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Table 3 The associations between systolic and diastolic blood pressure at mid-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 0.29 (−1.50, 2.07) −0.0063 (−1.77, 1.76) −0.20 (−1.92, 1.52) 0.17 (−1.60, 1.95) −0.14 (−1.94, 1.66) −0.18 (−1.98, 1.62) −0.31 (−2.16, 1.54) 0.32 (−1.46, 2.10) 0.085 (−1.75, 1.92)
Low 1.52 (−0.27, 3.30) 1.84 (0.057, 3.61) 0.58 (−1.20, 2.35) 2.53 (0.66 to 4.40) 1.87 (0.045, 3.69) 1.76 (−0.057, 3.59) 1.17 (−0.73, 3.06) 1.77 (−0.035, 3.57) 0.53 (−1.48, 2.53)
DBP, mmHg          
High Reference Reference Reference Reference Reference Reference Reference Reference Reference
Mid 0.81 (−0.42, 2.03) 0.58 (−0.62, 1.78) 0.47 (−0.71, 1.66) 0.73 (−0.48, 1.94) 0.40 (−0.82, 1.62) 0.37 (−0.86, 1.59) 0.14 (−1.10, 1.37) 0.69 (−0.53, 1.90) 0.17 (−1.08, 1.41)
Low 0.83 (−0.39, 2.06) 0.99 (−0.22 to 2.20) 0.30 (−0.92, 1.52) 1.44 (0.17 to 2.72) 1.10 (−0.13 to 2.34) 1.02 (−0.22, 2.25) 0.42 (−0.85, 1.69) 1.00 (−0.23, 2.22) 0.06 (−1.31, 1.42)
  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.