Nighttime sleep 8-10 h

Nighttime sleep 8-10 h raises the risk of mortality in humans (HR 3.095, p = 0.001).

“Males with 8-10 h of nighttime sleep had an elevated risk of all-cause mortality (hazard ratio = 3.095, p = 0.001)”

Humansadjusted for covariates2 yearsmalesn = 11,054

Nighttime sleep, midday napping, and mortality in Chinese older adults: A China Health and Retirement Longitudinal Study longitudinal cohort study

The Journal of international medical research·6 Aug 2026