Clinical characteristics and pregnancy outcomes according to preterm labor and intact membranes (PTL) or preterm premature rupture of membranes (preterm-PROM).

GA, gestational age; SD, standard deviation; NS, not significant; Cx, cervical.
†Of 213 cases, the data about cervical dilatation at the time of amniocentesis through a review of medical records were not available in 11 cases.
‡Of 213 cases, the data about clinical chorioamnionitis through a review of medical records were not available in 5 cases.