Table 1 Distribution of peripartum variables and differences associated with peripartum blood transfusion
From: Predicting peripartum blood transfusion: focusing on pre-pregnancy characteristics
| Â | No transfusion 1,943,258 (98.14%) | Transfusion 36,868 (1.86%) | p-value |
|---|---|---|---|
Maternal age (years) mean ± SD | 31.16 ± 3.86 | 32.14 ± 4.26 | <  0.001 |
Maternal age ≥ 35 years, N (%) | 349,119 (17.97%) | 10,177 (27.60%) | <  0.001 |
Multifetal pregnancy, N (%) | 27,331 (1.41%) | 2761 (7.49%) | <  0.001 |
Nulliparity, N (%) | 927,079 (47.74%) | 15,968 (43.31%) | <  0.001 |
Cesarean delivery, N (%) | 713,992 (36.74%) | 21,388 (58.01%) | <  0.001 |
Gestational age at births < 37 weeks, N (%) | 56,826 (2.92%) | 5243 (14.22%) | <  0.001 |
Neonatal weight (kg) mean ± SD | 3.19 ± 0.47 | 3.03 ± 0.67 | <  0.001 |
 2.5–4.0 kg, N (%) | 1,793,764 (92.31%) | 29,503 (80.02%) | <  0.001 |
 < 2.5 kg, N (%) | 80,842 (4.16%) | 5743 (15.58%) |  |
 ≥ 4.0 kg, N (%) | 68,652 (3.53%) | 1622 (4.40%) |  |
Neonatal sex (male), N (%) | 996,211 (51.26%) | 18,111 (49.12%) | <  0.001 |
Hypertension, N (%) | 35,335 (1.82%) | 2561 (6.95%) | <  0.001 |
Postpartum hemorrhage, N (%) | 150,259 (7.73%) | 16,072 (43.59%) | <  0.001 |
Placental abruption, N (%) | 5925 (0.30%) | 1033 (2.80%) | <  0.001 |
Placenta previa, N (%) | 17,391 (0.89%) | 5479 (14.86%) | <  0.001 |
Embolization, N (%) | 151 (0.01%) | 2450 (6.65%) | <  0.001 |
Hysterectomy, N (%) | 229 (0.01%) | 1569 (4.26%) | <  0.001 |