Table 8.
Multivariable adjusted odds ratios (OR) and 95% confidence interval (CI) of pregnancy induced hypertension and preeclampsia according to nightly sleep duration, after stratification by maternal characteristics Seattle, Washington, 2003-2006
| Nightly Sleep Duration (h) |
||||
|---|---|---|---|---|
| Incident PIH | < 5 N = 22 | 5-6 N = 152 | 7-9 N = 963 | ≥ 10 N = 135 |
| Stratifying Variables | ||||
| Nulliparous | 2.83 (0.33 to 23.90) | 1.11 (0.36 to 3.39) | 1.00 (REF)1 | 1.39 (0.57 to 3.38) |
| Multiparous | 1.11 (0.10 to 12.90) | 1.94 (0.68 to 5.50) | 1.00 (REF)1 | 2.05 (0.43 to 9.72) |
| Lean (< 25 kg/m2) | † | 1.89 (0.69 to 5.17) | 1.00 (REF)2 | 1.87 (0.68 to 5.14) |
| Overweight (≥ 25 kg/m2) | 3.38 (0.61 to 18.80) | 1.24 (0.43 to 3.55) | 1.00 (REF)2 | 1.26 (0.40 to 4.01) |
| Incident PE | ||||
| Stratifying Variable | ||||
| Nulliparous | 6.16 (0.68 to 55.90) | 2.67 (0.70 to 10.20) | 1.00 (REF)1 | 2.57 (0.76 to 8.72) |
| Multiparous | † | 4.61 (0.28 to 75.70) | 1.00 (REF)1 | † |
| Lean (< 25 kg/m2) | 6.71 (0.72 to 62.80) | 2.73 (0.53 to 14.10) | 1.00 (REF)2 | † |
| Overweight (≥ 25 kg/m2) | 12.70 (1.04 to 154.40) | 2.59 (0.45 to 14.90) | 1.00 (REF)2 | 5.14 (1.20 to 22.10) |
1
Adjusted for maternal age and pre-pregnancy body mass index;
2
Adjusted for maternal age and parity;
†
There were too few subjects in this stratum to estimate adjusted odds ratios.