Table 3 Comparisons of cumulative clinical outcomes before and after propensity score matching
Characteristic | Before propensity score matching | After propensity score matching | ||||||
|---|---|---|---|---|---|---|---|---|
Growth hormone (n = 1,326) | Control (n = 1,717) | aRR (95%CI)a | P value | Growth hormone (n = 694) | Control (n = 694) | aRR (95%CI)a | P value | |
Cumulative live birth | 499 (37.6%) | 390 (22.7%) | 1.5 (1.2, 1.7) | < 0.01 | 241 (34.7%) | 191 (27.5%) | 1.4 (1.1, 1.8) | < 0.01 |
Live birth of first transfer | 325 (24.51%) | 277 (16.13%) | 1.4 (1.2, 1.7) | < 0.01 | 172 (24.8%) | 130 (18.7%) | 1.4 (1.1, 1.8) | < 0.01 |
Biochemical pregnancy | 624 (47.1%) | 521 (30.3%) | 1.5 (1.3, 1.8) | < 0.01 | 306 (44.1%) | 244 (35.2%) | 1.5 (1.2, 1.8) | < 0.01 |
Clinical pregnancy | 578 (43.6%) | 472 (27.5%) | 1.50 (1.3, 1.8) | < 0.01 | 281 (40.5%) | 223 (32.1%) | 1.4 (1.1, 1.8) | < 0.01 |
Ongoing pregnancy | 503 (37.9%) | 393 (22.9%) | 1.5 (1.3, 1.8) | < 0.01 | 241 (34.7%) | 192 (27.7%) | 1.4 (1.1, 1.8) | < 0.01 |
Twin pregnancy | 99 (19.5%) | 55 (13.6%) | 1.5 (1.0, 2.1) | 0.05 | 50 (20.5%) | 31 (15.8%) | 1.4 (0.8, 2.3) | 0.21 |
Miscarriage | 80 (6.0%) | 85 (5.0%) | 1.2 (0.9, 1.7) | 0.20 | 40 (5.8%) | 34 (4.9%) | 1.2 (0.8, 2.0) | 0.47 |
Ectopic pregnancy | 5 (0.4%) | 2 (0.1%) | 3.4 (0.6, 19.0) | 0.17 | 3 (0.4%) | 1 (0.1%) | 3.0 (0.3, 30.7) | 0.62 |
Birth weight (kg) | ||||||||
Singleton | ||||||||
Mean | 3.3 ± 0.6 | 3.3 ± 0.5 | NA | 0.20 | 3.3 ± 0.5 | 3.3 ± 0.5 | NA | 0.25 |
Number of observations | 408 | 351 | 173 | 132 | ||||
Low birth weight | 2.0 ± 0.3 | 2.1 ± 0.4 | NA | 0.36 | 2.1 ± 0.3 | 2.2 ± 0.3 | NA | 0.64 |
Macrosomic infants | 4.2 ± 0.3 | 4.2 ± 0.2 | NA | 0.61 | 4.2 ± 0.3 | 4.2 ± 0.1 | NA | 0.60 |
Twins | ||||||||
Mean | 2.5 ± 0.4 | 2.4 ± 0.4 | NA | 0.68 | 2.5 ± 0.4 | 2.5 ± 0.4 | NA | 0.89 |
Number of observations | 99 | 55 | 50 | 31 | ||||
Low birth weight | 2.1 ± 0.4 | 2.1 ± 0.3 | NA | 0.92 | 2.1 ± 0.4 | 2.1 ± 0.3 | NA | 0.92 |
Macrosomic infants | NA | NA | NA | NA | NA | NA | NA | NA |
Gestation delivery in weeks | 38.3 ± 2.1 | 38.4 ± 2.1 | NA | 0.49 | 38.5 ± 1.9 | 38.3 ± 2.1 | NA | 0.29 |
Fetal sex | ||||||||
Singleton | NA | 0.81 | NA | 0.52 | ||||
Female | 158 (48.0%) | 124 (49.0%) | 88 (50.9%) | 72 (54.5%) | ||||
Male | 171 (52.0%) | 129 (51.0%) | 85 (49.1%) | 60 (45.5%) | ||||
Twins | NA | 0.59 | NA | 0.89 | ||||
Female twins | 29 (29.3%) | 12 (21.8%) | 12 (24.0%) | 6 (19.4%) | ||||
Male twins | 26 (26.3%) | 15 (27.3%) | 15 (30.0%) | 10 (32.3%) | ||||
Boy-girl twins | 44 (44.4%) | 28 (50.9%) | 23 (46.0%) | 15 (48.4%) | ||||
Preterm birth | 91 (18.2%) | 63 (16.2%) | 1.19 (0.83, 1.72) | 0.35 | 35 (14.5%) | 34 (17.8%) | 0.8 (0.5, 1.4) | 0.36 |
Type of delivery | NA | 0.12 | NA | 0.29 | ||||
Vaginal | 101 (20.2%) | 96 (24.6%) | 49 (20.3%) | 47 (24.6%) | ||||
Cesarean section | 398 (79.8%) | 294 (75.4%) | 192 (79.7%) | 144 (75.4%) | ||||