Social participation and mental well-being: Does purpose in life mediate the association among older adults?

Objectives We investigated the association of social participation with mental well-being among older people and whether purpose in life mediates the potential association. Method Cross-sectional (n = 1014) and longitudinal (n = 660, four-year follow-up) data comprised of three age cohorts (75, 80, and 85 years) of community-dwelling people. Life satisfaction was measured with the Satisfaction with Life Scale, depressive symptoms with the Centre for Epidemiologic Studies Depression Scale, and purpose in life with the Scales of Psychological Well-Being purpose in life subscale. Social participation was assessed with questions concerning the frequency of meeting close friends and acquaintances, and volunteering. The data were analyzed using structural equation modeling. Results Higher social participation was associated with higher life satisfaction and fewer depressive symptoms both cross-sectionally and after a four-year follow-up. Higher purpose in life mediated the associations of more social participation with higher life satisfaction and fewer depressive symptoms cross-sectionally. In the longitudinal data, the mediation effect was not observed. Conclusion Older people with frequent social participation who had a sense of purpose in their lives will likely have higher mental well-being than those with less social participation. Enabling and supporting them to conduct purposeful actions in social contexts may help maintain their mental well-being.