Table 4 shows the results of multivariate
logistic regression analysis. The risk factors that
were significantly associated with increased risk of
preeclampsia were: maternal age > 35 years (odds ratio
(ORs) 1.7; 95% CI 1.1-2.9), nulliparity (ORs 3.8; 95% CI
2.5-5.7), prepregnancy body mass index > 30 kg/m2
(ORs 3.0; 95% CI 1.4-6.3), multifetal pregnancy (ORs
2.8; 95% CI 1.2-7.1), history of preeclampsia in previous
pregnancy (ORs 17.0; 95% CI 3.3-87.6) and history of
chronic hypertension (ORs 19.5; 95% CI 2.4-155.7).
On the other hand, maternal age < 20 years (ORs 0.4;
95% CI 0.2-0.9) and prepregnancy body mass index
< 20 kg/m2 (ORs 0.4; 95% CI 0.2-0.6) were significant
protective factors against the development of preeclampsia