Table 3 Yield of different algorithms in TB detection and utilization of tests
Algorithm | Sensitivity | Specificity | PPV | NPV | People with TB missed | Tests used |
|---|---|---|---|---|---|---|
Abnormality ≥ 0.30 | 95.3% | 29.8% | 16.9% | 97.7% | 4 | 738 |
Abnormality ≥ 0.50 | 89.4% | 62.8% | 26.4% | 97.5% | 9 | 424 |
Any cough | 62.4% | 37.4% | 12.9% | 86.9% | 32 | 639 |
Cough ≥ 2 weeks | 40% | 61.5% | 13.5% | 87.3% | 51 | 394 |
Any symptom | 90.6% | 11.4% | 13.3% | 89.1% | 8 | 906 |
Cough OR fever | 67.1% | 29.7% | 12.5% | 85.8% | 28 | 715 |
Abnormality ≥ 0.30 OR any cough | 100% | 5.9% | 13.7% | 100% | 0 | 966 |
Abnormality ≥ 0.30 OR cough ≥ 2 weeks | 100% | 13.4% | 14.7% | 100% | 0 | 896 |
Abnormality ≥ 0.30 OR any symptom | 100% | 0% | 13% | - | 0 | 1021 |
Abnormality ≥ 0.50 OR any cough | 100% | 20.5% | 15.8% | 100% | 0 | 829 |
Abnormality ≥ 0.50 OR cough ≥ 2 weeks | 97.7% | 36% | 18.6% | 99% | 2 | 682 |
Abnormality ≥ 0.50 OR any symptom | 100% | 5.7% | 13.7% | 100% | 0 | 968 |