Structural and Cognitive Social Capital of Older Korean Adults and Their Relationship with Depression Trajectories: Latent Class and Growth Curve Analyses.

This study examined whether the identified latent classes of structural and cognitive social capital are differently associated with depression trajectories in older Korean adults. From the five waves (2006, 2009, 2012, 2015, and 2018) of the Korean Welfare Panel Study, 3,606 participants aged ≥65 were analyzed. The latent class analysis identifies structural and cognitive social capital subgroups. Latent growth curve analysis examined the latent classes' effect on depression trajectories. Three classes were identified: medium-structural and high-cognitive (Class 1), high-structural and cognitive (Class 2), and low-structural and cognitive (Class 3). Classes 1 and 2 showed lower depression at baseline; however, the trajectory change rate was opposite than Class 3. Compared to Classes 1 and 2, depression was highest at baseline but with a slower change rate in Class 3. Therefore, it is important to identify older adults' structural and cognitive social capital classes to depression trajectories.