Table 2.

Regression coefficients (B), 95% CI and P Value expressing associations of 24-hour sleep duration with outcome measures in men (2,438) and women (3,326)

			Men			Women
CT-derived measures	Model	Sleep hours	B	95% CI	p-value	B	95% CI	p-value
Thigh muscle lean area, cm2	1	<6h	0.70	−2.14, 3.53	0.63	−0.01	−1.54, 1.53	0.99
		>8h	−4.07	−6.49, −1.66	0.001	−2.50	−4.37, −0.62	0.009
	2	<6h	−0.20	−2.39, 1.99	0.86	0.13	−1.01, 1.26	0.83
		>8h	−2.21	−4.01, −0.40	0.017	−2.39	−3.75, −1.03	0.001
	3	<6h	0.79	−1.27, 2.85	0.45	0.27	−0.82, 1.37	0.62
		>8h	−0.22	−1.95, 1.50	0.80	−1.15	−2.49, 0.19	0.09
Thigh muscle attenuation, HU	1	<6h	−0.66	−1.39, 0.07	0.078	−0.27	−0.78, 0.24	0.30
		>8h	−1.27	−1.87, −0.66	<0.001	−1.56	−2.13, −0.98	<0.001
	2	<6h	−0.49	−1.13, 0.15	0.14	−0.17	−0.62, 0.28	0.47
		>8h	−0.48	−1.02, 0.06	0.08	−0.95	−1.47, −0.43	<0.001
	3	<6h	−0.27	−0.89, 0.35	0.39	−0.11	−0.55, 0.33	0.61
		>8h	−0.08	−0.61, 0.46	0.78	−0.51	−1.03, −0.002	0.049
Total hip integral vBMD, mg/cm3	1	<6h	4.23	−2.57, 11.03	0.22	−0.69	−5.15, 3.77	0.76
		>8h	−5.24	−10.79, 0.32	0.07	−5.73	−11.32, −0.14	0.045
	2	<6h	3.41	−3.10, 9.91	0.30	−0.15	−4.21, 3.92	0.94
		>8h	−3.02	−8.39, 2.36	0.27	−3.87	−8.97, 1.23	0.14
	3	<6h	4.23	−2.23, 10.69	0.20	−0.06	−4.07, 3.94	0.98
		>8h	−1.39	−6.90, 4.12	0.62	−1.57	−6.68, 3.55	0.55

Reference category: 6–8h of sleep per 24-hour period; Model 1: unadjusted model; Model 2: adjusted for age and BMI; Model 3: further adjusted for physical activity level, smoking status, health status, mobility disability status, number of medical conditions, cognitive status, hs-CRP, 25OHD and bone medication (only in the vBMD predictor model).