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Table 1 Overview of patient characteristics, mechanisms of injury, management and first laboratory values determined at admission in the propensity score matched groups comparing two 1 trauma centres (LUKS: Cantonal Hospital Lucerne, USZ: University Hospital Zurich)

From: Comparison of two different coagulation algorithms on the use of allogenic blood products and coagulation factors in severely injured trauma patients: a retrospective, multicentre, observational study

  USZ (n = 172) LUKS (n = 172) Standardized difference
Age (years) 53.6 (21.8) 51.1 (19.7) 0.09
Sex (male) 119 (69%) 121 (70%) 0.03
Heart rate (bpm) on admission 90 (23) (n = 169) 91 (21) (n = 167) 0.04
Systolic blood pressure (mmHg) on admission 131 (27) (n = 171) 132 (31) (n = 168) 0.04
Penetrating trauma 8 (5%) 6 (4%) (n = 169) 0.06
GCS on scene 13 [6;15] (n = 167) 13 [6;15] (n = 169) 0.09
ISS 27.8 (14.5) 27.9 (11.5) 0.01
Time (min.) prehospital 65 [55;84] 70 [55;90] (n = 143) 0.01#
Time (min.) ED 145 [100;255] 170 [105;309] (n = 143) 0.11#
Prehospital intubation 48 (28%) 56 (33%) 0.10
Vasopressor use (in the ED) 90 (52%) 93 (54%) 0.03
First laboratory values determined after admission to the ED
 Haemoglobin (g/dl) 12.1 (2.1) (n = 166) 12.1 (2.3) (n = 169) 0.00
 Platelet count (G/l) 186 [152;225] (n = 167) 197 [164;227] (n = 164) 0.10#
 Base Excess (mmol/l) −3.5 (4.9) (n = 165) −2.8 (5.5) (n = 165) 0.12
 Lactate (mmol/l) 1.7 [1.1;2.6] (n = 166) 1.7 [1.0;3.0] (n = 148) 0.13#
 Quick’s value (%) 71 (22) (n = 167) 73 (19) (n = 166) 0.09
 Fibrinogen (g/l) 2.3 (1.0) (n = 160) 2.3 (0.8) (n = 162) 0.07
  1. Data reported as frequency (n) with percentage (%), mean (SD) or median [Q1;Q3]. Standardized difference for the explanatory variables = absolute difference in means or proportions divided by pooled standard deviation. #: standardized difference computed for logarithmically transformed variable. Standardized difference is ≤ 0.13 for all explanatory variables, stating an acceptable balance between the matched groups
  2. BPM beats per minute, ED emergency department, GCS glasgow coma scale, ISS injury severity score