Prevalence of Mild Cognitive Impairment Subtypes in Patients with Parkinson's Disease - Comparison of two Modes of Classification

Early detection of dementia in Parkinson's disease is becoming increasingly important. The goal of this study was to establish prevalence of mild cognitive impairment subtypes in Parkinson's disease using two different modes of mild cognitive impairment classification. Categorizing patients into mild cognitive impairment subtypes according to the minimum mode of mild cognitive impairment classification revealed the following results: three patients (2.5%) were categorized as cognitively healthy, whereas 117 patients (97.5%) met the criteria for mild cognitive impairment. When categorizing patients according to the mean mode of mild cognitive impairment classification, 41.7% of the patients were categorized as cognitively healthy, whereas 58.3% met the criteria for mild cognitive impairment. Frequency of mild cognitive impairment varies substantially, depending on how impairment is defined.