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Table 3 Risk of ICU mortality in the development and validation cohorts according to risk stratification

From: Development and validation of a score to predict mortality in ICU patients with sepsis: a multicenter retrospective study

Risk stratification n (%) Predicted ICU mortality % (95% CI) Actual ICU mortality %
Midwest development cohort    
 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    
 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    
 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    
 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
  1. The risk category was calculated by adding the points for each of the following risk factors. The prognostic index was categorized in four groups: low risk (0–6 points), moderate risk (> 6– ≤ 10 points), high risk (> 10– ≤ 15 points), and very high risk (> 15 points)