Table 3 Summary of data for microscopy and LJ culture.
From: Diagnosis of tuberculosis: the experience at a specialized diagnostic laboratory
Culture and Smear Microscopy | |||
|---|---|---|---|
| Â | Culture +ve | Culture -ve | Total |
Smear +ve | 148(32.0) | 80(17.2) | 228(49.2) |
Smear -ve | 44(9.5) | 191(41.2) | 235(50.7) |
Total | 192(41.5) | 271(58.5) | 463(100) |
Analysis of data | |||
| Â | Value | 95% Confidence Interval | |
Sensitivity | 0.77 | 0.70 to 0.83 | |
Specificity | 0.70 | 0.65 to 0.76 | |
PPV | 0.65 | 0.58 to 0.71 | |
NPV | 0.81 | 0.76 to 0.86 | |
Likelihood Ratio | 2.61 | Â | Â |