Supplementary Table 3-2.

Odds ratios of incident obesity^* at 1-year follow-up as a function of sleep duration at baseline (2006) by age below the median (n = 10,153 men, n = 1,549 women)

	Number (%)	P value	Model 1‡			Model 2§			Model 3¶
			OR	95%CI	P value	OR	95%CI	P value	OR	95%CI	P value
Sleep Duration (Hours)
Men
< 5	22 (8.8)	0.02	1.74	1.09, 2.78	0.02	1.76	1.10, 2.81	0.02	1.72	1.07, 2.76	0.02
5 to < 6	110 (6.9)	0.02	1.33	1.03, 1.72	0.03	1.35	1.05, 1.75	0.02	1.35	1.04, 1.75	0.02
6 to < 7	278 (5.4)	0.68	1.04	0.84, 1.28	0.72	1.05	0.86, 1.30	0.63	1.05	0.86, 1.30	0.62
7 to < 8	143 (5.2)	1.00	1.00			1.00			1.00
8 to < 9	25 (5.9)	0.58	1.13	0.73, 1.75	0.59	1.10	0.71, 1.70	0.68	1.09	0.70, 1.69	0.70
≥ 9	5 (10.9)	0.09	2.25	0.88, 5.79	0.09	2.23	0.87, 5.76	0.10	2.17	0.84, 5.60	0.11
total	583 (5.7)
Women
< 5	0 (0.0)	0.42	0.00		1.00	0.00		1.00	0.00		1.00
5 to < 6	6 (2.3)	0.84	1.10	0.39, 3.14	0.85	1.10	0.38, 3.13	0.86	1.09	0.38, 3.13	0.87
6 to < 7	10 (1.4)	0.37	0.66	0.27, 1.65	0.38	0.66	0.26, 1.63	0.36	0.66	0.26, 1.63	0.37
7 to < 8	9 (2.1)	1.00	1.00			1.00			1.00
8 to < 9	2 (2.5)	0.37	1.20	0.25, 5.64	0.82	1.21	0.26, 5.73	0.81	1.21	0.26, 5.74	0.81
≥ 9	0 (0.0)	0.72	0.00		1.00	0.00		1.00	0.00		1.00
total	27 (1.7)

Abbreviations: OR, odds ratio; 95%CI, 95% confidence interval.

^*“Obesity” defined as a body mass index ≥25 kg/m².

^†Analysis of obesity was conducted among participants who were not obese at baseline.

^‡Model 1: adjusted for age.

^§Model 2: adjusted for the variables in model 1 plus shift-worker, smoking, alcohol consumption, and physical activity.

^¶Model 3: adjusted for the variables in model 2 plus depressive symptoms.