Research Article
Blood Type and Outcomes in Pregnant Women with Placenta Previa
Table 6
Labor characteristics of the participant pregnant women by Rh-positive vs. Rh-negative blood groups.
| | Rh-positive (, 97.1%) | Rh-negative (, 2.9%) | value | value |
| | Gestational age at delivery (week), | | | 0.904 | 0.366 | | Preterm birth (<37 weeks) | 674 (42.2%) | 17 (36.2%) | 0.676 | 0.411 | | Emergency admission | 1445 (88.7%) | 44 (89.8%) | 0.057 | 0.812 | | Cesarean delivery | 1235 (75.8%) | 40 (81.6%) | 0.883 | 0.347 | | Estimated blood loss (mL), median (IQR) | 500 (380-1200) | 500 (350-800) | 1.262 | 0.207 | | Postpartum hemorrhage | 382 (23.4%) | 9 (18.4%) | 0.688 | 0.407 | | Cesarean hysterectomy | 18 (1.1%) | 1 (2.0%) | 0.372 | 0.542 | | Transfusion of blood products | 543 (33.3%) | 10 (20.4%) | 3.597 | 0.058 | | Postdelivery hemoglobin (g/L) | | | 0.551 | 0.581 | | Postdelivery anemia () | 952 (70.4%) | 32 (71.1%) | 0.010 | 0.920 | | Placental length (cm) | | | 0.409 | 0.682 | | Placental width (cm) | | | 2.033 | 0.062 | | Placental depth (cm) | | | 0.386 | 0.701 | | Placental surface area (cm2) | | | 1.122 | 0.267 | | Placental volume (cm3) | | | 0.894 | 0.376 | | Placental weight (g) | | | 1.494 | 0.143 | | Male newborn | 950 (58.3%) | 25 (51.0%) | 1.041 | 0.308 | | Neonatal asphyxia | 120 (9.2%) | 1 (5.9%) | 2.016 | 0.156 | | Admission to the neonatal intensive care unit | 365 (22.4%) | 9 (18.4%) | 0.448 | 0.503 | | Apgar score of <7 at 1 min | 110 (6.8%) | 1 (2.0%) | 1.710 | 0.191 | | Apgar score of <7 at 5 min | 14 (0.9%) | 0 (0.0%) | 0.425 | 0.999 | | Apgar score of <7 at 10 min | 5 (0.3%) | 0 (0.0%) | 0.151 | 0.999 |
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