Outcomes
The primary pregnancy outcome was neonatal complications, including
premature birth and low birth weight (LBW). Secondary outcomes were
obstetric complications, including gestational hypertension, gestational
diabetes mellitus (GDM), postpartum hemorrhage (PPH), placental
abruption, placenta previa, cesarean section (C/S), and length of
hospital stay after surgery. Patient characteristics such as maternal
age and parity were evaluated using the KNHI claims database. The length
of hospital stay after surgery and the time interval between surgery and
delivery were also measured.