area under curve partial area under the receiver operator characteristic curve An area under the curve where the curve is the true positive rate and the range of interest is a specified portion of the range of possible values for the false positive rate and/or range of possible values for the true positive rate. Area under the ROC curve is defined as an area under the curve where the curve is the true positive rate and the range of interest is the false positive rate. ROC stands for Receiver Operating Characteristic. The area under the ROC curve is used to assess the performance of a classifier used to distinguish between two or more groups. Another term for true positive rate is sensitivity and another term for false positive rate is 1-specificity. Kenneth Wilkins, Brian S. Alper, Muhammad Afzal, Harold Lehmann and SEVCO group Philippe Rocca-Serra SEVCO group ready for release