LAUSR

Key Points Question Is late bedtime associated with general and abdominal obesity and does a heterogonous association exist between men and women? Findings In this cross-sectional study of 136 652 participants from 26 countries from the Prospective Urban Rural Epidemiology study, after adjustment for a wide range of potential confounding factors, late nocturnal bedtime and short nocturnal sleep were associated with increased risk of general and abdominal obesity, while longer daytime napping could not compensate for the loss but further increased risk of abdominal obesity, especially among women. Meaning These findings suggest that encouraging earlier bedtime and avoiding short nocturnal sleep may benefit weight control.