Table 5 Adjusted OR of other factors at time thresholds with significant differences of EOP in 3 days according to length of time of PROM.

From: Latency period of PROM at term and the risk of neonatal infectious diseases

Time threshold of PROM(h)a

City

Mother’s age

Education

Induction of labor

Antibiotic

Caesarean section

MSAF

Child_sex

Apgar score ≤ 7

BD

AD

HL

16

0.523b (0.392, 0.696)

0.967 (0.916, 1.021)

0.688 (0.315, 1.504)

0.505 (0.219, 1.167)

1.356 (0.594, 3.098)

0.154b (0.070, 0.340)

1.798b (1.084, 2.981)

1.427 (0.924, 2.204)

1.348 (0.811, 2.241)

0.905 (0.599, 1.369)

77.830b (32.751,184.957 )

18

0.518b (0.388, 0.690)

0.967 (0.915, 1.021)

0.697 (0.319, 1.523)

0.509 (0.220, 1.175)

1.374 (0.601, 3.140)

0.151b (0.068, 0.335)

1.872b (1.137, 3.082)

1.377 (0.894, 2.122)

1.351 (0.814, 2.245)

0.898 (0.594, 1.357)

78.508b (33.157 185.892)

20

0.516b (0.387, 0.689)

0.966 (0.915, 1.020)

0.695 (0.318, 1.520)

0.508 (0.220, 1.173)

1.354 (0.593, 3.094)

0.150b (0.067, 0.333)

1.922b (1.174, 3.146)

1.342 (0.872, 2.065)

1.341 (0.807, 2.228)

0.898 (0.594, 1.357)

78.383b (33.062 185.826)

22

0.519b (0.390, 0.692)

0.964 (0.913, 1.017)

0.684 (0.313, 1.493)

0.500 (0.217, 1.153)

1.334 (0.585, 3.041)

0.156b (0.070, 0.346)

2.058b (1.267, 3.343)

1.322 (0.859, 2.035)

1.345 (0.810, 2.235)

0.899 (0.595, 1.359)

74.734b (31.706 176.154)

  1. aLength of time of ruptured membranes from 0 h through specific time threshold.
  2. bP < 0.05.