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Yield of diagnostic procedures in LLF TB
| Technique used for diagnosis | Number of patients (n = 300) | Percentage (%) |
|---|---|---|
| Sputum microscopy for AFB | 57 | 20.66 |
| Induced sputum microscopy for AFB | 80 | 28.00 |
| Bronchial wash for microscopy | 98 | 32.66 |
| Bronchial wash for Gene Xpert MTB/Rif (performed in 170 cases) | 155 | 91.17 |
LLF TB: lower lung field tuberculosis. Chi-square goodness of fit: χ2=53.87, df = 3, P < 0.00001.
