Longitudinal associations between marital quality and sleep quality in older adulthood.

The current study examined how changes in marital quality are associated with changes in sleep quality in older adults over an 8-year period. Older adults from the Health and Retirement Study completed measures of both marital support/strain and sleep quality in 2006, 2010, and 2014 (N = 4981). We used latent growth curve models to examine intraindividual change in support, strain, and sleep quality. Further, we examined interrelationships between changes in each of these three indicators. Results showed that higher marital quality was associated with better sleep at baseline. We also found that marital quality and sleep quality were coordinated over time-as marital quality increased, so did sleep quality. When this covariation was accounted, the prospective effects of baseline marital quality on changes in sleep quality were not found. The current study provided evidence for a long-term temporal coordination of marital quality and sleep quality in older adults.