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Table 2 The associations between systolic and diastolic blood pressure at early pregnancy and educational level (and 95% CIs) (n=923) *

From: BMI mediates the association between low educational level and higher blood pressure during pregnancy in Japan

Educational level Unadjusted model Basic model† Basic model† +BMI Basic model† +smoking Basic model† +salt intake Basic model† +alcohol intake Basic model† +income Basic model† +BW gain Full model‡
SBP, mmHg          
High Reference Reference Reference Reference Reference Reference Reference Reference Reference
Mid −0.04 (−1.84 to 1.76) −0.28 (−2.08 to 1.52) −0.46 (−2.23, 1.30) −0.15 (−1.96, 1.67) −0.41 (−2.25, 1.42) −0.49 (−2.32, 1.34) −0.81 (−2.69, 1.06) −0.32 (−2.15, 1.51) −1.06 (−2.96, 0.84)
Low 2.39 (0.59 to 4.19) 2.42 (0.61 to 4.23) 1.19 (−0.62, 3.00) 2.85 (0.94, 4.76) 2.37 (0.52, 4.23) 2.23 (0.38, 4.08) 1.46 (−0.47, 3.38) 2.21 (0.36, 4.06) 0.13 (−1.94, 2.20)
DBP, mmHg          
High Reference Reference Reference Reference Reference Reference Reference Reference Reference
Mid 0.16 (−1.09 to 1.41) −0.05 (−1.29 to 1.20) −0.16 (−1.38, 1.06) 0.13 (−1.12, 1.38) −0.23 (−1.49, 1.03) −0.32 (−1.58, 0.93) −0.088 (−1.39, 1.21) −0.10 (−1.37, 1.16) −0.29 (−1.60, 1.03)
Low 0.74 (−0.52 to 1.99) 0.79 (−0.46 to 2.04) 0.041 (−1.21, 1.30) 1.31 (−0.0043, 2.63) 0.62 (−0.66, 1.90) 0.56 (−0.71, 1.83) 0.42 (−0.92, 1.75) 0.75 (−0.53, 2.02) −0.26 (−1.69, 1.17)
  1. * Estimates denote difference in BP (mmHg) between low/mid and high educational level.
  2. †Basic model: adjusted for gestational age at BP measurement, maternal age, parity, past medical history of hypertension, pregnancy-induced hypertension, diabetes mellitus, renal disease, family history of hypertension.
  3. ‡Full model: Basic model+ pre-pregnancy BMI, smoking, salt intake, alcohol intake, income, BW gain until mid-pregnancy.
  4. Abbreviations: SBP, systolic blood pressure; DBP, diastolic blood pressure, BMI, pre-pregnancy body mass index; BW gain, body weight gain until mid-pregnancy.