Determinants of psychosocial factors amongst the oldest old: Longitudinal evidence based on the representative "survey on quality of life and subjective well-being of the very old in North Rhine-Westphalia".

This longitudinal study enhanced our understanding of the factors contributing to poorer psychosocial outcomes among the oldest old. Efforts to avoid or postpone functional impairment may contribute to more favorable psychosocial outcomes. Moreover, our current study underlines the importance of spousal relationships for psychosocial outcomes in the oldest age group.