随着社会人口老龄化的进展和人类寿命的延长，老年痴呆症的患病率逐渐升高。老年痴呆症严重损害了老年人的健康与生活质量，给患病老人及其家庭带来了很大的困扰，给家庭和社会造成了很大的经济负担，已成为全球性的健康问题。由于我国人口众多，所以我国的老年痴呆症的患病形势更为严峻，急需引起卫生部门足够的重视。但是老年痴呆症的发病机制尚未明确，且现在尚无彻底的治疗方法。希望通过对其危险因素的研究与控制，在很大程度上降低老年痴呆症的发病率。“,”With the aging of population and prolonging of life span ,the prevalence of dementia has been increasing gradually.Senile dementia has seriously damaged the health and quality of life of the elderly ,cau-sing great economic burden to the family and society,and has become a global health problem.Because of China′s large population,the prevalence of senile demential in China is more severe,urgently needing enough attention from the health sector.The pathogenesis of senile dementia is not very clear,and now there is no radical treatment.However the study and control of the risk factors can greatly reduce the risk of developing senile dementia.