Table 3.

Diagnostic value of various sampling techniques

Sampling techniques	Yield (%)	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
NP-BAL	75.0	89.4 (74.2-96.5)	43.3 (25.9-62.3)	66.6 (51.9-78.8)	76.4 (49.7-92.1)
B-BAL	80.8	94.7 (80.9-99.0)	36.6 (20.5-56.1)	65.5 (51.3-77.4)	84.6 (53.6-97.2)

CI=Confidence interval, PPV=Positive predictive value, NPV=Negative predictive value, NP-BAL=Nonbronchoscopic protected bronchoalveolar lavage, B-BAL=Bronchoscopic bronchoalveolar lavage