Fig. 2From: The path linking disease severity and cognitive function with quality of life in Parkinson’s disease: the mediating effect of activities of daily living and depressionMultiple mediation model with ADL and depression as chaining mediators (cognitive function as independent variable). MMSE: Mini-Mental State Examination, UPDRS II: Unified Parkinson’s Disease Rating Scale, GDS: Geriatric Depression Scale, PCS: physical component summary, MCS: mental component summary. The solid lines indicate the PCS model and the dotted lines indicate the MCS model. Control variables: age, marital status, and education level. ***p < 0.001; *p < 0.05Back to article page