Table 2. QFT-Plus response among different groups.
| Variable | Active TB (n=33) | LTBI (n=30) | HC (n=27) | ||
|---|---|---|---|---|---|
| Total | AFB Cx(+) (n=16) | AFB Cx(−) (n=17) | |||
| QFT-GIT | |||||
| TB+ | 31 (93.9) | 15 (93.8) | 16 (94.1) | 30 (100.0) | 0 (0.0) |
| QFT-Plus | |||||
| TB1+ or TB2+ | 31 (93.9) | 15 (93.8) | 16 (94.1) | 26 (86.7) | 2 (7.4) |
| TB1+ | 29 (87.9) | 13 (81.3) | 16 (94.1) | 26 (86.7) | 0 (0.0) |
| TB2+ | 31 (93.9) | 15 (93.8) | 16 (94.1) | 24 (80.0) | 2 (7.4) |
| Only TB1+ | 0 (0.0) | 0 (0.0) | 0 (0.0) | 2 (6.7) | 0 (0.0) |
| Only TB2+ | 2 (6.1) | 2 (12.5) | 0 (0.0) | 0 (0.0) | 2 (7.4) |
| TB1 and TB2 | 29 (87.9) | 13 (81.3) | 16 (94.1) | 24 (80.0) | 0 (0.0) |
The numbers in brackets represent percentages in each category. AFB, acid fast bacilli; Cx, culture; n, number; LTBI, latent tuberculosis infection; HC, healthy control; QFT-GIT, QuantiFERON-TB Gold In-Tube; QFT Plus, QuantiFERON-TB Gold Plus.