People who tend to go to bed and wake up earlier have significantly lower risk of major depression, according to a sweeping new genetic study published May 26 in JAMA Psychiatry.
The study examined data from more than of 840,000 people and was conducted by researchers at University of Colorado Boulder and the Broad Institute of MIT and Harvard. It represents some of the strongest evidence yet that chronotype—a person’s propensity to sleep at a certain time —influences depression risk.
"We have known for some time that there is a relationship between sleep timing and mood, but a question we often hear from clinicians is: How much earlier do we need to shift people to see a benefit? We found that even one-hour earlier sleep timing is associated with significantly lower risk of depression."
- Céline Vetter, assistant professor of integrative physiology
- Chronic disease epidemiology
- Circadian rhythms and sleep disruption
- Light exposure
- Shift work, work hours, and occupational health
- See also more information at Circadian and Sleep Epidemiology Laboratory (CASEL)