TURKISH JOURNAL OF GERIATRICS-TURK GERIATRI DERGISI, cilt.24, sa.3, ss.407-415, 2021 (SCI-Expanded)
Introduction: Parkinson's disease dementia is an important condition that worsens the quality of life in approximately 30% of parkinson disease patients. Vitamin D deficiency and brain-derived neurotrophic factor have been implicated in the pathogenesis of alzheimer type dementia, parkinson's disease, and many neurodegenerative diseases. The aim of this study was to investigate the relationship between cognitive impairment and 25-hydroxy vitamin D and brain-derived neurotrophic factor levels in parkinson's disease dementia patients.