Table 2. Correlation between the results of the semiquantitative Xpert MTB/RIF test and those of sputum smear microscopy (N = 678).a,*.
| Sputum smear microscopy | Xpert MTB/RIF test | ||||
|---|---|---|---|---|---|
| Results | Very low | Low | Medium | High | Total |
| Negative | 175 (92.6) | 76 (31) | 3 (5.3) | 0 | 254 (37.5) |
| Positiveb | 14 (7.4) | 0 | 0 | 0 | 14 (2.0) |
| 1+ | 0 | 169 (69) | 15 (26.3) | 0 | 184 (27.1) |
| 2+ | 0 | 0 | 39 (68.4) | 45 (24.1) | 84 (12.4) |
| 3+ | 0 | 0 | 0 | 142 (75.9) | 142 (30.0) |
| Total | 189 (100) | 245 (100) | 57 (100) | 187 (100) | 678 (100) |
a
Values expressed as n (%). b1-9 bacilli/100 fields). *Weighted kappa = 0.82 (strong agreement).