Fig. 4From: Identification of unhealthy alcohol use by self-report and phosphatidylethanol (PEth) blood concentrations in an acute psychiatric departmentReceiver operating characteristics (ROC) curves of phosphatidylethanol (PEth) as a test for: a an AUDIT score of eight and above, b an average daily consumption of four or more alcohol units the last week, and c diagnosed with alcohol disorder. AUC = area under the ROC curve. Asterisks indicate the location of Youden’s index in each curve, with details found in the embedded framesBack to article page