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Table 4 Diagnostic validation of different tests using nested PCR as gold standard (all values are in percentage).

From: Immunohistochemical diagnosis of abdominal and lymph node tuberculosis by detecting Mycobacterium tuberculosis complex specific antigen MPT64

Diagnostic method Sensitivity Specificity PPV NPV
LYMPH GLAND TB     
Anti-BCG 88 86 94 76
Anti-MPT64 93 98 99 85
ABDOMINAL TB     
Anti-BCG 86 81 86 81
Anti-MPT64 89 95 96 87
TOTAL TB CASES     
Anti-BCG 88 85 92 78
Anti-MPT64 92 97 98 85
  1. PPV = positive predictive value, NPV = negative predictive value