The study by Alewyn Ott et al. examines the prevalence of dementia and its subtypes in the general population of Ommoord, a suburb of Rotterdam, and investigates the association between dementia prevalence and education level. The study included 7528 participants aged 55-106 years. The overall prevalence of dementia was 6.3%, with Alzheimer's disease being the primary subdiagnosis (72%) and vascular dementia (16%) and Parkinson's disease dementia (6%) decreasing with age. The prevalence of dementia was significantly higher in individuals with lower levels of education, and this association was not explained by cardiovascular disease. The study concludes that the prevalence of dementia increases exponentially with age, and about one-third of those aged 85 and over have dementia. Alzheimer's disease accounts for three-quarters of all dementia cases, and there is an inverse dose-response relationship between education and dementia, particularly Alzheimer's disease.The study by Alewyn Ott et al. examines the prevalence of dementia and its subtypes in the general population of Ommoord, a suburb of Rotterdam, and investigates the association between dementia prevalence and education level. The study included 7528 participants aged 55-106 years. The overall prevalence of dementia was 6.3%, with Alzheimer's disease being the primary subdiagnosis (72%) and vascular dementia (16%) and Parkinson's disease dementia (6%) decreasing with age. The prevalence of dementia was significantly higher in individuals with lower levels of education, and this association was not explained by cardiovascular disease. The study concludes that the prevalence of dementia increases exponentially with age, and about one-third of those aged 85 and over have dementia. Alzheimer's disease accounts for three-quarters of all dementia cases, and there is an inverse dose-response relationship between education and dementia, particularly Alzheimer's disease.