Introduction:

obesity has been associated with an increased risk of preeclampsia and gestational hypertension.

Objective:

to determine if overweight and/or maternal obesity at the beginning of the pregnancy are associated with an increased risk of suffering from some hypertensive state of pregnancy in a population of southern Spain.

Methods:

retrospective cohort study. We studied 4,711 cases where the IMC had been registered at the beginning of pregnancy. Two study groups were included: overweight/obesity at the beginning of the gestation. Control group: pregnant women with normal BMI at the beginning of gestation. Global risk of hypertensive disorders of pregnancy (HDP) and the risk of gestational hypertension, preeclampsia, chronic hypertension and preeclampsia superimposed on chronic hypertension were evaluated.

Results:

maternal overweight was associated with an increased risk of HDP (OR 2.04, 95% CI: 1.43-2.91) and an increased risk of gestational hypertension (OR 1.68, 95% CI: 1.03-2.72) and chronic HT (OR: 3.70, 95% CI: 1.67-8.18). Maternal obesity was associated with an increase in some HDP (OR 3.54, 95% CI: 2.65-4.73), gestational hypertension (OR 2.94, 95% CI: 2-4.33), chronic HT (OR 8.31, 95% CI: 4.23-16.42) and preeclampsia (OR 2.08, 95% CI: 1.12-3.87) In the multivariate analysis (adjusted for parity and maternal age), overweight was associated with an increased risk of gestational hypertension (OR: 1.74, 95% CI: 1.06-2.85), chronic HT (OR 3.76, 95% CI: 1.69-8.35) and preeclampsia (OR 2.12, 95% CI: 1.005-4.48); obesity also increased the risk of gestational hypertension (OR 2.40, 95% CI: 1.39-4.13), chronic hypertension (OR 17.96, 95% CI: 8.78-36.76) and preeclampsia (OR 3, 69; 95% CI: 1.64-8.27).

Conclusions:

in conclusion, a significant and independent association was found between maternal overweight/obesity and HDP. The risk is significantly higher as the BMI increases (from overweight to obesity grade 3).

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