Compositional and contextual associations of social capital and self-rated health in Seoul, South Korea: A multilevel analysis of longitudinal evidence

► The longitudinal associations between individual and contextual levels of social capital and self-rated health were examined. ► Individual level perceived helpfulness and organizational participation were positively associated with self-rated health. ► None of the area level variables including social capital and socioeconomic deprivation were associated with self-rated health. ► The relatively large size of the administrative-area may hinder finding the significant associations at this level.