Table 4.

Stratified analyses of age and gender groups in the association of sleep duration with incident CVD.

Subgroups	N	Events, n (%)	Adjusted HR (95% CI)
Age
Age < 60
≤6	1,231	190	1.16 (0.84–1.61)
6–8	1,770	220	1 (ref)
>8	976	117	0.96 (0.66–1.40)
Age ≥ 60
≤6	3,570	784	1.17 (1.02–1.35)
6–8	3,264	632	1 (ref)
>8	1,908	416	1.20 (1.02–1.41)
Gender
Male
≤6	2,073	92	1.07 (0.87–1.30)
6–8	2,527	62	1 (ref)
>8	1,492	34	1.26 (1.02–1.55)
Female
≤6	2,728	618	1.24 (1.05–1.47)
6–8	2,507	454	1 (ref)
>8	1,392	266	1.04 (0.84–1.28)