Table 2 Comparison of both microscopy methods with the gold standard culture method
From: Comparison of direct versus concentrated smear microscopy in detection of pulmonary tuberculosis
AFB microscopy | Â | Gold standard + | Gold standard - | Total | Sensitivity % (95% CI) | Specificity % (95% CI) |
|---|---|---|---|---|---|---|
Direct | + | 74 | 0 | 74 | 70.5 (60.8 – 79.0) | 100 (99.5 – 100) |
| Â | - | 31 | 810 | 841 | ||
Concentration | + | 87 | 0 | 87 | 82.9 (73.2 – 88.7) | 100 (99.5 – 100) |
| Â | - | 18 | 810 | 828 | ||
Total | Â | 105 | 810 | 915 | Â | Â |