. Smoking status was measured at a mean age of 54.7 years (Tromsø IV), and ADS in adulthood was measured at a mean age of 61.7 years (Tromsø V). Mediation analysis was used to assess the indirect effect and the proportion of mediated effect (%) of childhood adversity on ADS in adulthood via smoking in adulthood. The test-retest reliability of smoking was good (Kappa: 0.67, 95% CI: 0.63; 0.71) in this sample. Childhood adversity was associated with a 10% increased risk of smoking in adulthood (Relative risk: 1.10, 95% CI: 1.03; 1.18), and both childhood adversity and smoking in adulthood were associated with greater levels of ADS in adulthood (p < 0.001). Smoking in adulthood did not significantly mediate the association between childhood adversity and ADS in adulthood. However, when education was excluded as a mediator-response confounding variable, the indirect effect of childhood adversity on ADS in adulthood was statistically significant (p < 0.05). This study shows that a careful inclusion of potential confounding variables is important when assessing mediation.