Table III.
Comparison of the RBC transfusion group and non-RBC transfusion group
| Non-RBC transfusion group | RBC transfusion group | ||||
|---|---|---|---|---|---|
| No. | % | No. | % | ||
| Total patients | 6,277,789 | 98.77 | 78,257 | 1.23 | |
| Median [Q1–Q3] | Median [Q1–Q3] | p-value | |||
| Age | 28 [27.45–31] | 31 [27–35] | <0.0001 | ||
| Birth mode | No. | % | No. | % | p-value |
| Vaginal delivery | 4,270,621 | 68.03 | 42,909 | 54.83 | <0.0001 |
| Cesarean section | 2,208,323 | 35.18 | 39,205 | 50.10 | <0.0001 |
| Risk factors | No. | % | No. | % | p-value |
| Essential hypertension | 9,878 | 0.16 | 550 | 0.70 | <0.0001 |
| Gestational hypertension | 71,309 | 1.13 | 1,611 | 2.06 | <0.0001 |
| Diabetes during pregnancy (pre-existing) | 368,764 | 5.87 | 5,654 | 7.23 | <0.0001 |
| Gestational diabetes | 341,504 | 5.44 | 5,097 | 6.51 | <0.0001 |
| Nicotine abuse | 33,624 | 0.54 | 426 | 0.54 | 0.7387 |
| Obesity | 149,817 | 2.39 | 2,142 | 2.74 | <0.0001 |
| Grade I | 25,308 | 0.40 | 435 | 0.56 | <0.0001 |
| Grade II | 21,886 | 0.35 | 359 | 0.46 | <0.0001 |
| Grade III | 25,004 | 0.40 | 401 | 0.51 | <0.0001 |
| Anemia | No. | % | No. | % | p-value |
| Vitamine B12-, folic acid-, any other dietary anemia | 1,344 | 0.02 | 156 | 0.20 | <0.0001 |
| Anemia of unspecified cause | 702,304 | 11.19 | 50,661 | 64.74 | <0.0001 |
| Anemia due to acute bleeding situations | 610,792 | 9.73 | 49,352 | 63.06 | <0.0001 |
| Anemia during pregnancy | 1,453,576 | 23.15 | 55,088 | 70.39 | <0.0001 |
| Anticoagulation therapy | 8,486 | 0.14 | 294 | 0.38 | <0.0001 |
| Bleeding | No. | % | No. | % | p-value |
| Prepartum hemorrhage | 23,625 | 0.38 | 1,134 | 1.45 | <0.0001 |
| Prepartum hemorrhage due to coagulation disorder | 281 | <0.01 | 137 | 0.18 | <0.0001 |
| Intrapartum hemorrhage | 23,539 | 0.37 | 2,971 | 3.80 | <0.0001 |
| Postpartum hemorrhage | 273,193 | 4.35 | 32,417 | 41.42 | <0.0001 |
| Complications | median [Q1–Q3] | median [Q1–Q3] | p-value | ||
| Hospital LOS [h] | 87.08 [69.50–116.52] | 127.5 [95.68–189.45] | <0.0001 | ||
| Mechanical ventilation [h] | 8 [3–30] | 20 [7–55] | <0.0001 | ||
| No. | % | No. | % | p-value | |
| ICU admission | 20,768 | 0.33 | 9,772 | 12.45 | <0.0001 |
| Pneumonia | 266 | <0.01 | 384 | 0.49 | <0.0001 |
| Renal failure | 22,449 | 0.36 | 1,635 | 2.09 | <0.0001 |
| Postpartum renal failure | 1,542 | 0.02 | 678 | 0.87 | <0.0001 |
| Cardiopulmonary resuscitation | 675 | 0.01 | 982 | 1.25 | <0.0001 |
| Cardiac complications during pregnancy | 25,580 | 0.41 | 922 | 1.18 | <0.0001 |
| Death | 25 | <0.01 | 25 | 0.03 | <0.0001 |
| Child born dead | 1,777 | 0.03 | 946 | 1.21 | <0.0001 |
RBC: red blood cell; Q1–Q3: interquartile range; LOS: length of stay; ICU: intensive care unit.