Table 3.

Sleep duration and cause specific mortality for subjects < 65 years

Sleep duration, hours/day	<65 years
	Crude				Multivariable adjusteda
	No. of deaths	Person-years	HR	95% CI	No. of deaths	Person-years	HR	95% CI
CVD mortality
≤5 h	22	28,119	1.40	0.87, 2.24	18	22,409	1.41	0.83, 2.37
6 h	44	96,875	0.96	0.66, 1.38	33	80,596	0.84	0.56, 1.28
7 h	83	181,293	1.00	Referent	66	154,272	1.00	Referent
≥8 h	66	95,764	1.45	1.05, 2.01	55	80,051	1.54	1.07, 2.21
Cancer mortality
≤5 h	73	28,119	1.25	0.97, 1.61	56	22,409	1.13	0.83, 1.53
6 h	163	96,875	0.92	0.76, 1.11	132	80,596	0.86	0.70, 1.07
7 h	323	181,293	1.00	Referent	271	154,272	1.00	Referent
≥8 h	212	95,764	1.25	1.05, 1.48	168	80,051	1.16	0.94, 1.42

^a Hazard ratios were adjusted for age, sex, BMI, smoking status, alcohol consumption, educational level, physical activity and major diseases. Attained age was used as time scale