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Comparison of diagnostic results with the "truth"
(CSE -PROGRAM DIAE2)
Total accuracy = ?di / 1220 (i=NL, LVH, RVH, BVH, AMI, IMI, MIX, VH+MI)
(di = diagonal element T[i,i] of the table T)
Partially correct = ( ?di + ? BVHj + ? MIXk ) / 1220 (i=NL, LVH, RVH, BVH, AMI, IMI, MIX, VH+MI)
j=LVH,RVH; k=AMI, IMI
Acc(2) = ? di / 1063 (i=NL, LVH, RVH, AMI, IMI)
Acc(3) = (? di + ? BVHj + ?MIXk) / 1063 (i=NL, LVH, RVH, AMI, IMI)
  j=LVH,RVH; k=AMI, IMI
  NL ABN Computer result  
NL True
Positive
False
Negative
   
ABN False
Positive
True
Negative
   
"truth"        
Sensitivity = TP / (TP + FN)        
Specificity = TN / (FP + TN)        
         
Predictive value of positive test = TP / (TP + FP)        
Predictive value of negative test = TN / (FN + TN)        
 
Comparison of diagnostic results with COMBINED REFEREE results
(CSE - program MCKLIC2)
"Truth" = NL NL ABN Computer result  
NL Both
Present
Algr+/AlgX-    
ABN Algr-/AlgX+ Both
Absent
   
Reference        
         
Both Present = Reference and program correct        
Algr+/AlgX- = Reference correct and program incorrect        
Both Absent = Reference and program incorrect        
Algr-/AlgX+ = Reference incorrect and program correct        
         
Agreement:        
Sensitivity = Both present / (Both present + Algr+/AlgX-)        
Specificity = Both absent / ( Both absent + Algr-/AlgX+)        
         
Predictive value of positive test = Both present + Algr-/AlgX+)        
Predictive value of negative test = Both absent / (Both absent + Algr+/AlgX-)        
Please contact Numed if you require more data.


 

 
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