EGFR and neoplasm: The AUC for detecting tumor EGFR mutations using the plasma samples was 0.686 (95% CI: 0.592–0.780), whereas that using the BWF samples was 0.895 (95% CI: 0.822–0.969), showing a significant difference between the types of specimens (p < 0.0001; DeLong’s test for two correlated ROC curves).