Analysis of risk factors of contrast-induced nephropathy
There were ten variables significantly correlated with CIN in univariate analyses. Subsequently, forward stepwise selection in multivariate log-binomial regression modeling showed that the following four variables were independent risk factors for CIN: HCT, PLT, IABP durations, dosage of contrast agent. (Table 3 ). On multivariate analysis, HCT (HR, 0.913; 95% CI, 0.848-0.984; P = 0.017), PLT (HR, 0.988; 95% CI, 0.980-0.995; P = 0.002), IABP use >4 days (HR, 0.535; 95% CI, 0.356-0.712; P = 0.012), dosage of contrast agent (HR, 1.812; 95% CI, 1.167-3.763; P <0.001) were each independently associated with CIN.