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Table 2 Sensitivities and specificities of Xpert MTB/RIF, CTM-MTB and DTB

From: Comparison of Xpert MTB/RIF with ProbeTec ET DTB and COBAS TaqMan MTB for direct detection of M. tuberculosis complex in respiratory specimens

  % sensitivity (95% CI) % specificity (95% CI)
  All MIC pos MIC neg  
Cx pos Cx pos Cx pos no TB
Xpert MTB/RIF 74.6 94.1 68.0 96.2
(62.2-84.1) (69.2-99.7) (53.1-80.0) (85.9-99.3)
CTM MTB 73.8 93.3 68.0 100
(61.2-83.6) (66.0-99.6) (53.1-80.0) (91.2-100)
DTB 79.1 100 72.0 98.1
(67.1-87.7) (77.0-100) (57.2-83.3) (88.6-99.9)
  1. Cx culture (fluid or solid media), MIC smear microscopy, CI confidence interval.