نبذة مختصرة : we have recently used the 39-item Parkinson’s Disease Questionnaire (PDQ-39) and its eight dimensions and the 15-item GDS (GDS-15) to assess quality of life and depressive symptoms in PD patients, respectively. We divided the patients into two groups (PD without depression and PD with depression) according to the GDS-15 cutoff score of eight proposed for the screening of depression in PD.
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