Low education and mental health among older adults: the mediating role of employment and income

Transition from work to retirement may be associated with poor mental health outcomes in older-age groups, especially among those of lower socio-economic position (SEP). This study investigates the association between low educational achievement and mental health status, and the mediating role of employment status and income level among older-age Australians. This study was based on the ‘45 and Up Study’, a prospective cohort study of participants from New South Wales (Australia) aged 45 years and older (N = 267,153), followed-up over the period 2006–2018. A causal mediation analysis was used to assess the total causal effect (TCE) of educational achievement level on psychological distress, and the extent of mediation by employment status and income level. Lower educational achievement was associated with subsequent psychological distress, with a stronger TCE among those with low educational achievement (OR = 1.46, 95% CI 1.25–1.72), followed by those with intermediate educational achievement (OR = 1.26, 95% CI 1.07–1.48), compared to those with high educational achievement. In models investigating mediation by employment status and income level, 44.7%, (95% CI 34.2–55.3) of the association was mediated by employment status and income level, with a stronger mediating effect evident for income level. Findings suggest that employment status and income level changes at older age are more strongly associated with poorer mental health among those of lower SEP. Poor mental health associated with lower SEP may be ameliorated particularly by changes to income level, but also how people transition from employment to retirement.