Soluble RAGE was correlated with eGFR in both diabetic and non-diabetic CKD patients.
The correlation remained unaffected by enzymatic antioxidants in diabetic CKD.
The correlation was confounded by enzymatic antioxidants in non-diabetic CKD.
Soluble RAGE is a better indicator of eGFR in diabetic CKD patients.
Soluble RAGE is unlikely to be an ideal biomarker of non-diabetic CKD.