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Table 1 Standardised differences of patients with traumatic OHCA
| Before Matching | After Matching | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Epinephrine | no-Epinephrine | Standardised Difference | Epinephrine | no-Epinephrine | Standardised Difference | |||||
| Case | 822 | 208 | 178 | 178 | ||||||
| Age, years, median (IQR) | 54 | (33) | 54 | (30) | 4.4% | 55 | (30) | 54 | (31) | 2.5% |
| missing data | 59 | (7.2%) | 18 | (8.7%) | ||||||
| Sex, male, n (%) | 581 | (70.7%) | 133 | (63.9%) | 14.4% | 124 | (70.0%) | 109 | (61.2%) | 17.8% |
| missing data | 0 | (0%) | 0 | (0%) | ||||||
| Witness, n (%) | 482 | (58.8%) | 110 | (52.9%) | 11.9% | 102 | (57.3%) | 90 | (50.6%) | 13.6% |
| missing data | 2 | (0.2%) | 0 | (0%) | ||||||
| Bystander CPR, n (%) | 133 | (16.3%) | 25 | (12.1%) | 12.1% | 26 | (14.6%) | 18 | (10.1%) | 13.7% |
| missing data | 5 | (0.6%) | 1 | (0.5%) | ||||||
| Signs of life at scene, n (%) | 84 | (10.2%) | 8 | (3.9%) | 25.0% | 12 | (6.7%) | 6 | (3.4%) | 15.4% |
| missing data | 0 | (0%) | 1 | (0.5%) | ||||||
| Asystole at scene, n (%) | 519 | (64.4%) | 161 | (77.4%) | 28.9% | 132 | (74.2%) | 143 | (80.3%) | 14.8% |
| missing data | 16 | (1.9%) | 0 | (0%) | ||||||
| Collapsed to CA during transportation, n (%) | 97 | (12.0%) | 12 | (5.8%) | 21.8% | 15 | (8.4%) | 8 | (4.5%) | 16.1% |
| missing data | 11 | (1.3%) | 1 | (0.5%) | ||||||
| Epinephrine prior to hospital arrival, n (%) | 94 | (12.2%) | 11 | (5.5%) | 23.8% | 15 | (8.4%) | 10 | (5.6%) | 11.0% |
| missing data | 54 | (6.6%) | 9 | (4.3%) | ||||||
| ROSC prior to hospital arrival, n (%) | 23 | (2.9%) | 15 | (7.2%) | 20.0% | 7 | (3.9%) | 8 | (4.5%) | 2.8% |
| missing data | 19 | (2.3%) | 0 | (0%) | ||||||
| Signs of life on hospital arrival, n (%) | 25 | (3.1%) | 21 | (10.1%) | 28.5% | 12 | (6.7%) | 13 | (7.3%) | 2.2% |
| missing data | 21 | (2.6%) | 1 | (0.5%) | ||||||
| Asystole on hospital arrival, n (%) | 666 | (81.8%) | 181 | (87.4%) | 15.6% | 157 | (88.2%) | 160 | (89.9%) | 5.4% |
| missing data | 8 | (1.0%) | 1 | (0.5%) | ||||||
| Mechanism of Injury, penetrate, n (%) | 50 | (8.4%) | 9 | (7.8%) | 2.0% | 9 | (5.1%) | 9 | (5.1%) | 0.0% |
| missing data | 225 | (27.4%) | 93 | (44.7%) | ||||||
| Emergency call to ambulance arrival, mins, median (IQR) | 7 | (4) | 7 | (4) | 0.8% | 7 | (5) | 7 | (4) | 5.7% |
| missing data | 59 | (7.2%) | 18 | (8.7%) | ||||||
| CPR duration before hospital arrival, mins, median (IQR) | 21 | (11) | 22 | (10) | 20.7% | 21 | (11) | 22 | (10) | 13.9% |
| missing data | 59 | (7.2%) | 18 | (8.7%) | ||||||
