Fig. 1

Hb level according to the tertiles of mean rCUC. Least square means of Hb level according to the tertiles of mean rCUC in the univariable model (a) and the multivariable-adjusted regression model (b). A linear regression model was used to compare the least square mean among the tertile groups. *P < 0.01 vs. T1. Abbreviations: Hb hemoglobin, rCUC renal creatinine and urea clearance, T tertile