Table 2 Hazard ratios (95% CI) of incident CVD according to sleep duration and age groups in all participants (N = 33,883)

20-49y (N = 8039)

 CVD Incidence (N)

7

9

5

5

 Model 1

1.41 (0.52, 3.79)

1 (REF)

0.72 (0.24, 2.15)

1.90 (0.63, 5.71)

 Model 2

1.29 (0.44, 3.75)

1 (REF)

0.77 (0.25, 2.37)

1.37(0.36, 5.21)

50-59y (N = 11,383)

 CVD Incidence (N)

29

39

39

20

 Model 1

1.13 (0.70, 1.83)

1 (REF)

1.38 (0.88, 2.15)

1.96 (1.14, 3.37) ^*

 Model 2

1.27 (0.76, 2.12)

1 (REF)

1.52 (0.95, 2.45)

2.07 (1.15, 3.74) ^*

60-74y (N = 14,461)

 CVD Incidence (N)

68

110

117

92

 Model 1

1.13 (0.84, 1.53)

1 (REF)

1.11 (0.86, 1.45)

1.47 (1.12, 1.95) ^*

 Model 2

1.18 (0.86, 1.62)

1 (REF)

1.06 (0.80, 1.40)

1.43 (1.04, 1.93) ^*