TFRC and cardiomyopathy: In the analysis of iron metabolites and cardiomyopathy (Table 1), there were 2 SNPs in SI, 69 SNPs in SF, 3 SNPs in STF, 2 SNPs in TFRC, and 24 SNPs in TSP; and SF was a risk factor for cardiomyopathy (OR = 1.750, 95%CI: 1.152~2.657, P = 0.009).