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Table 4 The positive and negative predictive values of three serological tests

From: Latent class evaluation of three serological tests for the diagnosis of human brucellosis in Bangladesh

Test Variable Livestock farmer (95 % CrI) Prevalence: 1.1 % PP patients (95 % CrI) Prevalence: 1.7 %
iELISA PPV (%) 36.3 (5.6–70.5) 41.4 (6.6–76.1)
NPV (%) 99.6 (98.9–99.9) 99.5 % (98.6–99.9)
Rose Bengal PPV (%) 29.9 (3.6–69.5) 42.7 (6.4–83.2)
NPV (%) 99.8 (99.2–99.9) 99.6 % (98.8–99.9)
Standard tube agglutination PPV (%) 27.9 (3.6–62.0) 39.8 (6.0–75.2)
NPV (%) 99.8 (99.3–99.9) 99.6 % (98.9–99.9)
  1. PPV positive predictive value, NPV negative predictive value, CrI credibility interval