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Table 3 The performance of BALF based detection for the diagnosis of pulmonary TB in sputum-negative suspects and those without sputum

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

  Positive detectable rate % Sensitivity % Specificity % Accuracy %
Sputum-negative
 BALF-smear/culture/NAAT 19.7 35.6 100.0 64.4
 BALF-culture 16.5 29.7 100.0 61.1
 BALF-NAAT 11.1 20.1 100.0 55.8
No sputum
 BALF-smear/culture/NAAT 40.0 53.6 100.0 65.4
 BALF-culture 38.2 51.3 100.0 63.7
 BALF-NAAT 24.5 32.9 100.0 50.0
sputum negative and no sputum
 BALF-smear/culture/NAAT 27.8 44.1 100.0 64.9
 BALF-culture 26.3 41.6 100.0 63.3
 BALF-NAAT 16.5 26.3 100.0 53.7
  1. TB tuberculosis, BALF bronchoalveolar lavage fluid, NAAT nucleic acid amplification test