Table 1.

Subject characteristics.

		IGRA+ group	IGRA- Healthy control group
Number		18	4
Age in years: Median (IQR)		34 (28–38)	28 (27–29)
Gender	Male	10 (56%)	3 (75%)
	Female	8 (44%)	1 (25%)
Confirmed recent drug-susceptible TB exposure	Yes	15 (83%)	0 (0%)
	No	3 (17%)	4 (100%)
BCG	Yes	14 (78%)	2 (50%)
	No	2 (11%)	2 (50%)
	Unknown	2 (11%)	0 (0%)
Continent of Birth	Africa	4 (22%)	0 (0%)
	Asia	4 (22%)	0 (0%)
	Australasia	0 (0%)	1 (25%)
	Europe	9 (50%)	2 (50%)
	North America	0 (0%)	1 (25%)
	South America	1 (6%)	0 (0%)
	Unknown	0 (0%)	0 (0%)
Ethnicity	Asiana	5 (28%)	2 (50%)
	Blackb	4 (22%)	0 (0%)
	Whitec	8 (44%)	2 (50%)
	Otherd	1 (6%)	0 (0%)

^aIncludes Bengali, Hong Kong, Kurdish, Sri Lankan, Turkish.

^bIncludes Black African.

^cIncludes White British, Polish, Romanian, White other.

^dIncludes Latin American, Unknown.