Multivariate logistic regression models investigating the role of
maternal conditions (diabetes mellitus, hypertensive disorders, liver
disorders), fetal characteristics (non-reassuring fetal status, IUGR,
prenatally diagnosed fetal anomalies or aneuploidies, and amniotic fluid
disorders), pregnancy complications (pPROM, spontaneous PTL,
chorioamnionitis, vaginal bleeding from placental abruption or abnormal
placentation) on neonatal outcomes. To control for confounding, the
following variables were tested in each model: maternal age, parity,
previous preterm birth, race, education, BMI, excessive wait gain,
smoking, utilization of assisted reproductive technologies, treatment
with LDA, progesterone, or LMWH, antenatal corticosteroids
The area under receiver operating characteristic (ROC) curve was
respectively 0.71 for composite adverse neonatal outcomes, 0.62 for
neonatal resuscitation, 0.64 for metabolic complications, and 0.72 for
respiratory support.
AOR: adjusted OR
For details about specific definitions please see table S1 .