Table 2.

Incidence rate and incidence rate ratio of the tested groups for progression to active tuberculosis.

	Number	Active TB	Progression to disease, years	Incidence rate per 1000 person-years	Incidence rate ratio (95% CI)
QFT-GIT results
Negative	52	0	104	0	–
Positive with INH prophylaxis	3	0	6	0	–
Positive without INH prophylaxis	7	3	12	250.0	1
Indeterminate	27	1	54	18.5	0.1 (0.01–0.71)*

^*p < 0.05.

CI, confidence interval; INH, Isoniazid; QFT-GIT, QuantiFERON-TB Gold in-Tube; TB, tuberculosis.