| Characteristics | Case group (n=231) | Control group (n=462) | OR (95% CI) | p |
|---|---|---|---|---|
| Gestational age (weeks) | ||||
| 24–34 | 27 (11.7) | 54 (11.7) | 1 | |
| 34–41 | 204 (88.3) | 408 (88.3) | 1.00 (0.60–1.63) | 0.99 |
| Urinary incontinence | ||||
| No | 215 (93.1) | 404 (87.4) | 1 | |
| Yes | 16 (6.93) | 58 (12.6) | 0.52 (0.29–0.92) | 0.03 |
| Type of urinary incontinence (n=74) | ||||
| Stress (pressure) | 9 (56.2) | 34 (58.6) | 1 | |
| Urgency | 4 (25.0) | 13 (22.4) | 1.18 (0.27–4.44) | 0.818 |
| Both | 3 (18.8) | 11 (19.0) | 1.05 (0.19–4.43) | 0.945 |
| Uterus contraction | ||||
| No | 95 (41.1) | 248 (53.7) | 1 | |
| Yes | 136 (58.9) | 214 (46.3) | 1.66 (1.20–2.29) | 0.002 |
| Dilated cervix status | ||||
| Closed | 58 (25.1) | 310 (67.1) | 1 | |
| 1–2 cm | 173 (74.9) | 152 (32.9) | 6.06 (4.27–8.70) | 0.001 |