Table 3. Association of sleep duration with incident type 2 diabetes in the 45 and Up Study.
| Model 1a | Model 2b |
Model 3c
|
||
|---|---|---|---|---|
| Sleep duration | HRd | HR | HR | Events/pye |
| <6 h | 1·28 (1·10-1·49)** | 1·23 (1·06-1·44)** | 1·29 (1·08-1·53)** | 147/11,335 |
| 6 h | 1·03 (0·93-1·13) | 1·01 (0·91-1·12) | 1·00 (0·90-1·12) | 438/44,521 |
| 7 h | 1 | 1 | 1 | 921/94,111 |
| 8 h | 1·01 (0·93-1·08) | 1·00 (0·93-1·08) | 1·00 (0·92-1·09) | 1,500/150,728 |
| 9 h | 1·00 (0·91-1·11) | 1·00 (0·90-1·11) | 0·99 (0·88-1·12) | 410/40,565 |
| ≥10 h | 1·09 (0·97-1·23) | 1·05 (0·93-1·19) | 1·03 (0·88-1·19) | 225/20,737 |
Notes: ** P<0·01.
a Model 1 (N=192,728) included all eligible participants except those reporting type 2 diabetes at baseline, and was adjusted for age and sex. b Model 2 (N=192,728) included all eligible participants except those reporting type 2 diabetes at baseline, and was adjusted for age, sex, education, marital status, residential remoteness, alcohol consumption, smoking status, health insurance status, income, body mass index, physical activity and baseline health status. c Model 3 (N=156,902) excluded all participants reporting any serious illness at baseline (current/past cancer, or diagnosed/ treated heart disease, stroke or type 2 diabetes), and was adjusted for the same set of covariates as Model 2. d Hazard ratio with 95% confidence interval, representing the estimated risk of type 2 diabetes for the specified category of sleep duration, compared with the reference category of 7 h. e Number of incident type 2 diabetes cases recorded/total person years at risk during follow-up.