GeneXpert analysis of bronchoalveolar lavage (BAL) samples: promising diagnostic modality in patients with smear-negative pulmonary tuberculosis

The Egyptian Journal of Bronchology

Table 3 Utility of GeneXpert and post bronchoscope sputum examination

Test	Sensitivity	Specificity	PPV	NPV	ACC
BAL GeneXpert	81.25	95.42	65	97.98	94.08
Post bronchoscope direct smear	12.5	100	100	91.61	91.71
Post bronchoscope culture	43.75	98.69	77.77	94.37	93.49
Post bronchoscope GeneXpert	50	97.38	66.66	94.9	92.89

BAL bronchoalveolar lavage, N number, PPV positive predictive value, NPV negative predictive value, ACC accuracy