Risk factors associated with adverse pregnancy outcomes in patients with new-onset systemic lupus erythematosus during pregnancy.

Objective: To investigate the risk factors for Adverse pregnancy outcome (APOs) in patients with new-onset SLE during pregnancy.

Methods: Eighty-five patients with new-onset SLE during pregnancy were analyzed retrospectively. Univariate and multivariate logistic regression were used to identify risk factors for different APOs (pregnancy loss, preterm birth, fetal growth restriction, and eclampsia/preeclampsia). A two-sided p-value below 0.05 was considered significant, and two-sided 95% confidence intervals (CIs) are reported.

Results: Multivariate analysis indicated that renal involvement (aOR: 7.356; 95%CI:1.516,35.692) and greater SLE disease activity index (SLEDAI) grade (aOR:5.947;95%CI: 1.586,22.294) increased the risk for composite APO, and that use of heparin therapy (aOR: 0.081; 95%CI: 0.012, 0.532) was a protective factor. Advanced gestational age at disease onset (aOR: 0.879; 95%CI: 0.819,0.943) and high serum albumin level (aOR: 0.908,95%CI: 0.831,0.992) protected against pregnancy loss. Renal involvement increased the risk for preterm birth (aOR: 2.272; 95%CI: 1.030,7.222) and fetal growth restriction (aOR: 9.070; 95%CI: 1.131,72.743). Hypertension (aOR: 19.185; 95%CI: 3.921,93.868), renal involvement (aOR: 8.380, 95%CI: 1.944,74.376) increased the risk for eclampsia/preeclampsia.

Conclusions: New onset SLE during pregnancy increased the risk for multiple APOs. Timely management of the risk factors identified here may help to improve pregnancy outcomes in these patients.