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Table 2 Data set: assessment at presurgical/postsurgical baseline, visits 1–3

From: Combined subthalamic and nucleus basalis of Meynert deep brain stimulation for Parkinson’s disease with dementia (DEMPARK-DBS): protocol of a randomized, sham-controlled trial

Motor assessments • Movement Disorder Society-Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) III (medication-off/−on state)
• Clinical Dyskinesia Rating Scale (CDRS)
Global cognitive function • Alzheimer’s Disease Assessment Scale, cognitive subscale (ADAS-cog)
Activities of daily living • Alzheimer’s Disease Cooperative Study, Activities of Daily Living (ADCS-ADL)
Neuropsychiatric symptoms • Beck Depression Inventory (BDI) II,
• Starkstein Apathy Scale
• Neuropsychiatric inventory (NPI)
Domain specific (frontal executive) tests • Delis-Kaplan Executive Function Systems (D-KEFS) verbal fluency battery
• Wisconsin Card Sorting Test (modified version)
• Trail Making Task (TMT) Part A + B
• Stroop Test (Victoria Version)
• Symbol Digit Modalities Test (SDMT)
Domain specific (attention) test • Brief Test of Attention (BTA)
Quality of life • Parkinson’s Disease Questionnaire (PDQ39)
• EuroQol (EQ)-5d
Health economics • EQ-5d/quality-adjusted life years (QALYs)
Caregiver burden/quality of life • Zarit Burden Interview (ZBI)
• Short form (SF)-36
Clinical global impression of change • Baseline interview: Visit 1
• Follow-up: Visits 2 & 3