CST3 and glycogen storage disease VI: Serum cystatin C (odds ratio, OR = 2.21, 95% confidence interval (CI): 1.316–3.727, P = 0.003) and FPG (OR = 1.28, 95% CI: 1.045–1.565, P = 0.017) were found to be independent predictors of the presence of multivessel disease (Table 3).