The significant predicting biomarkers for DCM versus DM-N were TNF-α ≥1.7, AGEs ≥11.4 and IL-6 ≥3.5 with AOR 5.9 (1.6–24.7), 9.1 (1.4–50.5) and 7.0 (1.5–31.9), respectively; p < 0.05. Here, IL6 is linked to diabetes mellitus.