Objective: To systematically evaluate the prevalence of cognitive frailty in the elderly patients of China. Methods: CNKI, Wanfang data, CBM, VIP, Web of Science, The Cochrane Library, EMBASE and Pubmed databases searched to collect cross-sectional studies related to cognitive frailty in the elderly of China, researching time was set from the establishment of the database to March 2022. Related literatures were screened and extracted independently by two reviewers, the risk of bias of included studies were also assessed. Meta-analysis was then performed using Stata 15.0 software. Results: A total of 17 cross-sectional studies involving 8 581 elderly individuals were included. The results of meta-analysis showed that the prevalence of cognitive frailty in the elderly of China was 18 %[95 %CI(15 %,22 %)]. The results of subgroup analysis showed that the incidence of cognitive frailty in the elderly of China was different in different research places. The incidences of cognitive frailty of the elderly in hospitals, communities and nursing institution for the aged were 22 % [95 %CI (17 %) 26 %], 9 % [95 %CI (7 % 12 %)], 24 % [95 %CI (17 %, 30 %)] respectively. In addition, the incidence of cognitive frailty was higher in female, advanced age, people lacking physical exercise, people with low education, people with depression or malnutrition. Conclusions: The incidence of cognitive frailty in the elderly of China is high, which is affected by the source population , age, sex, education level, frequency of physical exercise, depression and nutritional status.
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