Research Article
Blood Type and Outcomes in Pregnant Women with Placenta Previa
Table 2
Labor characteristic of the participant pregnant women by ABO blood groups.
| | O (, 39.7%) | A (, 30.3%) | B (, 23.5%) | AB (, 6.5%) | value | value |
| | Gestational age at delivery (week), | | | | | 4.092 | 0.007 | | Preterm birth (<37 week) | 270 (41.3%) | 225 (45.4%) | 142 (36.5%) | 54 (50.5%) | 10.389 | 0.015 | | Emergency admission | 595 (89.3%) | 442 (87.0%) | 355 (89.9%) | 97 (89.0%) | 2.279 | 0.518 | | Cesarean delivery | 510 (76.6%) | 401 (78.9%) | 277 (70.1%) | 87 (79.8%) | 10.859 | 0.012 | | Estimated blood loss (mL), median (IQR) | 600 (400-1300) | 600 (400-1200) | 500 (350-1000) | 500 (385-1000) | 4.174 | 0.243 | | Postpartum hemorrhage | 165 (24.8%) | 123 (24.2%) | 80 (20.3%) | 23 (21.1%) | 3.394 | 0.335 | | Cesarean hysterectomy | 7 (1.1%) | 8 (1.6%) | 1 (0.3%) | 3 (2.8%) | 6.527 | 0.067 | | Transfusion of blood products | 230 (34.5%) | 173 (34.1%) | 113 (28.6%) | 37 (33.9%) | 4.457 | 0.217 | | Postdelivery hemoglobin (g/L) | | | | | 1.332 | 0.262 | | Postdelivery anemia () | 390 (70.3%) | 310 (71.8%) | 211 (67.4%) | 73 (75.3%) | 2.828 | 0.420 | | Placental length (cm) | | | | | 0.685 | 0.561 | | Placental width (cm) | | | | | 0.388 | 0.762 | | Placental depth (cm) | | | | | 0.761 | 0.516 | | Placental surface area (cm2) | | | | | 0.713 | 0.544 | | Placental volume (cm3) | | | | | 0.788 | 0.500 | | Placental weight (g) | | | | | 0.091 | 0.965 | | Male newborn | 378 (56.8%) | 313 (61.6%) | 213 (53.9%) | 71 (65.1%) | 8.118 | 0.044 | | Neonatal asphyxia | 61 (9.2%) | 35 (6.9%) | 16 (4.1%) | 9 (8.3%) | 9.931 | 0.019 | | Admission to the neonatal intensive care unit | 161 (24.2%) | 112 (22.0%) | 77 (19.5%) | 24 (22.0%) | 3.170 | 0.367 | | Apgar score of <7 at 1 min | 53 (8.0%) | 33 (6.5%) | 16 (4.1%) | 9 (8.3%) | 6.637 | 0.083 | | Apgar score of <7 at 5 min | 5 (0.8%) | 6 (1.2%) | 3 (0.8%) | 0 (0) | 1.082 | 0.779 | | Apgar score of <7 at 10 min | 1 (0.2%) | 3 (0.6%) | 1 (0.3%) | 0 (0) | 1.885 | 0.611 |
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