Table 3.
Unadjusted and adjusted mean (SE) diastolic blood pressure (DBP), 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 | 66.00 [0.36] | 65.50 [0.33] | 68.01 [0.38] | |||
| ≤ 6 h | 67.70 [0.59] | 1.70 (0.5 to 2.9) | 66.01 [0.58] | 0.51 (−0.6 to 1.6) | 71.39 [0.62] | 3.38 (2.2 to 4.6) |
| 7-8 h | 66.41 [0.42] | 0.41 (−0.4 to 1.2) | 64.97 [0.40] | −0.53 (−1.3 to 0.2) | 70.08 [0.42] | 2.07 (1.3 to 2.9) |
| ≥ 10 h | 67.49 [0.66] | 1.49 (0.2 to 2.8) | 65.98 [0.58] | 0.48 (−0.7 to 1.6) | 71.89 [0.66] | 3.88 (2.6 to 5.2) |
| 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 | 66.19 [0.37] | 65.69 [0.33] | 68.19 [0.38] | |||
| ≤ 6 h | 68.04 [0.61] | 1.85 (0.7 to 3.0) | 66.35 [0.58] | 0.66 (−0.5 to 1.8) | 71.71 [0.63] | 3.52 (2.3 to 4.7) |
| 7-8 h | 66.76 [0.43] | 0.57 (−0.3 to 1.4) | 65.32 [0.40] | −0.37 (−1.2 to 0.4) | 70.43 [0.42] | 2.24 (1.4 to 3.1) |
| ≥ 10 h | 67.58 [0.65] | 1.39 (0.1 to 2.7) | 66.07 [0.58] | 0.38 (−0.8 to 1.5) | 71.97 [0.65] | 3.78 (2.5 to 5.1) |
| 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 | 65.29 [0.35] | 64.80 [0.33] | 67.29 [0.38] | |||
| ≤ 6 h | 66.61 [0.57] | 1.32 (0.2 to 2.4) | 64.97 [0.54] | 0.17 (−0.9 to 1.2) | 70.33 [0.59] | 3.04 (1.9 to 4.2) |
| 7-8 h | 65.75 [0.40] | 0.46 (−0.3 to 1.2) | 64.32 [0.37] | −0.48 (−1.2 to 0.3) | 69.42 [0.40] | 2.13 (1.4 to 2.9) |
| ≥ 10 h | 66.32 [0.61] | 1.03 (−0.2 to 2.2) | 64.84 [0.54] | 0.04 (−1.0 to 1.1) | 70.72 [0.60] | 3.43 (2.3 to 4.6) |
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 25-34 years of age, with a pre-pregnancy BMI < 25 kg/m2.