Normal cytology group N=42,398 | Treated, cone-length ≤10 mm N=1805 | Treated, cone-length 11–12 mm N=361 | Treated, cone-length 13–15mm N=174 | Treated, cone-length >15mm N=68 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N (%) | N (%) | aORa | p | N (%) | aORa | p | N (%) | aORa | p | N (%) | aORa | p | |
PTD, <37 weeks | 1794 (4.2) | 119 (6.6) | 1.53 (1.26–1.86) | <0.001 | 33 (9.1) | 2.19 (1.52–3.15) | <0.001 | 20 (11.5) | 2.79 (1.74–4.48) | <0.001 | 15 (22.1) | 5.90 (3.28–10.59) | <0.001 |
Spontaneous PTD | 1264 (3.0) | 93 (5.2) | 1.72 (1.38–2.15) | <0.001 | 27 (7.5) | 2.58 (1.73–3.85) | <0.001 | 17 (9.8) | 3.40 (2.05–5.65) | <0.001 | 12 (17.6) | 6.63 (3.51–12.52) | <0.001 |
pPROM | 479 (1.1) | 53 (2.9) | 2.33 (1.73–3.12) | <0.001 | 15 (4.2) | 3.42 (2.01–5.82) | <0.001 | 6 (3.4) | 2.80 (1.23–6.39) | 0.014 | 9 (13.2) | 11.68 (5.64–24.18) | <0.001 |
PROM, delivery at ≥ 37 weeks | 2084 (5.1) | 113 (6.7) | 1.17 (0.96–1.43) | 0.12 | 30 (9.1) | 1.67 (1.14–2.45) | 0.009 | 9 (5.8) | 1.09 (0.55–2.15) | 0.81 | 10 (18.9) | 4.12 (2.04–8.29) | <0.001 |
Chorioamnionitis | 97 (0.2) | 7 (0.4) | 1.29 (0.59–2.82) | 0.52 | 1 (0.3) | 1.01 (0.14–7.33) | 0.99 | 0 | – | – | 1 (1.5) | 6.06 (0.81–45.38) | 0.080 |
Neonatal sepsis | 591 (1.4) | 31 (1.7) | 1.02 (0.71–1.47) | 0.92 | 5 (1.4) | 0.87 (0.36–2.13) | 0.77 | 3 (1.7) | 1.12 (0.36–3.53) | 0.85 | 6 (8.8) | 5.72 (2.43–13.47) | <0.001 |