Table 1.
Patient classification, HIV prevalence and Xpert MTB/RIF Assay results for each patient group.
Table 2.
Comparison of Xpert MTB/RIF Assay and other methods with reference standard for both HIV-positive and -negative participants.
Table 3.
Comparison of Xpert MTB/RIF Assay and other methods with reference standard in HIV-positives only.
Figure 1.
Cycle threshold (Ct-value) versus grade of smear-positivity.
Ct versus degree of smear positivity, coded as negative = 0, scanty = 1, 1+ = 2 etc (regression coefficient β = −5.02, 95%CI = −7.44 to −2.60). Ct for Xpert MTB/RIF Assay negatives was coded as 40.
Figure 2.
Cycle threshold (Ct-value) versus time to positivity in MGIT liquid culture.
Ct versus days from inoculation into MGIT liquid culture to culture positivity as reported by the MGIT instrument (β = 1.19, 95%CI = 0.98 to 1.39). Ct for Xpert MTB/RIF Assay negatives was coded as 40.