The study found that higher levels of insolation were associated with better cognitive function, as measured by the DSST and MoCA. Specifically, the study found that a 100-unit increase in insolation was associated with a 0.12-point increase in DSST score and a 0.05-point increase in MoCA score.
The researchers analyzed the relationship between insolation, a measure of sunlight exposure, and cognitive function, as measured by the Digit Symbol Substitution Test (DSST) and the Montreal Cognitive Assessment (MoCA). The study used data from the REasons for Geographic and Racial Differences in Stroke (REGARDS) cohort, which includes over 30,000 participants from across the United States.