| | Characteristics | Result |
| | Number of women with PPROM | 567 | | Maternal age (mean ± S.D.) | 30.66 ± 4.98 | | Weeks of gestation at admission (mean ± S.D.) | 35.64 ± 0.83 | | Nulliparous, n (%) | 241,(42.5%) | | Pregnancy | | | Singleton, n (%) | 530,(93.4%) | | Twin, n (%) | 33(5.82%) | | Latency period (d) | 0.88 ± 1.68 |
| | Maternal outcome | | | Major maternal complications | | | Cesarean delivery, n (%) | 284,(50%) | | Precipitate labor, n (%) | 78,(14%) | | Fetal distress, n (%) | 48,(8%) | | Increased infection index before labour, n (%) | 37,(7%) | | Fever, n (%) | 29,(5%) | | Uterine atony, n (%) | 25,(4%) | | Postpartum hemorrhage, n (%) | 15,(3%) | | Placental abruption, n (%) | 12,(2%) | | Pathological placental membrane inflammation, n (%) | 10,(2%) | | Placental adhesions, n (%) | 7,(1%) | | Curettage, n (%) | 6,(1%) | | Fetal membrane residue, n (%) | 3,(1%) | | Prolapse of umbilical cord, n (%) | 2,(0%) | | Chorioamnionitis, n (%) | 1,(0%) |
| | Neonatal outcomes | | | Neonatal number | 600 | | Neonatal death/be abandoned, n (%) | 2,(0%) | | Neonatal survival, n (%) | 598,(100%) | | Birth weight/g(mean ± S.D.) | 2706.89 ± 414.28 | | Apgar score at 1 minute | 9.88 ± 0.64 | | Apgar score at 5 minute | 9.96 ± 0.36 | | Hospitalization length (d) | 4.52 ± 5.66 | | Endotracheal intubation, n (%) | 3,(1%) | | NICU admission, n (%) | 327,(55%) | | Major neonatal condition | | | Neonatal hyperbilirubinemia, n (%) | 264,(44%) | | Neonatal pneumonia, n (%) | 176,(29%) | | Patent foramen ovale, n (%) | 144,(24%) | | Neonatal hypoglycemia, n (%) | 80,(13%) | | Myocardial damage, n (%) | 69,(12%) | | Neonatal infection | 55,(9%) | | Patent ductus arteriosus, n (%) | 45,(8%) | | Electrolyte disorder, n (%) | 41,(7%) | | ABO hemolytic disease of newborn, n (%) | 35,(6%) | | Pulmonary hypertension, n (%) | 27,(5%) | | Atrial septal defect, n (%) | 20,(3%) | | Premature brain, n (%) | 19,(3%) | | Neonatal anemia, n (%) | 16,(3%) | | Septicemia, n (%) | 24,(4%) | | Neonatal intracranial hemorrhage, n (%) | 11,(2%) | | Ventricular septal defect, n (%) | 10,(2%) | | Neonatal asphyxia, n (%) | 8,(1%) | | Neonatal respiratory distress syndrome, n (%) | 8,(1%) | | Abnormal coagulation function, n (%) | 6,(1%) | | Neonatal respiratory failure, n (%) | 7,(1%) |
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