Research Article
Blood Type and Outcomes in Pregnant Women with Placenta Previa
Table 3
Maternal and gestation 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 |
| | Rhesus D positive (%) | 638 (95.8%) | 991 (97.9%) | 6.423 | 0.012 | | Maternal age (years), | | | 0.062 | 0.951 | | Advanced maternal age (>35 years old) | 166 (33.7%) | 248 (33.3%) | 0.015 | 0.902 | | Maternal height (cm) | | | 0.871 | 0.384 | | Maternal weight at delivery (kg) | | | 0.477 | 0.634 | | Maternal BMI at delivery (kg/m2), | | | 0.962 | 0.336 | | Married (%) | 633 (95.0%) | 969 (95.8%) | 0.463 | 0.549 | | Prior miscarriages (%) | 342 (51.4%) | 496 (49.0%) | 0.879 | 0.369 | | Prior cesarean delivery | 235 (35.3%) | 343 (33.9%) | 0.345 | 0.564 | | Assisted reproductive techniques | 62 (9.3%) | 114 (11.3%) | 1.636 | 0.222 | | Twins | 18 (2.7%) | 51 (5.0%) | 5.563 | 0.011 | | Anterior placenta | 206 (45.3%) | 324 (44.7%) | 0.039 | 0.857 | | Complete placenta previa | 266 (39.9%) | 404 (39.9%) | 0.001 | 0.999 | | Placenta accreta spectrum | 110 (16.5%) | 155 (15.3%) | 0.435 | 0.538 | | Predelivery hemoglobin (g/L) | | | 0.563 | 0.573 | | Predelivery anemia () | 321 (51.0%) | 510 (53.0%) | 0.649 | 0.442 | | Antepartum hemorrhage | 223 (33.5%) | 295 (29.2%) | 3.534 | 0.066 |
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