Table 2

Effect of pre-pregnancy BMI on systolic and diastolic blood pressure during pregnancy

Coefficient95% CIp Value
Systolic blood pressure
 Crude model0.320.24 to 0.40<0.01
 Adjusted model*0.250.17 to 0.34<0.01
 Explanatory model†0.410.15 to 0.66<0.01
Diastolic blood pressure
 Crude model0.220.16 to 0.27<0.01
 Adjusted model*0.180.13 to 0.24<0.01
 Explanatory model†0.270.08 to 0.45<0.01
  • Results are expressed as mixed model coefficients of systolic and diastolic blood pressure in mm Hg for every 1 kg/m2 increase in pre-pregnancy BMI.

  • *Adjusted for maternal age, parity, second-hand smoking exposure and socioeconomic status (monthly family income).

  • †As * and for total gestational weight gain (difference between maternal weight measured at the day of delivery from the pre-pregnancy weight).

  • BMI, body mass index.