Test performance (including comparison to clinical case definitions) for smear microscopy, MGIT culture, MTBDRplus directly on sputum, LCTB, and Xpert MTB/RIF assays stratified by smear microscopy and HIV status.

All tests performed on the same 177 sputum specimens. Confidence intervals 95%.aAll values are percent (95% CI) unless otherwise indicated.HIV status distribution was as follows: HIV-positive, 124; HIV-negative 26; HIV status unknown, 27.bAmongst 177 cases where all tests were done, 49 were smear-positive, culture-positive; 18 were smear-negative, culture-positive; 107 were smear-negative, culture-negative; in three cases NTM was isolated.cWhere any of the three smears taken during the study period were positive.dWhere all of the three smears taken during the study period were negative.