Abstract
The purpose of this paper was to examine the longitudinal changes in socioeconomic levels, the number of chronic diseases, instrumental activities of daily living (iADL), and depression among the elderly. The 6th (2016), 7th (2018), and 8th (2020) basic surveys of the Korean Longitudinal Study of Aging (KLoSA) were used in the paper. The research hypotheses were supported through latent growth curve modeling. The results showed longitudinal changes in depression among the elderly. It was found that socioeconomic levels, the number of chronic diseases, and iADL had a significant effect on the intercept and slope of depression in the elderly, when socioeconomic levels affected depression, the number of chronic diseases and iADL showed mediating effects. Additionally, iADL had a mediating effect on the relationship between the number of chronic diseases and depression. Finally, the implications, limitations, and directions for future studies were discussed.
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