Supplementary Table 3-1.

Odds ratios of incident obesity^* at 1-year follow-up as a function of sleep duration at baseline (2006) by age above the median (n = 9,870 men, n = 1,640 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	21 (10.1)	< 0.01	2.18	1.35, 3.53	< 0.01	2.17	1.34, 3.52	< 0.01	2.08	1.28, 3.37	< 0.01
5 to < 6	99 (7.9)	< 0.001	1.65	1.27, 2.16	< 0.001	1.65	1.26, 2.16	< 0.001	1.63	1.24, 2.12	< 0.001
6 to < 7	276 (5.9)	0.07	1.21	0.99, 1.48	0.07	1.21	0.98, 1.49	0.07	1.21	0.98, 1.48	0.07
7 to < 8	151 (5.0)	1.00	1.00			1.00			1.00
8 to < 9	38 (6.2)	0.22	1.25	0.87, 1.81	0.23	1.26	0.87, 1.82	0.22	1.25	0.87, 1.81	0.23
≥ 9	3 (4.8)	0.94	0.96	0.30, 3.09	0.94	0.95	0.30, 3.08	0.94	0.93	0.29, 3.01	0.91
total	588 (6.0)
Women
< 5	1 (1.4)	0.45	0.49	0.06, 3.91	0.50	0.45	0.06, 3.68	0.46	0.45	0.05, 3.62	0.45
5 to < 6	8 (2.0)	0.44	0.73	0.28, 1.93	0.53	0.71	0.27, 1.87	0.48	0.70	0.26, 1.85	0.47
6 to < 7	30 (3.7)	0.56	1.32	0.62, 2.83	0.47	1.29	0.60, 2.77	0.52	1.30	0.61, 2.80	0.50
7 to < 8	9 (3.0)	1.00	1.00			1.00			1.00
8 to < 9	0 (0.0)	0.56	0.00		1.00	0.00		1.00	0.00		1.00
≥ 9	0 (0.0)	0.67	0.00		1.00	0.00		1.00	0.00		1.00
total	48 (2.9)

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.