Table 2.

Comparison of IgG antibody titers against M. tuberculosis (Mtb) antigens between healthcare workers and patients with active TB

			Healthcare workers
	Active TB	No Mtb infection	Recent LTBI	Remote LTBI	Serodiagnosis (+)
Number (M:F)	15 (8:7)	19 (5:14)	13 (3:10)	12 (3:9)	15 (5:10)
Age, y	47 ± 18.1 (23–78)	44 ± 9.8 (27–58)	43 ± 10.3 (24–58)	50 ± 6.4 (38–58)	44 ± 7.5 (28–57)
Antigens	Antibody titers (ΔOD)
ESAT6	0.49 ± 0.56	0.04 ± 0.02#	0.31 ± 0.41	0.07 ± 0.07*	0.04 ± 0.02$
CFP10	0.48 ± 0.49	0.12 ± 0.1#	0.24 ± 0.24	0.24 ± 0.24	0.21 ± 0.16
Acr	0.84 ± 0.51	0.15 ± 0.07#	0.38 ± 0.28*	0.26 ± 0.15#	0.25 ± 0.18$
MDP1	1.52 ± 0.86	0.27 ± 0.12#	0.86 ± 0.43*	0.33 ± 0.15#	0.38 ± 0.13#
Ag85A	1.93 ± 0.87	0.76 ± 0.29#	1.01 ± 0.87*	1.02 ± 0.44$	0.91 ± 0.47&
QFT‐Gold		(‐):15, ( ± ):4, ( + ):0	(‐):0, ( ± ):0, ( + ):13	(‐):0, ( ± ):0, ( + ):12	(‐):13, ( ± ):2, ( + ):0
TBGL (unit/mL)		0.20 ± 0.34	1.62 ± 2.06	1.88 ± 2.59	5.08 ± 6.44
LAM		(‐):19, ( + ):0	(‐):9, ( + ):4	(‐):9, ( + ):3	(‐):5, ( + ):10
GPL‐core (unit/mL)		0.01 ± 0.02	0.05 ± 0.05	0.01 ± 0.01	0.03 ± 0.03

Abbreviations: ΔOD, optical density (average ± SD); M:F, male:female.

P‐values between active TB and other groups:

ESAT6 (#: P = 0.0006, *: P = 0.0071, $: P = 0.0014)

CFT10 (#: P = 0.0033).

Acr (#: P < 0.0001, *: P = 0.0005)

MDP1 (#: P < 0.0001, *: P = 0.0015)

Ag85A (#: P < 0.0001, *: P = 0.0017, $: P = 0.0027, &: P < 0.0001)