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Table 3 The sensitivity, specificity, positive predictive value, and negative predictive value of a positive ANCA for subsequent relapse and a negative ANCA for relapse-free survival

From: Negative anti-neutrophil cytoplasm antibody at switch to maintenance therapy is associated with a reduced risk of relapse

  Positive ANCA and relapse Negative ANCA and no relapse
Sensitivity 0.55 0.64
Specificity 0.63 0.55
Positive predictive value 0.50 0.68
Negative predictive value 0.68 0.50
  1. ANCA anti-neutrophil cytoplasm antibodies