Table 3

Chronic lung disease/mortality in relation to latency of PPROM

GA at birth, weeksNo-PPROM
n=3400
Late-PPROM
n=829
Early-PPROM
n=225
14 days
(n=759)†
>14 days
(n=70)†
≤14 days
(n=74)
>14 days
(n=151)
All860/3400 (25.3)109/759 (14.4)
0.49 (0.39, 0.62)***
11/70 (15.7)
0.55 (0.28, 1.05)
57/74 (77)
19.99 (11.21, 35.65)***
87/151 (57.6)
4.01 (2.88, 5.59)***
 23–27580/974 (59.5)78/181 (43)
0.51 (0.37, 0.71)***
2/6 (33.3)
0.33 (0.06, 1.86)
57/74 (77)
4.42 (2.39, 8.2)***
61/85 (71.8)
1.72 (1.05, 2.81)*
 28–31280/2426 (11.5)31/578 (5.4)
0.43 (0.30, 0.64)***
9/64 (14.1)
1.25 (0.61, 2.56)
026/66 (39.4)
4.98 (2.99, 8.28)***
  • Data presented as numbers (%), OR (95% CI) unless indicated otherwise.

  • *P<0.05; **P<0.01; ***P<0.001.

  • †In comparison to No-PPROM group.

  • GA, gestational age; PPROM, prelabour preterm rupture of membranes.