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Correlation matrix visualizing the strength of correlation between baseline parameters and DBS outcomes (metric: difference between pre‐DBS and post‐DBS). BDI, beck depression inventory; HY, Hoehn and Yahr stage; LEDD, levodopa equivalent daily dosage; MoCA, montreal cognitive assessment; PD, Parkinson's disease; PDQ‐39, 39‐item Parkinson's disease questionnaire; SE, Schwab and England quality of life scale; UPDRS, unified Parkinson's disease rating scale.
