Fig. 1

Disease status and quality of life scores for patients in the APD and non-APD subgroups. Disease status and quality of life scores for patients in the APD and non-APD subgroups as per a UPDRS parts II and III; b UPDRS part IV (dyskinesia duration, dyskinesia disability, and average duration of “off” time); and c the NMSS and PDQ-8. APD, advanced Parkinson’s disease; NMSS, Non-Motor Symptoms Scale for Parkinson’s Disease; PDQ-8, Parkinson’s Disease Questionnaire; Q, question; UPDRS, Unified Parkinson’s Disease Rating Scale