Objective To investigate the prevalence of frailty in diabetic patients and determine the predictive validity of frailty assessment instrument in poor outcome.Methods The cohort studies about poor outcomes of frailty in diabetic patients were searched during January 2001 and April 2019 in the following electronic bibliographic databases,PubMed,Embase,Web of Science,PEDro,and the Cochrane Library,CINAHL,CNKI,Wanfang,CBM and VIP Data.The data were extracted according to inclusion and exclusion criteria.Meta-analysis was conducted by STATA 15.1 software,and descriptive analysis was conducted for ...