Table 2. Evaluation of the quantitative level of anti-PGL-Tb1 and anti-ESAT-6/CFP10 antibodies in patients with active TB stratified by HIV status and center of enrolment.

	HIV-infected			HIV-non-infected*
		Median OD (IQR)			Median OD (IQR)
Center	N	PGL-Tb1	ESAT-6/CFP10	N	PGL-Tb1	ESAT-6/CFP10
Hinduja	50	0.161 (0.119–0.260)	0.140 (0.084–0.203)	190	0.107 (0.075–0.160)	0.085 (0.060–0.109)
AIIMS	29	0.280 (0.169–0.458)	0.127 (0.066–0.247)	94	0.124 (0.071–0.441)	0.079 (0.049–0.146)
Safdarjung	1	0.845 (0.845–0.845)	0.310 (0.310–0.310)	119	0.096 (0.055–0.182)	0.062 (0.035–0.091)
JALMA	0	NA	NA	99	0.144 (0.091–0.255)	0.063 (0.038–0.101)
NIMS	4	0.301 (0.107–0.664)	0.133 (0.068–0.250)	49	0.118 (0.060–0.210)	0.054 (0.032–0.107)
TRC	18	0.173 (0.088–0.417)	0.094 (0.058–0.192)	125	0.103 (0.069–0.172)	0.067 (0.52–0.090)

Footnotes: TB: tuberculosis; HIV: human immunodeficiency virus; LTBI: latent tuberculosis infection; N; number of serum tested; OD: optical density; IQR (interquartile range).

*HIV non-infected corresponds to the true HIV-uninfected and HIV-unknown patients with active TB.