SERPINE1 and preeclampsia: However, a stepwise multivariate logistic regression analysis showed that only PAI-1 (OR 4.065, IC95% 1.872–8.828) and PAPP-A (OR 0.398, IC95% 0.186–0.850) were independent factors associated with small for gestational age in women with preterm preeclampsia (Table 3).