Table 1. Relative risk of TST conversion for ELISpot-positive, TST-negative contacts.

	ESAT-6		CFP-10		Rv3873		Rv3878		Rv3879c		PPD		SKSDa
Test result	positive	negative	positive	negative	positive	negative	positive	negative	positive	negative	positive	negative	positive	negative
TST conversion b	3	38	4	37	7	34	3	38	8	33	26	15	21	20
TST non-conversion	25	244	19	250	17	252	10	259	24	245	114	155	159	110
Cumulative percentage risk of conversion (95% CI)	10.7	13.5	17.4	12.9	29.2	11.9	23.1	12.8	25	11.9	18.6	8.8	11.7	15.4
	(2.2, 28.2)	(9.7, 18.0)	(5.0, 38.8)	(9.2, 17.3)	(12.6, 51.1)	(8.4, 16.2)	(5.0, 53.8)	(9.2, 17.1)	(11.5, 43.4)	(8.3, 16.3)	(12.5, 26.0)	(5.0, 14.1)	(7.4, 17.3)	(9.6, 22.8)
Relative risk of conversion (95% CI)	0.80 (0.26, 2.41)		1.35 (0.53, 3.45)		2.45 (1.22, 4.93)		1.80 (0.64, 5.08)		2.11 (1.07, 4.16)		2.10 (1.16, 3.82)		0.76 (0.43, 1.34)
P value	0.68		0.54		0.02		0.28		0.04		0.01		0.34

^aStreptokinase streptodornase (SKSD), a non-tuberculosis control antigen.

^bTST conversion defined as an increase in induration of ≥10 mm between the 1st and 2nd TST where the first TST was <5 mm.