TABLE 2.

Adjusted mean (standard error) body mass index, and waist circumference among 13,742 participants aged ≥20 years, by levels of sleep duration, National Health and Nutrition Examination Survey 2005–2010

	Sleep duration (h/night)
	1–6 (N = 5408)	7–9 (N = 8001)	10+ (N = 333)	P for overall adjusted Wald F-test	P 1–6 vs 7–9	P 7–9 vs 10+	P 1–6 vs 10+
Body mass index (kg/m2)
Model 1a	29.3 (0.1)	28.2 (0.1)	27.5 (0.4)	<0.001	<0.001	0.100	<0.001
Model 2b	29.2 (0.1)	28.3 (0.1)	27.4 (0.4)	<0.001	<0.001	0.035	<0.001
Model 3c	29.2 (0.1)	28.3 (0.1)	27.5 (0.4)	<0.001	<0.001	0.052	<0.001
Model 4d	29.0 (0.1)	28.4 (0.1)	27.3 (0.4)	<0.001	<0.001	0.006	<0.001
Waist circumference (cm)
Model 1a	99.6 (0.3)	97.2 (0.3)	95.8 (1.1)	<0.001	<0.001	0.216	0.001
Model 2b	99.3 (0.3)	97.4 (0.3)	96.0 (1.0)	<0.001	<0.001	0.170	0.002
Model 3c	99.3 (0.3)	97.4 (0.3)	96.0 (1.0)	<0.001	<0.001	0.175	0.002
Model 4d	98.8 (0.3)	97.7 (0.3)	95.4 (0.9)	0.001	0.002	0.023	0.001

^aAdjusted for age.

^bAdjusted for age, gender, race or ethnicity, and education, employment status, and children aged ≤17 years in household.

^cAdjusted for variables in model 2 plus smoking status, leisure-time physical activity, and alcohol use.

^dAdjusted for variables in model 3 plus any prescription medication use, depression score, histories of diabetes, cardiovascular disease, chronic obstructive pulmonary disease, arthritis, thyroid disease, liver disease, cancer, and sleep disorder.