Normal IHA (N = 4600) | High IHA (> 2.0 MoM) (N = 205) | Relative Risk (95% CI) | P value | Low IHA (> 2.0 MoM) (N = 275) | Relative Risk (95% CI) | P value | |
---|---|---|---|---|---|---|---|
Preterm birth | 381 (8.3%) | 25 (12.2%) | 1.51 (1.01–2.26) | 0.049 | 19 (6.9%) | 0.83 (0.53–1.31) | 0.420 |
Spontaneous preterm birth | 324 (7.0%) | 11 (5.4%) | 0.76 (0.42–1.37) | 0.356 | 15 (5.5%) | 0.77 (0.46–1.28) | 0.314 |
Preeclampsia | 92 (2.0%) | 15 (7.3%) | 3.47 (2.13–5.65) | < 0.001 | 7 (2.5%) | 1.26 (0.61–2.60) | 0.533 |
FGR | 153 (3.3%) | 21 (10.2%) | 3.04 (1. 99–4.65) | < 0.001 | 12 (4.4%) | 1.30 (0.75–2.27) | 0.355 |
Low birth weight | 437 (9.5%) | 31 (15.1%) | 1.65 (1.14–2.39) | 0.008 | 24 (8.7%) | 0.92 (0.61–1.38) | 0.671 |
Antepartum hemorrhage | 25 (0.5%) | 3 (1.5%) | 2.53 (0.86–7.44) | 0.091 | 1 (0.4%) | 0.68 (0.10–4.66) | 0.690 |
Postpartum hemorrhage | 78 (1.7%) | 5 (2.4%) | 1.42 (0.60–3.35) | 0.427 | 1 (0.4%) | 0.22 (0.03–1.55) | 0.089 |
Low APGAR scores | 36 (0.8%) | 2 (1.0%) | 1.01 (0.94–1.09) | 0.760 | 3 (1.1%) | 1.02 (0.93–1.12) | 0.577 |
Route of delivery | 0.401 | 0.175 | |||||
Normal delivery | 2659 (57.9%) | 116 (56.6%) | 174 (63.3%) | ||||
Cesarean delivery | 1692 (36.8%) | 74 (36.1%) | 90 (32.7%) | ||||
Vacuum extraction | 226 (4.9%) | 13 (6.3%) | 9 (3.3%) | ||||
Forceps extraction | 16 (0.3%) | 2 (1.0%) | 2 (0.7%) |