Table 2.
Association between average sleep duration and subsequent incident diabetes, defined using all available glycemic data and participant report of doctor-diagnosed diabetes, using four data cycles
| Confounder adjustments |
||||||
|---|---|---|---|---|---|---|
| Average sleep duration among those with no change in sleep duration |
No. events |
n* |
Age and sex | Age, sex, and ethnic group | Age, sex, ethnic group, and employment grade | Age, sex, ethnic group, employment grade, and BMI at the beginning and end of each exposure period |
| OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | |||
| ≤5.5 h | 90 | 1,303 | 1.59 (1.22, 2.05) | 1.43 (1.10, 1.85) | 1.35 (1.04, 1.76) | 1.25 (0.96, 1.63) |
| 6.0–6.5 h | 253 | 5,957 | 0.98 (0.81, 1.19) | 0.96 (0.79, 1.16) | 0.94 (0.78, 1.14) | 0.88 (0.73, 1.07) |
| 7 h | 204 | 4,875 | 1.00 (reference†) | 1.00 (reference†) | 1.00 (reference†) | 1.00 (reference†) |
| 7.5–8.0 h | 179 | 4,183 | 1.00 (0.82, 1.23) | 0.98 (0.80, 1.21) | 0.98 (0.80, 1.21) | 0.98 (0.80, 1.21) |
| ≥8.5 h | 18 | 361 | 1.11 (0.67, 1.82) | 1.00 (0.61, 1.66) | 1.01 (0.61, 1.67) | 0.94 (0.57, 1.56) |
| P value for quadratic model | 0.002 | 0.017 | 0.049 | 0.23 | ||
*Number of person-observations.
†ORs compared with those who had 7 h sleep on both occasions.