Table 3.
Comparison between patients with/without FFP/RBC ratio ≥1 within 6 h with propensity score matching
| FFP/RBC ≥1 within 6 h | |||||
| No | Yes | P value | Standardized difference test | ||
| n | 53 | 53 | |||
| Age | 53.0 [18.0, 87.0] | 50.0 [22.0, 90.0] | 0.914 | 0.08 | |
| Prehospital fluid (%) | Yes | 7 (13.2) | 9 (17.0) | 0.787 | 0.05 |
| Anticoagulant and/or antiplatelet (%) | Yes | 3 (5.7) | 3 (5.7) | 1 | 0.00 |
| ISS | 29.0 [16.0, 66.0] | 29.0 [16.0, 57.0] | 0.766 | 0.04 | |
| Tranexamic acid ≤3 h (%) | Yes | 26 (49.1) | 22 (41.5) | 0.559 | 0.08 |
| Heart rate on admission | 101.0 [42.0, 161.0] | 94.0 [52.0, 164.0] | 0.417 | 0.03 | |
| SBP on admission (mmHg) | 116.0 [18.0, 175.0] | 110.0 [40.0, 190.0] | 0.542 | 0.01 | |
| Respiratory rate on admission | 23.0 [12.0, 50.0] | 22.0 [10.0, 49.0] | 0.257 | 0.06 | |
| WBC on admission (×103/μL) | 12.8 [3.4, 32.5] | 11.2 [4.3, 36.9] | 0.17 | 0.07 | |
| Hb on admission (g/dL) | 11.6 [6.5, 16.2] | 11.9 [2.8, 16.0] | 0.618 | 0.06 | |
| PLT on admission (×104/μL) | 20.0 [9.4, 37.6] | 19.4 [4.6, 37.8] | 0.431 | 0.05 | |
| CPK on admission (IU/L) | 397.0 [64.0, 2835.0] | 378.0 [64.0, 1401.0] | 0.485 | 0.05 | |
| Base excess on admission | −4.6 [−17.9, 3.8] | −4.7 [−20.9, 1.7] | 0.892 | 0.04 | |
The propensity score was created from all variables in Table 4. Caliper Matching (scale = 0.003) was performed.
Prehospital fluid: whether the patients received intravenous infusion before admission or not.
Anticoagulant and/or antiplatelet: whether the patients had been receiving these drugs based on their history.
Tranexamic acid ≤3 h: whether the patients received tranexamic acid intravenously within 3 h after admission.
CPK indicates creatine phosphokinase; Hb, haemoglobin; ISS, injury severity score; PLT, platelet count; SBP, systolic blood pressure; WBC, white blood cell count.