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Receiver operating characteristic (ROC) curve for discriminating APD patients from (A) IPD AR and (B) IPD TD patients using clinical rating scores (MDS-UPDRS-3, PIGD) and spatiotemporal gait variability parameters CV, Coefficient of Variance; APD, Atypical Parkinsonian Disorders; AR, akinetic-rigid; TD, tremor-dominant; PIGD, Postural Instability and Gait Difficulty Score; AUC, Area under the curve.
