data extract TTAG-0004.xlsx:This file contains the extracted data for a meta-analysis comparing the performance of point-of-care (POC) HbA1c devices with high-performance liquid chromatography (HPLC) methods. The data includes measurements of mean differences, standard deviations, and other relevant metrics for each included study, grouped by device model and analytical principle. stata code.doc:This Stata script provides the statistical analysis for the meta-analysis comparing POC HbA1c devices with HPLC methods. The script includes data cleaning, random-effects modeling, subgroup analyses, heterogeneity assessment, and publication bias evaluation using Egger’s test and trim-and-fill method.