Cognitive impairment rate of the elderly in China: a meta-analysis
Objectives To systematically review the current status of cognitive impairment of the elderly in China.
Methods CNKI, 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.
Results A 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, those with low education level, those residing in rural areas, those engaging in manual labor, those with no spouse and/ or living alone, those with a monthly income less than 1 000 yuan, and those suffering from chronic diseases.