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Table 2 Comparison of sensitivity, specificity, etc. between sputum and BALF for the diagnosis of pulmonary TB in sputum-smear-negative suspects

From: Indicators for prediction of Mycobacterium tuberculosis positivity detected with bronchoalveolar lavage fluid

  Positive detectable rate (%) Sensitivity (%) Specificity (%) Accuracy (%)
Sputum-culture/NAAT 32.4 43.5 100.0 58.0
 sputum-culture 26.1 35.1 100.0 51.7
 sputum-NAAT 20.7 27.7 100.0 46.2
BALF-smear/culture/NAAT 47.2 63.4 100.0 72.8
 BALF-smear 9.2 12.0 99.2 34.3
 BALF-culture 42.5 57.1 100.0 68.0
 BALF-NAAT 33.2 44.5 99.7 58.6
Sputum+BALF 50.9 68.4 100.0 72.8
  1. TB tuberculosis, BALF bronchoalveolar lavage fluid, NAAT nucleic acid amplification test