Table 5. Sensitivity and specificity of LTBI by latent class analysis method.

Test	Sensitivity (95% CI)	Specificity (95% CI)
TST (T)*	76%	77%
	(56%–97%)	(57%–98%)
QFT-GIT (Q)	69%	69%
	(55%–83%)	(48%–91%)
Exposure (E)	72%	38%
	(67%–76%)	(32%–44%)

Estimated Prevalence of LTBI = 60% (95%CI: 42%–78%). Probability of being LTBI Positive: T+Q+E+ (94%), T+Q+E- (90%), T+Q-E+ (74%), T+Q-E- (65%), T-Q+E+ (56%), T-Q+E- (45%), T-Q-E+ (20%) and T-Q-E- (14%).

*TST induration cut-off used is >5mm as the cut-off. (Analysis using TST cut-off>10mm is given as S6 Table)