Receiver operating characteristic (ROC) curves provide no evidence that measurements of serum α-synuclein or anti-α-synuclein antibody concentrations can discriminate between individuals with typical Parkinson’s disease and normal control subjects.

<p>Curves for α-synuclein and anti-α-synuclein antibody concentrations are shown in Figs. 4a (top) and 4b (bottom). The areas under the curve (AUC) for the two curves were 0.64 and 0.49, respectively.