Table 6.
Prospective Odds Ratios and 95% Confidence Intervals of Baseline Sleep Duration and a Weight Gain of 5 kg or More From 1995 to 2004 Among Women, by Subgroup, National Institutes of Health-AARP Diet and Health Study
| Subgroup | Sleep Duration, hours |
P for Trend | |||||||
|---|---|---|---|---|---|---|---|---|---|
| <5 |
5–6 |
7–8 |
≥9 |
||||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | ||
| Age, yearsa | |||||||||
| 50–<55 | 1.36 | 0.99, 1.88 | 1.18 | 1.06, 1.33 | 1 | Referent | 0.94 | 0.68, 1.30 | 0.001 |
| 55–<60 | 1.15 | 0.87, 1.52 | 1.08 | 0.98, 1.19 | 1 | Referent | 0.88 | 0.66, 1.18 | 0.04 |
| 60–<65 | 1.37 | 1.03, 1.82 | 1.21 | 1.09, 1.34 | 1 | Referent | 1.04 | 0.79, 1.37 | <0.001 |
| 65–71 | 1.4 | 1.04, 1.88 | 1.05 | 0.93, 1.18 | 1 | Referent | 1.23 | 0.93, 1.63 | 0.31 |
| P for interaction | 0.55 | ||||||||
| Educational levela | |||||||||
| Less than college | 1.4 | 1.14, 1.73 | 1.12 | 1.03, 1.22 | 1 | Referent | 0.91 | 0.70, 1.17 | <0.001 |
| Some college or higher | 1.28 | 1.03, 1.59 | 1.13 | 1.05, 1.21 | 1 | Referent | 1.06 | 0.88, 1.26 | <0.001 |
| P for interaction | 0.76 | ||||||||
| Smoking statusb | |||||||||
| Never | 1.36 | 1.10, 1.69 | 1.18 | 1.09, 1.28 | 1 | Referent | 1.01 | 0.82, 1.26 | <0.001 |
| Former | 1.23 | 0.97, 1.56 | 1.09 | 1.00, 1.19 | 1 | Referent | 1.09 | 0.87, 1.35 | 0.05 |
| Current | 1.37 | 0.92, 2.06 | 1.03 | 0.89, 1.19 | 1 | Referent | 0.78 | 0.49, 1.24 | 0.17 |
| P for interaction | 0.88 | ||||||||
| Baseline body mass indexa,c | |||||||||
| 15–24.9 | 1.47 | 1.13, 1.90 | 1.16 | 1.06, 1.26 | 1 | Referent | 1.33 | 1.07, 1.64 | 0.004 |
| 25–29.9 | 1.34 | 1.05, 1.70 | 1.11 | 1.01, 1.21 | 1 | Referent | 0.78 | 0.60, 1.03 | <0.001 |
| 30–50 | 1.16 | 0.89, 1.51 | 1.11 | 0.99, 1.24 | 1 | Referent | 0.91 | 0.68, 1.23 | 0.03 |
| P for interaction | 0.03 | ||||||||
| Physical activity levela | |||||||||
| ≤3 times/month | 1.22 | 0.96, 1.54 | 1.04 | 0.95, 1.14 | 1 | Referent | 0.87 | 0.69, 1.11 | 0.06 |
| 1–4 times/week | 1.41 | 1.13, 1.76 | 1.21 | 1.12, 1.30 | 1 | Referent | 1.01 | 0.81, 1.26 | <0.001 |
| ≥5 times/week | 1.15 | 0.79, 1.66 | 1.11 | 0.98, 1.27 | 1 | Referent | 1.28 | 0.91, 1.80 | 0.33 |
| P for interaction | 0.19 | ||||||||
| Overall time spent sittinga | |||||||||
| <3 hour/day | 1.56 | 1.16, 2.09 | 1.22 | 1.09, 1.37 | 1 | Referent | 0.97 | 0.59, 1.36 | <0.001 |
| 3–6 hour/day | 1.22 | 0.99, 1.49 | 1.12 | 1.04, 1.20 | 1 | Referent | 1.05 | 0.86, 1.28 | 0.002 |
| ≥7 hour/day | 1.31 | 0.96, 1.77 | 1.07 | 0.97, 1.19 | 1 | Referent | 0.99 | 0.75, 1.29 | 0.06 |
| P for interaction | 0.03 | ||||||||
Abbreviation: CI, confidence interval; OR, odds ratio.
a Adjusted for age, baseline body mass index, race/ethnicity, marital status, educational level, self-reported health, smoking status, alcohol consumption, and coffee consumption.
b Adjusted for all variables above except for smoking status.
c Weight (kg)/height (m)2.