GFS was positively associated with serum creatinine (r = 0.603, p<0.001), presence of CKD (r = 0.396, p = 0.006), and blood glucose (r = 0.333, p = 0.038), and negatively associated with eGFR (r = −0.612, p<0.001), and MMP-9 expression in ATc (r = −0.324, p = 0.03) and NTc (r = −0.642, p<0.001). This evidence concerns the gene MMP9 and chronic kidney disease.