Receiver operating characteristic (ROC) curve for arm swing asymmetry. The ROC curve it is a plot of the true positive rate against the false positive rate for the different possible cut points of a diagnostic test. In this case we present the plot for Arm Swing Asymmetry (ASA). The overall result of the Area Under the Curve (AUC) of 0.78 means that ASA is capable to adequately differentiate patients from controls in the 78% of cases which means that the accuracy of the diagnostic test is fair.