| HEMS | GEMS | P-value |
---|---|---|---|
TRISS | Â | ||
Number of cases | 2,949 | 4,467 | Â |
Expected mortality | 20.4% | 17.5% | - |
Observed mortality | 13.8% | 14.4% | Â |
Standardized Mortality Ratio (95% CI) | 0.678 (0.617 to 0.739) | 0.825 (0.766 to 0.884) | 0.0011 |
RISC | Â | ||
Number of cases | 4,575 | 7,469 | Â |
Expected mortality | 18.3% | 17.2% | - |
Observed mortality | 14.6% | 14.9% | Â |
Standardized Mortality Ratio (95% CI) | 0.798 (0.742 to 0.854) | 0.869 (0.822 to 0.916) | 0.062 |