SDC1 and diabetes mellitus: When variables with P < 0.1 in univariable regression analysis were tested in a multivariable model, high syndecan-1 levels and diabetes mellitus (DM) were found to be independently associated with the presence of CMD (high syndecan-1 level: odds ratio (OR) = 2.769, 95% confidence interval (95% CI): 1.817–4.22, P < 0.01; DM: OR = 1.79, 95% CI: 1.167–2.744, P = 0.01) and IMVC (high syndecan-1 level: OR = 1.908, 95% CI: 1.261–2.888, P < 0.01; DM: OR = 1.466, 95% CI: 1.018–2.112, P = 0.04).