Aims: Coronary heart disease (CHD) patients with changed serum soluble receptor for advanced glycation end-products (sRAGE) will experience microalbuminuria and even kidney dysfunction. However, the role of sRAGE for microalbuminuria in CHD is still not established. This study aimed to evaluate the association between sRAGE and early kidney dysfunction in CHD patients. Materials and methods: In this cross-sectional study, sRAGE and urinary albumin to creatinine ratio (uACR) were measured in hospitalized CHD patients who have undergone coronary arteriography to evaluate the distinction and correlation between sRAGE and uACR. Results: There were 127 CHD patients (mean age: 63.06 +/- 10.93 years, 93 males) in the study, whose sRAGE were 1.83 +/- 0.64 mu g/L. The sRAGE level was higher in kidney injury group (uACR >= 30 mg/g) compared with no kidney injury group (uACR < 30 mg/g) [2.08 +/- 0.70 vs. 1.75 +/- 0.61 <mu>g/L, P < .05]. Moreover, the positive correlation between serum sRAGE and uACR was significant in CHD patients (r = 0.196, P < .05). Binary logistic regression suggests sRAGE as a predictor for microalbuminuria in CHD patients [odd ratio = 2.62 (1.12-6.15), P < .05]. The area under the receiver operating characteristic curve (AUC) of sRAGE is higher than that of the traditional indicators of renal function such as creatinine and estimated glomerular filtration rate, indicating sRAGE might have a good performance in evaluating early kidney injury in CHD patients [AUC is 0.660 (0.543-0.778), P < .01]. Conclusions: Serum sRAGE was positively correlated to uACR and might serve as a potential marker to predict early kidney injury in CHD patients. (c) 2024 Elsevier Espana, S.L.U. and Sociedad Espanola de Medicina Interna (SEMI). All rights are reserved, including those for text and data mining, AI training, and similar technologies.