| TB prevalence % | PPV % | NPV% | True positive¶ | False negative¶ | False positive¶ | True negative¶ |
| 1 | 48 | 100 | 9.1 | 0.9 | 9.9 | 980.1 |
| 2 | 65 | 100 | 18.2 | 1.8 | 9.8 | 970.2 |
| 3 | 74 | 100 | 27.3 | 2.7 | 9.7 | 960.3 |
| 4 | 79 | 100 | 36.4 | 3.6 | 9.6 | 950.4 |
| 5 | 83 | 100 | 45.5 | 4.5 | 9.5 | 940.5 |
| 6 | 85 | 99 | 54.6 | 5.4 | 9.4 | 930.6 |
| 7 | 87 | 99 | 63.7 | 6.3 | 9.3 | 920.7 |
| 8 | 89 | 99 | 72.8 | 7.2 | 9.2 | 910.8 |
| 9 | 90 | 99 | 81.9 | 8.1 | 9.1 | 900.9 |
| 10 | 91 | 99 | 91 | 9 | 9 | 891 |
| 11 | 92 | 99 | 100.1 | 9.9 | 8.9 | 881.1 |
| 12 | 93 | 99 | 109.2 | 10.8 | 8.8 | 871.2 |
| 13 | 93 | 99 | 118.3 | 11.7 | 8.7 | 861.3 |
| 14 | 94 | 99 | 127.4 | 12.6 | 8.6 | 851.4 |
| 15 | 94 | 98 | 136.5 | 13.5 | 8.5 | 841.5 |
| 20 | 96 | 98 | 182 | 18 | 8 | 792 |
| 25 | 97 | 97 | 227.5 | 22.5 | 7.5 | 742.5 |
PPV: positive predictive value; NPV: negative predictive value. #: according to varying TB prevalences in a sample population of 1000 individuals; ¶: sensitivity (91%) and specificity (99%) for Xpert MTB/RIF TB detection, compared with reference method (culture).