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Table 4 Sensitivity, Specificity, True Positive and True Negative values of various tests

From: ELISA is superior to bacterial culture and agglutination test in the diagnosis of brucellosis in an endemic area in China

 Sensitivity (95%CI)Specificity(95% CI)PPA (95%CI)NPA (95%CI)
Culture0.217 (0.167,0.276)1.000 (0.981,1.000)1.000 (0.913,1.000)0.574 (0.526,0.621)
STA0.638 (0.573,0.0.699)0.935 (0.895,0.961)0.903 (0.845,0.942)0.732 (0.679,0.779)
IgM by ELISA0.609 (0.543,0.671)0.984 (0.956,0.995)0.972 (0.927,0.991)0.726 (0.675,0.773)
IgG by ELISA0.961 (0.926,0.981)1.000 (0.981,1.000)1.000 (0.979,1.000)0.964 (0.932,0.983)
IgM + IgG by ELISA0.987 (0.960,0.997)0.984 (0.956,0.995)0.983 (0.954,0.994)0.987 (0.962,0.997)
  1. Note: STA: standard tube agglutination. PPA: positive percent agreement. NPA:negative percent agreement