We found a graded increase in correlation coefficients between hs-cTnT and hs-cTnI (Abbott) from normoglycemia (r = 0.38, 95% CI 0.36–0.40; P < 0.001), and prediabetes (r = 0.46, 95% CI 0.42–0.49; P < 0.001), to diabetes (r = 0.56, 95% CI 0.52–0.60; P < 0.001). Here, TNNI3 is linked to prediabetes syndrome.