Table 1 Baseline characteristics and outcomes in each blood group
Type O n = 284 | Type A n = 285 | Type B n = 209 | Type AB n = 123 | p value | |
|---|---|---|---|---|---|
Characteristics | |||||
Age, years (SD) | 57.3 (20.0) | 56.3 (20.0) | 57.6 (19.4) | 53.6 (17.8) | 0.284 |
Female, n (%) | 64 (22.5) | 61 (21.4) | 55 (26.3) | 26 (21.1) | 0.593 |
Charlson Comorbidity Index, median (IQR) | 0 (0–2) | 0 (0–2) | 0 (0–1) | 0 (0–1) | 0.380 |
Uncrossmatched type O RBC transfusion, n (%) | 28 (9.9) | 17 (6) | 16 (7.7) | 4 (3.3) | 0.086 |
RTS, mean (SD) | 6.85 (1.43) | 7.12 (1.18) | 7.08 (1.16) | 7.23 (1.03) | 0.019 |
ISS, median (IQR) | 18 (16–25) | 18 (16–25) | 19 (16–25) | 20 (16–25) | 0.133 |
AIS head, median (IQR) | 4 (3–4) | 4 (3–4) | 4 (3–4) | 4 (3–4) | 0.842 |
AIS face, median (IQR) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0.983 |
AIS chest, median (IQR) | 0 (0–2) | 0 (0–3) | 0 (0–3) | 0 (0–3) | 0.612 |
AIS abdomen, median (IQR) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0.781 |
AIS extremities, median (IQR) | 0 (0–2) | 0 (0–2) | 0 (0–2) | 0 (0–2) | 0.681 |
AIS surface, median (IQR) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0 (0–0) | 0.873 |
Outcomes | |||||
In-hospital mortality, n (%) | 80 (28.2) | 30 (10.5) | 30 (14.4) | 11 (8.9) | < 0.001 |
Death due to exsanguination, n (%) | 23 (8.1) | 5 (1.8) | 5 (2.4) | 4 (3.3) | < 0.001 |
Death due to TBI, n (%) | 43 (15.1) | 22 (7.7) | 19 (9.1) | 3 (2.4) | < 0.001 |
Death due to other causes, n (%) | 14 (4.9) | 3 (1.1) | 6 (2.9) | 4 (3.3) | 0.062 |
Ventilator-free days, mean (SD) | 18.7 (12.2) | 23.1 (9.3) | 22.3 (10.2) | 24.5 (8.2) | < 0.001 |
Units of RBCs administered within 24 h, mean (SD) | 3 (11) | 2 (5) | 2 (10) | 2 (8) | 0.231 |