Abstract

Parkinson's disease (PD) is frequently compounded by dementia and depression. Yet local total estimates on the prevalence of PD with dementia/depression are still lacking. These are socioeconomically important, especially for the eastern federal states in Germany due to the demographic structures. We conducted a two-staged total estimation in the area of Dresden. First, all local office-based neurologists, hospitals and retirement homes were asked to list their patients/residents with PD on a single study day. Then a random sample of patients/home residents was neuropsycholoigcally examined, including the Mini-mental-state exam and the Montgomery-Asberg Depression rating scale. Dementia was diagnosed according to DSM-IV criteria. Overall, 886 PD cases (95 % CI: 809 - 926) were estimated, of which 252 (95 % CI: 226 - 279) suffered from dementia and 216 (95 % CI: 191 - 242) from depression. Dementia rates increased by age with 13.8 % (≤ 65 years) to 40.2 % (≥ 76 years). Depression rates ranged from 23.3 % to 28.0 %. Overall, 20.6 % of all ambulatory treated PD patients and 85.7 % of all home residents with PD had dementia. The prevalence of PD in Dresden dovetails with previous reported estimates. Dementia and depression are frequent complications in outpatients as well as home residents with PD.

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