Table 1. Effect of LTBI status and PPD stimulation on target gene expression.

	LTBI+ vs LTBI- (PPD stimulation)		LTBI+ vs LTBI- (No stimulation)
Target gene	Ratio of proportions [C.I.]	p-value	Ratio of proportions [C.I.]	p-value
GFP	1.2 [0.7, 2.1]	0.58	1.2 [0.7, 2.1]	0.38
IFNG	2.5 [1.5, 4.3]	<0.001	0.7 [0.4, 1.1]	0.11
IL2	2.9 [1.5, 5.7]	<0.002	1.0 [0.6, 1.5]	0.95

Ratios of proportions of mRNA+CD3+ cells are shown in LTBI+ vs. LTBI- donors by PPD stimulation. Ratios of proportions and associated confidence intervals (C.I.) and p-values were calculated using a Poisson regression model, with a log-link adjusted for the total number of CD3+ cells.