Skip to main content

Table 3 Reclassification results for in-hospital and ICU mortality

From: Red cell distribution width improves the simplified acute physiology score for risk prediction in unselected critically ill patients

  Hospital mortality ICU mortality
  SAPS SAPS and RDW SAPS versus SAPS/RDW P SAPS SAPS and RDW SAPS versus SAPS/RDW P
Model χ2 (log likelihoods) 1,505 1,831 326 < 0.0001 1,539 1,664 124 < 0.0001
Area under the ROC curve 0.746 0.774 0.028 < 0.001 0.793 0.805 0.012 < 0.001
Events         
   Upward reclassification    362     197  
   No reclassification    1,214     947  
   Downward reclassification    309     153  
No events         
   Upward reclassification    1,532     1,376  
   No reclassification    9,849     12,412  
   Downward reclassification    4,046     2257  
Net reclassification improvement    0.175 (SE 0.015) < 0.0001    0.090 (SE 0.049) < 0.0001
Integrated sensitivity 0.20 0.23 0.021 < 0.0001 0.19 0.20 0.01 < 0.0001
Integrated specificity 0.099 0.096 -0.0026 < 0.0001 0.07 0.06 -0.0008 < 0.0001
Integrated discrimination improvement    0.023 (SE 0.001) < 0.0001    0.011 (SE 0.001) < 0.0001