Table 2 The comparison of characteristics and outcomes between blood type O and other blood types
Type O n = 284 | Non-O type n = 617 | p value | |
|---|---|---|---|
Characteristics | |||
Age, years (SD) | 57.3 (20.0) | 56.2 (19.4) | 0.442 |
Female, n (%) | 64 (22.5) | 142 (23) | 0.873 |
Charlson Comorbidity Index, median (IQR) | 0 (0–2) | 0 (0–1) | 0.829 |
Uncrossmatched type O RBC transfusion, n (%) | 28 (9.9) | 37 (6) | 0.051 |
RTS, (SD) | 6.85 (1.4) | 7.13 (1.2) | 0.003 |
ISS, median (IQR) | 18 (16–25) | 19 (16–25) | 0.160 |
AIS head, median (IQR) | 4 (3–4) | 4 (3–4) | 0.582 |
AIS face, median (IQR) | 0 (0–0) | 0 (0–0) | 0.783 |
AIS chest, median (IQR) | 0 (0–2) | 0 (0–3) | 0.342 |
AIS abdomen, median (IQR) | 0 (0–0) | 0 (0–0) | 0.561 |
AIS extremities, median (IQR) | 0 (0–2) | 0 (0–2) | 0.443 |
AIS surface, median (IQR) | 0 (0–0) | 0 (0–0) | 0.652 |
Outcomes | |||
In-hospital mortality, n (%) | 80 (28.2) | 71 (11.5) | < 0.001 |
Death due to exsanguination, n (%) | 23 (8.1) | 15 (2.4) | < 0.001 |
Death due to TBI, n (%) | 43 (15.1) | 44 (7.1) | < 0.001 |
Death due to other causes, n (%) | 15 (1.8) | 11 (5.3) | 0.005 |
Ventilator-free days, mean (SD) | 18.7 (12.2) | 23.1 (9.4) | < 0.001 |
Units of RBCs administered within 24 h, mean (SD) | 3 (9) | 2 (7) | 0.112 |