| Trauma centre | Overall, adjusted† mortality rate (95% CI) | Patient subgroup, adjusted† mortality rate (95% CI) | ||||
|---|---|---|---|---|---|---|
| Shock‡ | Penetrating truncal injury | Blunt multisystem injury | Older (≥ 65 yr) | Isolated severe TBI | ||
| 1 | 0.59 (0.45–0.77) | n/a | 1.09 (0.84–1.40) | 0.67 (0.49–0.92) | 0.60 (0.42–0.85) | 0.40 (0.27– 0.61) |
| 2 | 0.69 (0.49– 0.96) | n/a | 0.99 (0.75–1.30) | 0.77 (0.47–1.24) | 0.54 (0.35–0.82) | 0.69 (0.44–1.08) |
| 3 | 0.98 (0.73–1.32) | n/a | 0.97 (0.74–1.27) | 1.19 (0.80–1.76) | 1.05 (0.73–1.50) | 1.05 (0.71–1.56) |
| 4 | 1.15 (0.81–1.54) | n/a | 1.00 (0.76–1.31) | 0.87 (0.55–1.36) | 1.14 (0.77–1.69) | 0.13 (0.73–1.74) |
| 5 | 0.83 (0.63–1.10) | n/a | 0.98 (0.76–1.27) | 0.87 (0.61–1.24) | 0.82 (0.57–1.18) | 0.91 (0.62–1.33) |
| 6 | 1.26 (0.97–1.63) | n/a | 1.00 (0.76–1.30) | 1.16 (0.83–1.62) | 1.14 (0.83–1.60) | 1.31 (0.94–1.85) |
| 7 | 1.37 (1.05–1.80) | n/a | 1.01 (0.77–1.31) | 1.51 (1.08–2.09) | 1.37 (0.97–1.93) | 1.46 (1.00–2.12) |
| 8 | 1.12 (0.80–1.53) | n/a | 0.99 (0.76–1.30) | 0.85 (0.55–1.32) | 1.40 (0.95–2.08) | 1.31 (0.84–2.03) |
| 9 | 1.42 (1.08–1.87) | n/a | 0.99 (0.75–1.29) | 1.46 (1.03–2.07) | 1.46 (1.04–2.05) | 1.38 (0.95–2.01) |
| Median odds ratio | 1.26 | n/a | 1.14 | 1.38 | 1.45 | 1.49 |
Note: CI = confidence interval, TBI = traumatic brain injury. *Light grey shading highlights trauma centres where the upper limit of the 95% confidence interval for in-hospital mortality rate was < 1 (mortality lower than expected , i.e., lower adjusted likelihood of death compared with the other centres). Darker shading shows trauma centres with lower limits of the confidence interval > 1 (significantly higher than expected mortality). † Adjusted for gender, age, mechanism of injury, vital signs on arrival, injury severity and transfer status (as defined in Box 1). ‡After excluding transfers, variance in the random statement of the shock model was estimated to be 0; thus, random statements were removed from this model.