ObjectivesTo systematically review the current status of cognitive impairment of the elderly in China.MethodsCNKI, VIP, CBM, WanFang Data, PubMed, EMbase and The Cochrane Library databases were electronically searched to collect studies on the current status of cognitive impairment of the elderly in China from January 1st, 2000 to March 12th, 2020. Two reviewers independently screened literature, extracted data and assessed risk of bias of included studies. Then, meta-analysis was performed by using Stata 14.1 software.ResultsA total of 126 studies involving 187 115 elderly were included. The results of meta-analysis showed that the cognitive impairment rate of the elderly in China was 22.0% (95%CI 20.4% to 23.6%). Subgroup analysis showed that the cognitive impairment rate was higher in females, seniors, low education level, residing in rural area, engaging in manual labor, no spouse, living alone, monthly income less than 1 000 yuan, and suffering from chronic diseases.ConclusionsCurrent evidence shows that the cognitive impairment rate of the elderly in China is 22%, which is relatively high in females, seniors, low education level, residing in rural area, engaging in manual labor, no spouse, living alone, low-income, and suffering from chronic diseases.
ObjectiveTo systematically review the current status of tooth loss among elderly individuals in China.MethodsDatabases including CNKI, VIP, CBM, WanFang Data, PubMed, EMbase, and The Cochrane Library were searched to identify studies on the current status of tooth loss in the Chinese elderly from inception to December 31st, 2020. Two reviewers independently screened literature, extracted data, and assessed risk of bias of the included studies. Meta-analysis was then performed using Stata 16.0 software.ResultsA total of 26 studies with a sample size of 17 523 participants were included. The results of the meta-analysis showed that the prevalence rate of tooth loss among the Chinese elderly was 84.7% (95%CI 81.8% to 87.6%). Subgroup analysis showed that the tooth loss prevalence rates were higher in females, individuals aged over 75, and those living in rural areas or southwest China.ConclusionsThe current evidence shows that the prevalence rate of tooth loss among the Chinese elderly is high. Due to the quantity and quality of the included studies, the above conclusions are needed to be verified by more high-quality studies.
ObjectiveTo systematically review studies investigating the rate of falls among Chinese elderly. MethodsThe CNKI, VIP, CBM, WanFang Data, EMbase, The Cochrane Library and PubMed databases were electronically searched to identify cross-sectional studies on the rate of falls in Chinese elderly published from January 1st, 2000 to December 31st, 2021. Two reviewers independently screened the literature, extracted data, and assessed the risk of bias of the included studies. Meta-analysis was then performed using Stata 16.0 software. Results A total of 54 cross-sectional studies, involving 111 098 cases were included. The results of meta-analysis showed that the rate of falls among Chinese elderly was 19.3% (95%CI 16.9% to 21.6%). Subgroup analyses showed that the fall rates were 16.1% and 21.9% for males and females, respectively. The rates for 60-69, 70-79, and >80 years age groups were 16.3%, 21.7%, and 27.3%, respectively. The rates for the North, South, East, Southwest, and Central parts of China were 16.6%, 17.9%, 18.7%, 22.0%, and 25.8%, respectively. For the urban and rural elderly, the rates were 16.4% and 23.1%, respectively. The rates for those with or without spouses were 24.2% and 26.8%, respectively, while for the solitary and non-solitary elderly were 21.1% and 17.8%, respectively. The rates for elderly with or without exercise habits were 22.1% and 27.1%, respectively. ConclusionThe rate of falls is high among Chinese elderly, especially among females, older individuals, those in Southwest China, rural individuals, those without spouse, solitary individuals and those without exercise habits.