Table 3.
Hazard ratios (95% confidence intervals) for risk of incident SLE in Nurses’ Health Study and NHSII by sleep duration (n=180,359) with lag (at least four years between sleep measurement and SLE risk window)
| Sleep Duration | <=5 hours | >5–6 hours | 6–7 hours | >7–8 hours | >8 hours |
|---|---|---|---|---|---|
| No. of cases/person-years | 11/110155 | 29/719055 | 73/1592723 | 34/1113861 | 7/191905 |
| Multivariable modela | 3.14 (1.57–6.29) | 1.22 (0.74–2.01) | 1.39 (0.92–2.10) | Ref | 1.26 (0.56–2.87 |
| Multivariable modela + shiftwork, depression, and pain | 2.43 (1.21–4.90) | 1.09 (0.66–1.81) | 1.38 (0.92–2.08) | Ref | 1.05 (0.46–2.39) |
CI, confidence interval
a
Adjusted for cohort, questionnaire cycle, age, race, smoking, body mass index, census tract household income, alcohol, exercise, oral conceptive use, menopausal status, and hormone use, and diet (Alternative Healthy Eating Index)