Table 4. Factors associated with “false positive” detection of M. tuberculosis by Xpert MTB/RIF.
| False-positive Xpert result for detection ofM. tuberculosis | Odds Ratio | |
| N (row %) | 95% CIb | |
| No current or prior TB treatment | 10/5764a (0.2) | 1 |
| Current TB treatment | 8/58 (13.8) | 92.1 (34.9, 243.0) |
| Prior but not current TB treatment | 9/797 (1.1) | 6.6 (2.7, 16.2) |
Abbreviations: CI, confidence interval.
a
four participants who reported not being on current TB treatment but did not know if they had ever been on TB treatment were coded as “no current or prior TB treatment”.
b
overall P-value <0.001.