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Table 2 Comparative statistics of HCV antibody status by ELISA and RIBA

From: Characterization of differential antibody production against hepatitis C virus in different HCV infection status

  Groups tested, n
  HCW Presumably uninfected p Presumably uninfected Chronic p HCW Chronic p
ELISA          
 negative 0 5   5 0   0 0  
 indeterminate 0 39   39 0   0 0  
 positive 77 12   12 34   77 34  
RIBA          
 negative 19 4   4 1   19 1  
 indeterminate 3 23 <0.001 23 2 <0.001 3 2 0.044
 positive 55 29   29 31   55 31  
ELISA + RIBA          
 true positive 55 27   27 31   55 31 0.022
 false positive 22 5 <0.001 5 3 <0.001 22 3
 indeterminate 0 19   19 0   0 0  
 false negative 0 5   5 0   0 0