A case-control study with the objective of evaluating a number of risk factors for dementia in the elderly in two suburban commune, Soc Son district and the city's second ward, Dong Da district, Hanoi city was conducted on 225 elderly people. Results and Conclusions: Identifying factors hierarchical transformation is indeed risk factors for dementia are: Increased total blood cholesterol: 49.3 percent
diabetes: 41,4 percent.