Table 4 shows the unadjusted and adjusted ORs for women without chronic hypertension for whom nulliparity, prepregnancy diabetes, race=ethnicity, and BMI ≥25 remained significant predictors of PIH. Unlike the results for the overall population, the association between PIH and gestational diabetes was no longer significant among this group of women without hypertension. In addition, the increased risk associated with black race was no longer significant. As shown in Table 4, the adjusted ORs for women without chronic hypertension were generally similar to unadjusted ORs. Nulliparity, Hispanic ethnicity, Asian or American Indian race, and maternal prepregnancy BMI remained significant predictors of PIH.