• Ivan Dimitrov, Christophe Tzourio, Ivan Milanov, Nadezhda Deleva, and Latchezar Traykov.
• Department of Neurology, Sveta Marina University Hospital, Varna, Bulgaria. indimitrov@yahoo.com
• Am J Alzheimers Dis Other Demen. 2012 Mar 1;27(2):131-5.

BackgroundPrevalence of cognitive impairment and dementia has not been studied in Bulgaria up to date. A 2-phase cross-sectional study was designed in order to determine the prevalence of dementia, its subtypes, and mild cognitive impairment in a Bulgarian population.MethodsThe study sample consisted of 605 participants over the age of 65, residents of the city of Varna. A total of 540 participants (89%) completed the screening phase of the study. All positive screens and a control group were included in the diagnostic phase of the study, where comprehensive neuropsychological, clinical, and imaging assessments were performed.ResultsDementia was diagnosed in 39 persons (7.2%) and 36 had mild cognitive impairment (6.7%). Alzheimer's disease was the most frequent type of dementia (3.1%), followed by vascular dementia (2.0%).DiscussionOur results support the hypothesis that prevalence of vascular cognitive impairment may be higher in Bulgaria than in most European countries.

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