Fig. 1From: Positive association of residual kidney function with hemoglobin level in patients on peritoneal dialysis independent of endogenous erythropoietin concentrationHb 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 tertileBack to article page