TABLE 3.
Agreement of diagnostic results for the EC skin test compared to the tuberculin skin test TST (≥5 mm) and the QuantiFERON-TB Gold In-Tube test (≥0.35 IU/mL)a
| Participant category | EC skin test (≥5 mm) | QFT test (≥0.35 IU/mL) |
TST (≥5 mm) |
||||
|---|---|---|---|---|---|---|---|
| No. negative | No. positive | Consistency (95% CI) | No. negative | No. positive | Consistency (95% CI) | ||
| All participants | Negative | 251 | 38 | 88 (84.5–91.4) | 273 | 19 | 83.1 (79.2–87.1) |
| Positive | 3 | 51 | 40 | 18 | |||
| CD4 count, <500 | Negative | 194 | 30 | 88.2 (84.2–92.1) | 211 | 16 | 88.4 (84.6–92.3) |
| Positive | 1 | 37 | 15 | 26 | |||
| CD4 count, ≥500 | Negative | 57 | 8 | 87.7 (80.3–95.0) | 62 | 3 | 92.7 (86.9–98.4) |
| Positive | 2 | 14 | 3 | 14 | |||
a
EC, ESAT6-CFP10; TST, tuberculin skin test; QFT, QuantiFERON-TB Gold In-Tube test; CI, confidence interval.