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Combined sensitivity of IGRA and TST with a single sputum smear for AFB in culture-positive pulmonary TB
| Test and result | No. of patients with smear result that was:
|
Total | |
|---|---|---|---|
| Negative | Positive | ||
| IGRAa | |||
| Negative | 16 | 13 | 29 |
| Positive | 60 | 28 | 88 |
| Total | 76 | 41 | 117 |
| TSTb | |||
| Negative | 9 | 4 | 13 |
| Positive | 78 | 39 | 117 |
| Total | 87 | 43 | 130 |
Combined sensitivity of the IGRA and smear, 101/117 (86%).
Combined sensitivity of the TST and smear, 121/130 (93%).
