Table 2.
Association between sleep duration and sleep disturbance with CHD: stratified by sex
| Usual sleep duration, h | Men |
Women |
P Value for interaction of sex | ||||
|---|---|---|---|---|---|---|---|
| Persons at risk, no. | CHD, no. | Unadjusteda | Persons at risk, no. | CHD, no. | Unadjusteda | ||
| ≤ 5 | 254 | 47 | 1.66 (1.23, 2.25) | 202 | 35 | 1.39 (0.97, 1.98) | 0.47 |
| 6 | 1836 | 261 | 1.21 (1.03, 1.41) | 868 | 137 | 1.21 (0.97, 1.50) | 0.97 |
| 7 | 3459 | 417 | 1.00 | 1522 | 201 | 1.00 | |
| ≥ 8 | 1052 | 132 | 1.06 (0.87, 1.28) | 648 | 77 | 0.91 (0.70, 1.18) | 0.38 |
| Lost sleep over worry | |||||||
| Not at all | 2809 | 324 | 1.00 | 1163 | 146 | 1.00 | |
| No more than usual | 2954 | 394 | 1.17 (1.01, 1.36) | 1519 | 211 | 1.11 (0.90, 1.37) | 0.95 |
| More than usual | 855 | 141 | 1.48 (1.22, 1.80) | 552 | 93 | 1.36 (1.05, 1.76) | 0.92 |
| Restless, disturbed nights | |||||||
| Not at all | 2326 | 246 | 1.00 | 1024 | 124 | 1.00 | |
| No more than usual | 3000 | 388 | 1.24 (1.05, 1.45) | 1404 | 196 | 1.19 (0.95, 1.49) | 0.96 |
| More than usual | 1291 | 225 | 1.69 (1.41, 2.03) | 805 | 130 | 1.33 (1.04, 1.70) | 0.79 |
a
Data are presented as relative risk (95% confidence interval).
CHD refers to coronary heart disease.