Table 1 Patient clinical characteristics.

Maternal age(years)

32.6 ± 5.2

Primiparity

31 (42.5%)

Delivery by caesarean section

56 (76.7%)

Administration of corticosteroid

59 (80.8%)

Gestational age at PROM (weeks)

24.5 ± 1.9

Gestational age at delivery (weeks)

27.0 ± 3.0

Delivery at less than 37 weeks of gestation

72 (98.6%)

≧34 weeks

2

30–33 weeks

8

26–29 weeks

31

22–25 weeks

31

Days form PROM to delivery (days)

17.4 ± 20.5

Clinical CAM

16 (21.9%)

^aOligohydramnios

57 (78.1%)

^bAnhydramnios

24(32.9%)

Duration of oligohydramnios before delivery (days)

17.4 ± 20.5