Sleep Duration & Mortality
This gold‑standard meta‑analysis pooled data from 25 prospective cohort studies and 1.3 million adults to understand how sleep duration relates to mortality. The findings reveal a clear U‑shaped relationship: both short sleep (<6 hours) and long sleep (>8–9 hours) are linked to higher all‑cause mortality. The lowest risk sits consistently around 7 hours per night, […]