SDC1 and acute kidney injury: In univariable logistic regression, neither preoperative nor post-CPB syndecan-1 concentration was associated with the incidence of AKI (preoperative; OR, 1.002; 95% confidence interval (CI), 0.999–1.004; p = 0.290, post-CPB; OR, 1.000; 95% CI, 0.557–1.392; p = 0.587).