Although it is common to use risk factors in the screening for preeclampsia, they do not always accurately identify patients who truly have this condition. To determine the discriminatory accuracy of known preeclampsia risk factors, both individually and in combination. We studied patients undergoing prenatal care who were diagnosed with preeclampsia or eclampsia (n = 160 cases) in primary care and those who were not (n = 430 controls). Data on history of preeclampsia, type 2 diabetes, chronic hypertension, multiple gestation, first pregnancy, pregnancy interval ≥10 years, overweight/obesity, mean arterial pressure (MAP) ≥80 mmHg, and age (