Research Article
Blood Type and Outcomes in Pregnant Women with Placenta Previa
Table 1
Maternal and gestation characteristics of the participant pregnant women by ABO blood groups.
| | O (, 39.7%) | A (, 30.3%) | B (, 23.5%) | AB (, 6.5%) | value | value |
| | Rhesus D positive (%) | 638 (95.8%) | 499 (98.2%) | 385 (97.5%) | 107 (98.2%) | 6.293 | 0.088 | | Maternal age (years), | | | | | 0.115 | 0.952 | | Advanced maternal age (>35 years old) | 166 (33.7%) | 131 (33.8%) | 88 (32.5%) | 29 (34.1%) | 0.161 | 0.984 | | Maternal height (cm) | | | | | 1.150 | 0.327 | | Maternal weight at delivery (kg) | | | | | 0.177 | 0.912 | | Maternal BMI at delivery (kg/m2), | | | | | 0.846 | 0.469 | | Married (%) | 633 (95.0%) | 483 (95.1%) | 381 (96.5%) | 105 (96.3%) | 1.392 | 0.708 | | Prior miscarriages (%) | 342 (51.4%) | 251 (49.4%) | 183 (46.3%) | 62 (59.6%) | 4.748 | 0.191 | | Prior cesarean delivery | 235 (35.3%) | 180 (35.4%) | 125 (31.6%) | 38 (34.9%) | 1.807 | 0.616 | | Assisted reproductive techniques | 62 (9.3%) | 64 (12.6%) | 38 (9.6%) | 12 (11.0%) | 3.744 | 0.289 | | Twins | 18 (2.7%) | 26 (5.1%) | 18 (4.6%) | 7 (6.4%) | 6.843 | 0.073 | | Anterior placenta | 206 (45.3%) | 164 (45.4%) | 119 (41.9%) | 41 (51.3%) | 2.403 | 0.493 | | Complete placenta previa | 266 (39.9%) | 217 (42.7%) | 141 (35.7%) | 46 (42.2%) | 4.831 | 0.185 | | Placenta accreta spectrum | 110 (16.5%) | 81 (15.9%) | 57 (14.4%) | 17 (15.6%) | 0.826 | 0.844 | | Predelivery hemoglobin (g/L) | | | | | 2.356 | 0.070 | | Predelivery anemia (hemoglobin <110 g/L) | 321 (51.0%) | 268 (55.7%) | 179 (47.6%) | 63 (60.0%) | 8.518 | 0.036 | | Antepartum hemorrhage | 223 (33.5%) | 147 (28.9%) | 105 (26.6%) | 43 (39.4%) | 10.184 | 0.017 |
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