Fig. 3.

ROC analysis for harmonic ratios ML OFF (blue): AUC = 0.73, SPARC-Acc ON (red): AUC = 0.80 and OFF (yellow): AUC = 0.93. The positive class was defined as the PD. Hence the true positives are controls classified as such while the false positives are healthy controls classified as PD. Classification was done through SVM. Black circles mark optimal thresholds