Table 1.
Patient characteristics
| Variable | Adenomyosis (n = 1,204) |
Non-adenomyosis (n = 151,105) |
P-value | |
|---|---|---|---|---|
| Age (years) | 35 | 32 | 0.02 | |
| Number of pregnancies | P0 | 878 (72.9%) | 86,455 (57.2%) | < 0.01 |
| P1 or more | 326 (27.1%) | 64,651 (42.8%) | ||
| ART | 349 (20.6%) | 14,581 (9.6%) | < 0.01 | |
| Type of delivery | Spontaneous | 588 (48.8%) | 102,749 (67.9%) | < 0.01 |
| Instrumental | 148 (12.3%) | 14,069 (9.3%) | ||
| Selective Cesarean section | 216 (18.0%) | 21,708 (14.3%) | ||
| Emergency Cesarean section | 252 (20.9%) | 12,552 (8.3%) | ||
| Gestational age at delivery (weeks) | 22–36 | 193 (16.0%) | 16,045 (10.6%) | < 0.01 |
| 37–41 | 1,007 (83.6%) | 134,683 (89.1%) | ||
| 42+ | 3 (0.2%) | 284 (0.2%) | ||
| Unknown | 1 (0.08%) | 91 (0.06%) | ||
| Maternal morbidities | PROM | 67 (5.6%) | 9,031(6.3%) | < 0.01 |
| Threatened premature labor | 233 (19.3%) | 19,017 (12.5%) | < 0.01 | |
| Uterine rupture | 2 (0.2%) | 27 (0.01%) | 0.02 | |
| Placental abruption | 19 (1.6%) | 1,449 (0.9%) | 0.02 | |
| HDP | 121 (10.0%) | 9,884 (6.5%) | < 0.01 | |
| Infant morbidity | FGR | 64 (5.3%) | 5,739 (3.8%) | < 0.01 |
| Infant mortality | 1 (0.1%) | 11 (0.007%) | NS | |
Abbreviations: ART, assisted reproductive technology; PROM, premature rupture of membranes; HDP, Hypertensive disorders in pregnancy; FGR, fetal growth restriction; NS, not significant