Table 3.
The diagnostic performance of five methods in EPTB.
| Methods | Results | CRS | Sensitivity | Specificity | PPV | NPV | Kappa | |
|---|---|---|---|---|---|---|---|---|
| EPTB | Non-TB | |||||||
| smear | positive | 3 | 0 | 7.14%* | 100.00% | 100.00% | 48.68% | 0.067 |
| negative | 39 | 37 | ||||||
| culture | positive | 11 | 0 | 26.19% | 100.00% | 100.00% | 54.41% | 0.249 |
| negative | 31 | 37 | ||||||
| RNA | positive | 4 | 0 | 9.52%* | 100.00% | 100.00% | 49.33% | 0.090 |
| negative | 38 | 37 | ||||||
| Xpert | positive | 14 | 0 | 33.33% | 100.00% | 100.00% | 56.92% | 0.319 |
| negative | 28 | 37 | ||||||
| LAM | positive | 17 | 0 | 40.48% | 100.00% | 100.00% | 59.68% | 0.389 |
| negative | 25 | 37 | ||||||
CRS, composite reference standard; EPTB, extrapulmonary tuberculosis; PPV, positive predictive value; NPV, negative predictive value; RNA, ribonucleic acid; TB, tuberculosis; LAM, lipoarabinomannan; *p < 0.05, Compared to LAM.