Quality score and description of studies’ population in included studies.

Quality score: result of quality assessed in each study (detailed data were shown in supplementary file); Age: mean age; Male: probability of male; BMI: mean body mass index; DM: prevalence of diabetes mellitus; HT: prevalence of hypertension; II: number of II genotype carries; ID: number of ID genotype carries; DD: number of DD genotype carries.