Mental health impacts of spousal caregiving intensity in the US.

In the US, spouses are a major source of informal care for older adults and, therefore, key to the US national strategy to provide long-term care to the growing population of older adults. Understanding the mental health impacts of spousal caregiving is therefore critically important. Existing studies on the topic have often been limited by methodological limitations, and most overlook the role of caregiving intensity. In this study, we assess the impact of providing different intensities of caregiving to a spouse on mental health outcomes using data from the Health and Retirement Study. We address the endogeneity of the decision to provide different caregiving intensities using an augmented inverse probability weighted (AIPW) estimator adapted to handle multivalued treatments. We check the robustness of our estimates to the AIPW's identifying assumptions by re-estimating the model using a dynamic fixed effects estimator. We find strong evidence that becoming a caregiver is associated with worsened mental health outcomes for women, while the evidence for men is weaker. When disaggregating by caregiving intensity, we find that transitions into high-intensity caregiving lead to large increases in depression symptoms and the probability of exhibiting major depression for both men and women. The overall mental health impact of transiting into caregiving is driven almost exclusively by the negative impact of high-intensity caregiving, as transitions into low- and moderate-intensity caregiving are not associated with worsening mental health in most specifications. This study provides timely insights that can inform the targeting of long-term care policies and programs aimed at supporting family caregivers of older adults.