Table 3 Risk of ICU mortality in the development and validation cohorts according to risk stratification
Risk stratification | n (%) | Predicted ICU mortality % (95% CI) | Actual ICU mortality % |
|---|---|---|---|
Midwest development cohort | Â | Â | Â |
 Low | 1126 (26.6) | 1.3 (1.2–1.3) | 1.2 |
 Moderate | 1836 (43.3) | 6.1 (5.8–6.4) | 6.3 |
 High | 1105 (26.1) | 22.7 (21.7–23.0) | 23.3 |
 Very high | 169 (4.0) | 66.8 (65.1–67.9) | 66.9 |
West validation cohort | Â | Â | Â |
 Low | 789 (24.8) | 1.8 (1.7–1.8) | 1.8 |
 Moderate | 1302 (40.9) | 7.3 (7.1–7.4) | 7.3 |
 High | 908 (28.5) | 25.0 (24.5–26.6) | 26.2 |
 Very high | 186 (5.8) | 66.3 (64.6–68.0) | 66.7 |
South validation cohort | Â | Â | Â |
 Low | 816 (24.5) | 1.4 (1.3–1.4) | 1.3 |
 Moderate | 1424 (42.7) | 6.4 (6.4–6.5) | 6.5 |
 High | 915 (27.5) | 27.6 (27.1–28.4) | 28.3 |
 Very high | 178 (5.3) | 58.6 (57.6–59.6) | 59.0 |
Wenzhou validation cohort | Â | Â | Â |
 Low | 462 (24.6) | 2.4 (2.3–2.5) | 2.4 |
 Moderate | 746 (39.7) | 8.2 (7.7–8.3) | 8.2 |
 High | 564 (30.0) | 22.7 (21.8–23.4) | 23.4 |
 Very high | 106 (5.7) | 60.0 (57.7–62.7) | 60.4 |