Table 4.
Unadjusted and adjusted mean (SE) mean arterial pressure (MAP), by trimester and nightly hours of sleep during early pregnancy, Seattle, Washington, 2003-2006
| First Trimester |
Second Trimester |
Third Trimester |
||||
|---|---|---|---|---|---|---|
| Sleep group h/night | Unadjusted Mean [SE] | Δ (95% CI) | Unadjusted Mean [SE] | Δ (95% CI) | Unadjusted Mean [SE] | Δ (95% CI) |
| 9 h | 81.16 [0.36] | 80.91 [0.32] | 83.34 [0.38] | |||
| ≤ 6 h | 82.71 [0.60] | 1.55 (0.4 to 2.7) | 81.38 [0.60] | 0.47 (−0.7 to 1.6) | 86.94 [0.63] | 3.60 (2.4 to 4.8) |
| 7-8 h | 81.49 [0.44] | 0.33 (−0.5 to 1.2) | 80.38 [0.45] | −0.53 (− 1.3 to 0.3) | 85.48 [0.43] | 2.14 (1.3 to 3.0) |
| ≥ 10 h | 82.39 [0.66] | 1.23 (−0.1 to 2.5) | 81.58 [0.59] | 0.67 (− 0.5 to 1.8) | 87.55 [0.69] | 4.21 (2.9 to 5.5) |
| MODEL 1 | ||||||
| Sleep group h/night | 1Adjusted Mean [SE] | Δ (95% CI) | 1Adjusted Mean [SE] | Δ (95% CI) | 1Adjusted Mean [SE] | Δ (95% CI) |
| 9 h | 81.46 [0.38] | 81.21 [0.32] | 83.64 [0.38] | |||
| ≤ 6 h | 83.23 [0.62] | 1.77 (0.6 to 3.0) | 81.90 [0.60] | 0.69 (−0.5 to 1.9) | 87.46 [0.64] | 3.82 (2.6 to 5.1) |
| 7-8 h | 82.00 [0.44] | 0.54 (−0.3 to 1.4) | 80.89 [0.41] | −0.32 (−1.1 to 0.5) | 85.99 [0.43] | 2.35 (1.5 to 3.2) |
| ≥ 10 h | 82.55 [0.66] | 1.09 (−0.2 to 2.4) | 81.75 [0.59] | 0.54 (−0.6 to 1.7) | 87.72 [0.67] | 4.08 (2.8 to 5.4) |
| MODEL 2 | ||||||
| Sleep group h/night | 2Adjusted Mean [SE] | Δ (95% CI) | 2Adjusted Mean [SE] | Δ (95% CI) | 2Adjusted Mean [SE] | Δ (95% CI) |
| 9 h | 80.42 [0.36] | 80.17 [0.32] | 82.59 [0.38] | |||
| ≤ 6 h | 81.51 [0.57] | 1.09 (0.0 to 2.2) | 80.22 [0.56] | 0.05 (−1.0 to 1.1) | 85.77 [0.59] | 3.18 (2.0 to 4.3) |
| 7-8 h | 80.81 [0.40] | 0.39 (−0.4 to 1.2) | 79.70 [0.38] | −0.47 (−1.2 to 0.3) | 84.79 [0.40] | 2.20 (1.4 to 3.0) |
| ≥ 10 h | 81.06 [0.61] | 0.64 (−0.6 to 1.8) | 80.29 [0.54] | 0.12 (−0.9 to 1.2) | 86.24 [0.61] | 3.65 (2.5 to 4.8) |
Adjusted for maternal age, race/ethnicity, parity, and educational attainment. The adjusted mean values reported for MODEL 1 are from a regression model based on the entire study cohort (N = 1,272) with indicators variables specified to represent Non-Hispanic white, nulliparous, college educated women 25-34 years of age.
Adjusted for maternal age, race/ethnicity, parity, educational attainment, and pre-pregnancy body mass index. The other covariates in Table 1 were not confounders. The adjusted mean values reported for MODEL 2 are from a regression model based on the entire cohort (N = 1,272) with indicator variables specified to represent Non-Hispanic white, nulliparous, college educated women who are 25-34 years of age, with a pre-pregnancy BMI < 25 kg/m2.