CHI3L1 and type 2 diabetes mellitus: Table 1 and Table 2 represent the detailed information of each study included in the meta-analysis for the two biomarkers uKIM-1 and YKL-40, respectively. Supplementary Tables S1 and S2 show the descriptive statistical results of the controls and T2DM patients with normo-, micro-, and macroalbuminuria in studies involving uKIM-1 and YKL-40, respectively.