prospective cohort study · n=1,992
Sleep Regularity and Cardiometabolic Risk: The Multi-Ethnic Study of Atherosclerosis
Journal of the American College of Cardiology · 2020
Open PubMed recordDOI 10.1016/j.jacc.2019.11.054timing
Only total hours matter
Grade B · ModerateHuman reviewed
What people say
“As long as I get enough hours, my sleep timing can be completely different every day.”
What the evidence says
Grade B · ModerateLarge observational research links irregular sleep timing with adverse health outcomes. It cannot prove timing irregularity caused those outcomes, but it suggests regularity is more than an aesthetic goal.
Research record
What this verdict is based on
Sources are linked for inspection. Study results are summarized for general information, not personal medical direction.