Fig. 2From: Tumour content ratio matters for detecting epidermal growth factor receptor mutation by cobas test in small biopsies; a retrospective studyReceiver operating characteristic curve analysis of tumour content ratios to predict EGFR detection by cobas. The area under the curve (AUC) was 0.68 with a cut-off reference value of 9% (sensitivity 0.87, specificity 0.47)Back to article page