Table 3.
the strength of agreement between TST and IGRA in the diagnosis of LTBI in HIV infected patients based on CD4 count values
| TST Positive | Negative | Total | K | p value | |
|---|---|---|---|---|---|
| Variable | n (%) | n (%) | N (%) | ||
| CD4 <200 Quantiferon | |||||
| Positive | 3 (33.3) | 6 (28.6) | 9 (30.0) | 0.048 | 0.794 |
| Negative | 6 (66.7) | 15 (71.4) | 21 (70.0) | ||
| Total | 9 (100.0) | 21 (100.0) | 30 (100.0) | ||
| CD4200-350 Quantiferon | |||||
| Positive | 12 (66.7) | 6 (33.3) | 18 (40.0) | 0.444 | 0.003* |
| Negative | 6 (33.3) | 21 (66.7) | 27 (60.0) | ||
| Total | 18 (100.0) | 27 (100.0) | 45 | ||
| CD4 351 - 499 Quantiferon | |||||
| Positive | 15 (50.0) | 12 (37.5) | 27 (43.5) | 0.125 | 0.321 |
| Negative | 15 (50.0) | 20 (62.5) | 35 (56.5) | ||
| Total | 30 (100.0) | 32 (100.0) | 62 (100.0) | ||
| CD4 ≥ 500 Quantiferon | |||||
| Positive | 48 (80.0) | 51 (56.0) | 99 (65.6) | 0.216 | 0.002* |
| Negative | 12 (20.0) | 40 (44.0) | 52 934.4) | ||
| Total | 60 (100.0) | 91 (100.0) | 151(100.0) |