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Table 4 Prediction of mortality or dialysis

From: The urine output definition of acute kidney injury is too liberal

  Dialysis-free survival Mortality or dialysis Total  
AKICr     
   No-AKICr 397 50 447 NPV = 89%
   AKICr 201 77 278 PPV = 28%
   Total 598 127 725  
  Sp = 66% Sn = 61%   
Urine output     
   ≥0.31 ml/kg/hour 462 50 512 NPV = 90%
   <0.31 ml/kg/hour 136 77 213 PPV = 34%
   Total 598 127 725  
  Sp = 77% Sn = 61%   
  1. AKICr, acute kidney injury by the creatinine definition; NPV, negative predictive value; PPV, positive predictive value; Sn, sensitivity; Sp, specificity.