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Table 4 Performance metrics

From: Are 5-level triage systems improved by using a symptom based approach?—a Danish cohort study

Performance metrics DEPT VITAL-TRIAGE Triage categories
24-h ICU admission    
 Sensitivity 0.79 (CI 0.78: 0.80) 0.44 (CI 0.41: 0.47) High-urgency categories
 Specificity 0.82 (CI 0.82: 0.82) 0.96 (CI 0.96: 0.96)  
 Positive predictive value 0.05 (CI 0.05: 0.06) 0.13 (CI 0.12: 0.14)  
 Negative predictive value 0.99 (CI 0.99: 0.99) 0.99 (CI 0.99: 0.99)  
2-day mortality    
 Sensitivity 0.69 (CI 0.67: 0.70) 0.37 (CI 0.34: 0.41) High-urgency categories
 Specificity 0.81 (CI 0.81: 0.82) 0.96 (CI 0.96: 0.96)  
 Positive predictive value 0.02 (CI 0.02: 0.03) 0.06 (CI 0.06: 0.07)  
 Negative predictive value 0.99 (CI 0.99: 0.99) 0.99 (CI 0.99: 0.99)  
Critical illness    
 Sensitivity 0.48 (CI 0.47: 0.50) 0.09 (0.08: 0.10) High-urgency categories
 Specificity 0.85 (CI: 0.84: 0.85) 0.96 (CI 0.96: 0.96)  
 Positive predictive value 0.05 (CI 0.04: 0.05) 0.06 (CI 0.06: 0.07)  
 Negative predictive value 0.99 (CI 0.99: 0.99) 0.97 (CI 0.97: 0.97)  
Surgery within 48 h    
 Sensitivity 0.30 (CI 0.30: 0.31) 0.04 (CI 0.04: 0.04) High-urgency categories
 Specificity 0.82 (CI 0.82: 0.82) 0.96 (CI 0.95: 0.96)  
 Positive predictive value 0.16 (CI 0.16: 0.16) 0.12 (CI 0.11: 0.13)  
 Negative predictive value 0.92 (CI 0.92: 0.92) 0.87 (CI 0.87: 0.87)  
4-h discharge    
 Sensitivity 0.91 (CI 0.91: 0.92) 0.99 (CI 0.99: 0.99) Low-urgency categories
 Specificity 0.29 (CI 0.29: 0.29) 0.06 (CI 0.06: 0.06)  
 Positive predictive value 0.56 (CI 0.56: 0.56) 0.33 (CI 0.32: 0.33)  
 Negative predictive value 0.78 (CI 0.77: 0.78) 0.91 (CI 0.90: 0.92)  
  1. Table of performance metrics for each triage system. Corresponding 95% confidence intervals are presented. The triage categories examined are shown in the right column