HLA-G and chronic kidney disease: However, group I showed an increase in markers for detection of CKD, such as urinary β2-microglobulin levels (group I: C = 116:26 μg/L), albumin levels (group I: C=0.14:0.07 mg/gCr) (both p < 0.01) and serum creatinine levels (group I: C= 0.18:0.12 mg/dL, p < 0.05).