Table 3.
Results, stratified analyses and adjusted OR
| Fibroids before pregnancy no operation group 2 odds ratio (95% CI) |
Odds ratio (95% CI) | Fibroids after pregnancy group 3 odds ratio (95% CI) |
Odds ratio (95% CI) | Operation before pregnancy group 4 odds ratio (95% CI) |
Odds ratio (95% CI) | |
| No fertility treatment n=75/81 836 |
Fertility treatment n=17/5522 |
No fertility treatment n=869/81 836 |
Fertility treatment n=94/5522 |
No fertility treatment n=140/81 836 |
Fertility treatment n=91/5522 |
|
| Preterm birth (week) | ||||||
| ≤37 | 1.74 (0.75─4.02) | 1.37 (0.39─4.76) | 1.04 (0.77─1.41) | 0.93 (0.51─1.72) | 1.05 (0.49─2.25) | 1.06 (0.59─1.92) |
| ≥34 to <37 | 0.37 (0.05─2.69) | Empty | 1.02 (0.71─1.47) | 1.20 (0.62─2.33) | 1.24 (0.55─2.80) | 0.97 (0.47─2.02) |
| ≥28 to <34 | 2.45 (0.60─10.02) | 3.37 (0.77─14.85) | 0.94 (0.48─1.81) | 0.55 (0.13─2.25) | 0.64 (0.09─4.61) | 1.47 (0.59─3.60) |
| ≥22 to <28 | 25.60 (7.95─82.43) | 8.36 (1.08─64.50) | 2.13 (0.68─6.69) | Empty | Empty | Empty |
| ≥22 to <34 | 5.57 (2.24─13.85) | 4.5 (1.28─15.76) | 1.09 (0.62─1.93) | 0.46 (0.17─1.87) | 1.09 (0.6─1.93) | 1.22 (0.49─3.04) |
| Singleton pregnancy n=119/89 338 |
Multiple pregnancies n=5/1964 |
Singleton pregnancy n=925/89 338 |
Multiple pregnancies n=38/1964 |
Singleton pregnancy n=292/89 338 |
Multiple pregnancies n=25/1964 |
|
| Preterm birth (week) | ||||||
| ≤37 | 1.90 (0.32─11.45) | 2.18 (1.17─4.05) | 0.66 (0.34─1.30) | 1.02 (0.75─1.39) | 1.17 (0.53─2.59) | 1.33 (0.81─2.16) |
| ≥34 to <37 | 0.76 (0.24─2.40) | Empty | 0.99 (0.68─1.42) | 0.99 (0.49─2.03) | 1.26 (0.68─1.42) | 0.77 (0.31─1.95) |
| ≥28 to <34 | 3.41 (1.25─9.28) | 4.40 (0.73─26.48) | 0.96 (0.50─1.86) | 0.37 (0.09─1.53) | 1.71 (0.70─4.15) | 2.09 (0.82─5.27) |
| ≥22 to <28 | 22.32 (8.18─60.92) | 12.95 (1.41─118.77) | 2.08 (0.66─6.56) | Empty | Empty | Empty |
| ≥22 to <34 | 6.11 (2.99─12.51) | 8.4 (1.41─50.93) | 1.11 (0.63─1.98) | 0.31 (0.75─1.31) | 1.48 (0.61─3.59) | 1.78 (0.71─4.50) |