Sleep Duration and Stroke Risk

A Chinese cohort study enrolled 31,750 participants with a mean age of 62 years and followed them for six years, during which 1,557 stroke events occurred. The study did not screen for or control sleep apnea and other sleep disorders as variables, a significant limitation on its conclusions. The study's findings may only apply to older, healthy Chinese adults and may not generalize to other populations. Sleeping more than 9 hours per night combined with naps exceeding 90 minutes was associated with approximately 85% higher stroke risk. Poor sleep quality was associated with 29% higher stroke risk regardless of sleep duration. Sleeping more than 9 hours per night without long naps was associated with 23% higher stroke risk compared to 7–8 hours with short naps.