Why is the composition of older adults' care network associated with psychological wellbeing: an application of the self-determination theory.

Objectives: Older care recipients have different types of care networks, varying from spouse-only to large mixed care networks, that add to different levels of wellbeing. Applying Self-Determination Theory (SDT) to the care context, we argue that the care network composition may foster or hamper the three basic needs for wellbeing: relatedness, autonomy and competence.

Method: Data are from ten observations between 1992 and 2022 of the Longitudinal Aging Study Amsterdam (N = 18,434 observations from 4,837 older Dutch adults). Five care network types are used: no care, partner, informal, formal or privately paid care. Mixed-hybrid-multilevel regression analysis of depressive symptoms as measure of wellbeing is applied on care network type and loneliness, mastery and care sufficiency as indicators of the three basic needs for wellbeing.

Results: Receiving care from a partner care network is, compared to the formal care network, the most negatively associated with depressive symptoms, followed by informal care and privately paid care. Differences in care network types existed in loneliness and care sufficiency, but not in mastery, and in part explained the association between care network types and depressive symptoms. Results of between and within effects are comparable.

Conclusion: Using a rich data set and advanced methodology support the hypotheses that formal care networks hamper wellbeing due to insufficient care and increased loneliness, in particular compared to partner and informal care. The role of mastery was less important, possibly because it does not measure care related level of control.