Factors affecting the quality of life of patients with idiopathic Parkinson's disease-a cross-sectional study in an outpatient clinic attendees

The most important predictive factor was MADRS score, followed by clinical fluctuations as measured by UPDRS part IVB and the H-Y stage of disease, which account for 79% of the variance of QoL scores. Therefore, recognition of depression should become an important part of treatment of PD.