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Table 5 Clinical validation of novel mortality scores

From: Prediction of mortality in adult patients with severe acute lung failure receiving veno-venous extracorporeal membrane oxygenation: a prospective observational study

Predicted risk N Mean predicted risk Observed mortality risk Clinical validation PSEP (95% CI)
Model 1      57 (31 to 84)
<40% 159 22.7% 24.5% 75.5%a  
40% to 80% 114 56.2% 54.5%   
>80% 11 86.6% 81.8% 81.8%b  
Total population    38.7%   
Model 2      61 (43 to 80)
<40% 148 15.7% 19.6% 80.4%a  
40% to 80% 94 56.9% 57.4%   
>80% 21 87.1% 81.0% 81.0%b  
Total population    38.0%   
  1. aNegative predictive value for the low-risk group (<40%). bPositive predictive value for the high-risk group (>80%). CI, confidence interval; n, number of patients in risk group; PSEP, prognostic separation index.