Leisure activities and cognitive impairment in old age: The role of life course socioeconomic status.

In the current literature on cognitive function, life course socioeconomic status (SES) and engaging in leisure activities are often viewed as parallel measures of cognitive reserve that independently affect cognitive impairment in old age. Some studies also suggest that leisure activity mediates the effect of SES on cognitive impairment. What is less examined is the modification effect of SES on the association between engaging in leisure activities and cognitive impairment, especially from a life course perspective. In this study, we focus on the interaction effects of specific measures of SES and leisure activities on cognitive impairment. We use data from the Chinese Longitudinal Healthy Longevity Survey, which includes five waves of interviews with adults aged 65 and older between 2002 and 2014. Cognitive impairment is measured by the Chinese version of the Mini-Mental Status Examination. Childhood and adulthood SES and participation in seven leisure activities are included in this analysis. We adopt a lagged independent variable approach and the Generalized Linear Mixed Model to conduct the analysis. Findings confirm that higher SES in both childhood and adulthood are associated with low levels of cognitive impairment in the older Chinese population. Furthermore, there are significant interaction effects between specific life course SES and leisure activities with a consistent pattern: Those of higher life course SES enjoy extra benefits from engaging in leisure activities. The findings point to a modification mechanism that connects life course SES, leisure activities, and cognitive health inequality among older adults. [ABSTRACT FROM AUTHOR]