Prediction of preeclampsia and delivery of small for gestational age babies based on a combination of clinical risk factors in high-risk women.

OBJECTIVE To develop clinical risk tools for preeclampsia and small for gestational age (SGA) in high-risk women. METHODS Individual risk scores based on clinical risk factors were calculated using logistic regression and validated in 1687 women with obesity in first pregnancy, chronic hypertension, or previous preeclampsia. RESULTS The risk of preeclampsia varied from 7% in obese primiparae without hypertension to 30% when previous preeclampsia and chronic hypertension occurred together. A prediction model incorporating these risk factors had a sensitivity of 48 and 89% for preeclampsia delivered <34 weeks' gestation. CONCLUSION Multiple clinical risk factors increase the risk of preeclampsia and SGA.