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Table 2 Positive predictive value and negative predictive value of different cutoff values

From: A novel multi-epitope recombined protein for diagnosis of human brucellosis

Cutoff value Positive Negative PPV (%) NPV (%)
TP FN TN FP
≥0.3865a 135 11 93 9 93.75 89.42
≥0.5730b 127 19 82 20 80.89 81.19
  1. TP, true positives; TN, true negatives; FP, false positives; FN, false negatives; PPV, positive predictive value (TP/TP + FP) × 100; NPV, negative predictive value (TN/TN + FN) × 100
  2. acutoff value is calculated by rOMP ELISA
  3. bcutoff value is calculated by antigen of SAT ELISA