“…In addition to exploring the entire picture of changes in cognitive function of the elderly in China, this study also explores risk factors for cognitive impairment in the Chinese elderly. Risk factors for cognitive impairment have been extensively documented throughout the world and include: (1) demographics, such as age, gender, education level, marital status, coresidence and income [25,26,27,28,29,30]; (2) psychological factors [31,32]; (3) lifestyle, including diet, smoking, drinking and exercising [33,34,35,36,37,38]; (4) ADL [39,40]; (5) social engagement [41,42]; and (6) cardiovascular risk factors, including hypertension, diabetes, heart disease, stroke or CVD and dyslipidemia [43,44,45]. A few studies have attempted to identify risk factors for cognitive impairment of the Chinese elderly; however, the data were either too outdated or cross-sectional to precisely grasp the core of the issue from a dynamic perspective [23,46,47].…”