Diagnostic accuracy of the Xpert MTB/RIF assay using sputum specimens for the diagnosis of pulmonary tuberculosis (Bacteriologically confirmed cases).

†Confidence interval.In 20 patients, the Xpert MTB/RIF assay with sputum was positive but M. tuberculosis was not cultured. Because the clinical features and radiologic findings of these patients were suggestive of pulmonary TB, these patients were treated with anti-TB drugs. These patients were excluded from the calculation of the sensitivity, specificity, positive predictive value, and negative predictive value.