Table 2.
Comparison of sensitivity, specificity, etc. between sputum and BALF for the diagnosis of pulmonary TB in sputum-smear-negative suspects
| Positive detectable rate (%) | Sensitivity (%) | Specificity (%) | Accuracy (%) | |
|---|---|---|---|---|
| Sputum-culture/NAAT | 32.4 | 43.5 | 100.0 | 58.0 |
| sputum-culture | 26.1 | 35.1 | 100.0 | 51.7 |
| sputum-NAAT | 20.7 | 27.7 | 100.0 | 46.2 |
| BALF-smear/culture/NAAT | 47.2 | 63.4 | 100.0 | 72.8 |
| BALF-smear | 9.2 | 12.0 | 99.2 | 34.3 |
| BALF-culture | 42.5 | 57.1 | 100.0 | 68.0 |
| BALF-NAAT | 33.2 | 44.5 | 99.7 | 58.6 |
| Sputum+BALF | 50.9 | 68.4 | 100.0 | 72.8 |
TB tuberculosis, BALF bronchoalveolar lavage fluid, NAAT nucleic acid amplification test