Table 4 Sensitivity and specificity of Truenat assay by smear and HIV status by any culture as a reference standard

Smear status

Smear negative

14/23 (60.9, 38.5–80.2)

155/164 (95.1, 90.5–97.8)

Smear positive

45/50 (90.0, 78.1–96.6)

4/6(66.7, 22.2–95.6)

HIV status

HIV-positive

16/20 (80.0, 56.3–94.2)

81/85 (95.3, 88.3–98.7)

HIV- negative

42/51 (82.3, 69.1–91.6)

77/83 (93.0, 84.9–97.3)

Previous history of TB

History of TB

9/12 (75.0, 42.8–94.5)

31/35 (88.6, 73.2–96.7)

No history of TB

50/61(82.0, 70.0–90.6)

128/134 (95.5, 90.5–98.3)

History of smoking

Never smoked

35/45 (77.8, 62.9–88.7)

121/127 (95.3, 90.0–98.2)

Ever smoked

24/28 (85.7, 67.3–95.9)

37/41 (90.2, 76.8–97.2)

Stopped smoking

14/16 (87.5, 61.6–98.4)

19/22 (86.4, 65.0–97.0)

Current smoker

11/13 (84.6, 54.5–98.0)

17/18 (94.4, 72.7–99.8)