Table 2.
Results
| No fibroids group 1 (reference group) |
Fibroids before pregnancy no operation group 2 |
Fibroids after pregnancy group 3 |
Fibroid operation before pregnancy group 4 |
||||
| (n=91 292) | (n=124) | Odds ratio (95% CI) | (n=963) | Odds ratio (95% CI) | (n=317) | Odds ratio (95% CI) | |
| Preterm birth* (week) | |||||||
| ≤37 | 4939 (5.4%) | 14 (11.3%) | 2.27 (1.30─3.96) | 55 (5.7%) | 1.08 (0.82─1.42) | 29 (9.1%) | 1.81 (1.24─2.65) |
| ≥34 < 37 | 3506 (3.9%) | 3 (2.4%) | 0.62 (0.20─1.96) | 41 (4.3%) | 1.11 (0.81─1.53) | 18 (5.7%) | 1.52 (0.94─2.43) |
| ≥28 < 34 | 1159 (1.2%) | 6 (4.8%) | 3.99 (1.75─9.13) | 11 (1.4%) | 0.90 (0.50─1.64) | 11 (5.5%) | 2.84 (1.55─5.22) |
| ≥22 < 28 | 176 (0.2%) | 5 (4.0%) | 20.09 (8.04─50.22) | 3 (0.3%) | 1.56 (0.50 ─ 4.89) | 0 (0%) | Empty |
| ≥22 < 34 | 1335 (1.5%) | 11 (8.9%) | 6.54 (3.51─12.19) | 14 (1.5%) | 0.99 (0.58─1.69) | 11 (3.5%) | 2.44 (1.33─4.48) |
| Caesarean section* | |||||||
| Overall | 14 542 (16%) | 36 (29%) | 1.83 (1.23─2.72) | 164 (17%) | 0.99 (0.84─1.19) | 110 (35%) | 2.48 (1.94─3.16) |
| Acute | 9901 (11%) | 21 (17%) | 1.54 (0.94─2.52) | 116 (12%) | 1.08 (0.88─1.32) | 62 (20%) | 1.91 (1.44─2.52) |
| Planned | 4641 (5%) | 15 (12%) | 1.92 (1.11─3.32) | 48 (5%) | 0.85 (0.64─1.14) | 48 (15%) | 2.58 (1.85─3.60) |
| IUGR* | 3731 (4.1%) | 6 (4.8%) | 1.27 (0.57─2.85) | 35 (3.6%) | 0.91 (0.65─1.28) | 13 (4.1%) | 1.05 (0.60─1.83) |
| PPH* | 3364 (3.7%) | 7 (5.7%) | 1.70 (0.70─3.65) | 36 (3.7%) | 1.06 (0.76─1.47) | 15 (4.7%) | 1.40 (0.84─2.35) |
| Abruption placentae† | 490 (0.5%) | 1 (0.8%) | 1.41 (0.20─10.15) | 6 (0.6%) | 1.13 (0.50─2.53) | 3 (0.9%) | 1.66 (0.53─5.21) |
| Uterus rupture | 7 (0.1%) | 0 (0%) | Empty | 2 (0.2%) | 2.84 (0.39─20.56) | 0 (0%) | Empty |
*Adjusted for age and body mass index.
†Adjusted for age.