Fig. 3From: Prevalence and profile of nocturnal disturbances in Chinese patients with advanced-stage Parkinson’s disease: a cross-sectional epidemiology studyScatter plot for PDSS-2 total score versus PDQ-39 total score (all analysis set). Includes N = 442 patients. PDSS-2, Parkinson’s Disease Sleep Scale 2nd version; PDQ-39, Parkinson’s Disease Questionnaire-39Back to article page