Fig. 1.

Flow chart of study population. MCI stands for mild cognitive impairment; dementia stands for all subtypes of dementia (Alzheimer's disease, vascular or mixed dementia, Lewy corps dementia, fronto-temporal dementia, Parkinson dementia). The asterisk indicates that the diagnosis of dementia at 7 years was established after a standardized home-based assessment with cognitive performances evaluated by the Mini-Mental State Examination, Grober and Buschke test, and instrumental activities of daily living tests. The dollar sign indicates that the baseline cognitive impairment was assessed using the Short Portable Mental Status Questionnaire with a score of 8 or above as the validated cutoff value for normal cognitive functioning