TABLE 2.

QuantiFERON-TB (1-tube, 4-tube QFT-Plus, and QFT-GIT) proportions of positive and indeterminate results by age group

Age group	No. specimens	% Positive (95% CI)b	% Indeterminate (95% CI)
0–2	11,974	1.4 (1.19, 1.61)	3.4 (3.1, 3.7)
3–5	37,947	1.2 (1.12, 1.35)	1.7 (1.5, 1.8)
6–17	187,928	3.0 (2.88, 3.03)	1.03 (0.98, 1.07)
18–65	1,842,247	7.2 (7.16, 7.23)	1.2 (1.19, 1.23)
>65	230,569	10.0 (9.92, 10.17)	3.0 (2.9, 3.1)
Totala	2,310,665	7.0 (6.97, 7.04)	1.4 (1.38, 1.41)

^aAny records with missing age information are not included.

^bCI, confidence interval.