Research Article
Blood Type and Outcomes in Pregnant Women with Placenta Previa
Table 4
Labor characteristics of the participant pregnant women by type O vs. non-type O blood groups.
| | Type O (, 39.7%) | Non-type O (, 60.3%) | value | value |
| | Gestational age at delivery (week), | | | 1.496 | 0.135 | | Preterm birth (<37 week) | 270 (41.3%) | 421 (42.4%) | 0.193 | 0.683 | | Emergency admission | 595 (89.3%) | 894 (88.3%) | 0.401 | 0.529 | | Cesarean delivery | 510 (76.6%) | 765 (75.6%) | 0.213 | 0.683 | | Estimated blood loss (mL), median (IQR) | 600 (400-1300) | 500 (350-1100) | 1.225 | 0.221 | | Postpartum hemorrhage | 165 (24.8%) | 226 (22.3%) | 1.341 | 0.262 | | Cesarean hysterectomy | 7 (1.1%) | 12 (1.2%) | 0.065 | 0.820 | | Transfusion of blood products | 230 (34.5%) | 323 (31.9%) | 1.246 | 0.266 | | Postdelivery hemoglobin (g/L) | | | 1.421 | 0.155 | | Postdelivery anemia () | 390 (70.3%) | 594 (70.5%) | 0.012 | 0.952 | | Placental length (cm) | | | 0.155 | 0.876 | | Placental width (cm) | | | 0.587 | 0.557 | | Placental depth (cm) | | | 0.538 | 0.591 | | Placental surface area (cm2) | | | 1.083 | 0.279 | | Placental volume (cm3) | | | 0.901 | 0.368 | | Placental weight (g) | | | 0.250 | 0.803 | | Male newborn | 378 (56.8%) | 597 (59.0%) | 0.824 | 0.390 | | Neonatal asphyxia | 61 (9.2%) | 60 (5.9%) | 6.264 | 0.016 | | Admission to the neonatal intensive care unit | 161 (24.2%) | 213 (21.0%) | 2.267 | 0.134 | | Apgar score of <7 at 1 min | 53 (8.0%) | 58 (5.7%) | 3.224 | 0.087 | | Apgar score of <7 at 5 min | 5 (0.8%) | 9 (0.9%) | 0.093 | 0.794 | | Apgar score of <7 at 10 min | 1 (0.2%) | 4 (0.4%) | 0.812 | 0.654 |
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