Objective To investigate the prevalence and risk factors of mild cognitive impairment (MCI) among the old people in Chongqing, China. Methods From October to November, 2015, 1850 persons more than 60-year-old in Chongqing were cluster sampled. They were investigated with self-made general situation questionnaire, Mini-Mental State Examination (MMSE), Instrumental Activity of Daily Living Scale (IADL) and Geriatric Depression Scale (GDS) through face-to-face interview. Enumeration data were tested withχ2 test and multiple Logistic regression. Results MCI prevalence was 11.73%in the old people in Chongqing, and various with the residential re-gions, ages, marital status, literacy, career, smoking, drinking, seafood-eating, egg-eating, exercising, intensive labor, low intensity of labor, housework, outdoor activities, Mahjong/chess/cards playing, TV-watching/radio-listening/newspaper-reading, social activities, obesity, hy-pertension, diabetes, stroke, hyperglycemia, cerebrovascular insufficiency and depression (χ2>4.092, P<0.05). According to multiple Logis-tic regression, living in rural areas, aging, celibacy, obesity, hypertension and depression were the risk factors of MCI;while middle school and above years of schooling, mental workers, smoking cessation, frequent seafood-eating and egg-eating, exercising, daily intensive labor and low intensity of labor, daily and sometimes housework, daily and weekly outdoor activities at least once, daily Mahjong/chess/cards playing and daily TV-watching/radio-listening/newspaper-reading were the preventing factors. Conclusion The morbidity of MCI is high in the old people in Chongqing. It is necessary to take effective intervention in view of the related factors of MCI as early as possible, to delay or prevent the development of MCI to dementia.

Objective To investigate the prevalence status and risk factors of mild cognitive impairment (MCI) in old people in pension facilities in Chongqing, China. Methods From October to November, 2015, the people above 60 years old in four pension facilities in Chongqing were cluster sampled. They were interviewed with Mini-Mental State Examination, Instrumental Activity of Daily Living Scale, self-made general situation questionnaire for the elderly and the Geriatric Depression Scale. Results There were 25 MCI patients identified in 84 old people selected, with the prevalence of 29.76%. MCI prevalence was different with the factors such as genders, educational levels, economical status, smoking, eating freshwater fish frequently, participating in outdoor activities frequently, playing Mahjong/chess/cards fre-quently, watching TV/listening to broadcast/reading newspaper frequently, participating in social activities frequently, having religious be-liefs, suffering high blood pressure (χ2>4.271, P<0.05). Based on multivariate Logistic regression analysis, male was the protective factor (OR=0.055, 95%CI:0.005~0.618), while high blood pressure was the risk factor (OR=8.281, 95%CI:1.278~53.646) to the MCI. Conclu-sion MCI is prevalent in old people in pension facilities in Chongqing, which needs intervention targeted to the risk foctors.

Objective To investigate the prevalence of dementia in the elderly people in pension agencies in Chongqing,and analyse its influencing factors.Methods The elderly people aged 60 and above in ten pension agencies were chosen randomly as subjects based on cluster sampling method.Face to face interviews were adopted in this research.The cognitive status of the elderly people was assessed through mini-mental state examination (MMSE) and instrumental activities of daily living scale (IADL).The influencing factors of dementia in the elderly people in pension agencies were collected by self-made general status scale for elderly people and the geriatric depression scale (GDS).Results A total of 119 elderly people were diagnosed with dementia in 415 eligible elderly people,and the prevalence rate was 28.67 ％.The prevalence rate of dementia in the elderly people was significantly different by age,gender,marital status,educational level,habitation,whether or not smoking,drinking and exercise,frequencies of housework and outdoor activities,whether or not having religious beliefs,and whether or not suffering from high blood pressure,diabetes,coronary heart disease,stroke and depression (P＜0.05).No statistically significant difference was found in the prevalence rate of dementia in the elderly people differed by occupation,financial situation,whether or not eating fresh water fishes,seafood,fish oil health products,livers or fat meat,eggs,and frequencies of social interaction with relatives and neighbors,playing Mahjong or chess,watching TV or listening to broadcasts and participating in social activities (P＞0.05).The multivariate Logistic regression analysis showed that aged 70 or above,female,smoking,overweight or obesity and hypertension were the risk factors for dementia in the elderly people in pension agencies in Chongqing,while in marriage,not live alone and participating in outdoor activities everyday were the protective factors for dementia in the elderly people in pension agencies in Chongqing.Conclusion The prevalence rate of dementia in the elderly people in 10 pension agencies in Chongqing is relatively high,which indicated that more emphasis should be placed on preventing and controling dementia.