Figure 1.
Prevalence differences* for obesity, overweight, and abdominal obesity by sleep duration, sleep efficiency, and sleep variability. (A) Sleep duration. (B) Sleep efficiency. (C) Sleep variability (in minutes). *Interpretation: Sleeping less than five hours per night was associated with an additional 16 cases of obesity per 100 individuals studied. Models adjusted for age, sex, race, field center, depressive symptoms, anti-depressants, alcohol use, sleep medication, smoking, income, marital status, and education. Obesity was defined as ≥ 30 kg/m2, overweight was defined as 25–29.9 kg/m2, abdominal obesity was ≥ 88 cm for women and ≥ 102 cm for men.