TABLE 2.
Combination Test Results by Age Group and Nativity
| Test Result Combination | All Ages | <2 y | 2–4 y | 5–9 y | 10–14 y |
|---|---|---|---|---|---|
|
| |||||
| Born in the United States | |||||
| Two test combinations | |||||
| TST+ and IGRA+a, n (%) | 43 (15.0)b | 0 (0.0) | 9 (18.4) | 18 (16.8) | 16 (14.6) |
| TST+ and IGRA−c, n (%) | 14 (4.9)b | 0 (0.0) | 2 (4.1) | 6 (5.6) | 6 (5.5) |
| TST− and IGRA+, n (%) | 9 (3.1) | 1 (4.8) | 0 (0.0) | 2 (1.9) | 6 (5.5) |
| TST−and IGRA−, n (%) | 221 (77.0) | 20 (95.2) | 38 (77.6) | 81 (75.7) | 82 (74.6) |
| Three test combinations | |||||
| Triple +d, n (%) | 31 (10.9) | 0 (0.0) | 6 (12.2) | 14 (13.2) | 11 (10.1) |
| Triple −e, n (%) | 218 (76.8) | 19 (95.2) | 38 (77.6) | 80 (75.5) | 81 (74.3) |
| Born outside of the United States | |||||
| Two test combinations | |||||
| TST+ and IGRA+, n (%) | 263 (8.0)b | 1 (0.5) | 22 (3.5) | 79 (6.8) | 161 (12.3) |
| TST+ and IGRA−, n (%) | 638 (19.3)b | 64 (32.5) | 132 (20.9) | 168 (14.4) | 274 (20.9) |
| TST−and IGRA+, n (%) | 54 (1.6) | 1 (0.5) | 5 (0.8) | 22 (1.9) | 26 (2.0) |
| TST− and IGRA−, n (%) | 2349 (71.1) | 131 (66.5) | 472 (74.8) | 897 (76.9) | 849 (64.8) |
| Three test combinations | |||||
| Triple +, n (%) | 195 (6.1) | 1 (0.5) | 11 (1.8) | 61 (5.4) | 122 (9.7) |
| Triple −, n (%) | 2272 (70.9) | 126 (66.3) | 458 (74.2) | 872 (76.6) | 816 (64.7) |
−, negative; +, positive.
a
QFT-GIT–positive or T-SPOT–positive result.
b
P < .001 for comparison of born in the Unites States to not born in the United States.
c
QFT-GIT–negative and T-SPOT–negative results.
d
TST-positive, QFT-GIT–positive, and T-SPOT–positive results.
e
TST-negative, QFT-GIT–negative, and T-SPOT–negative results.