Zinc Acetate Hydrate Supplementation versus Polaprezinc Supplementation for Improving Hypozincemia in Hemodialysis Patients: A Randomized Clinical Trial

Figure 6

Scatter plots showing the correlation between serum zinc concentration and serum copper concentration. (a) With regression lines reflecting serum creatinine levels stratified into three ranges. A negative correlation between serum zinc concentration and serum copper concentration is seen in a serum creatinine level of <11.5 mg/dL (r = −0.394,  < 0.001) but not in the level of ≥11.5 mg/dL (r = 0.151,  = 0.104). (b) With regression lines reflecting serum transthyretin levels stratified into three ranges. A negative correlation between serum zinc and serum copper concentrations is seen in a serum transthyretin level of <30 mg/dL (r = −0.419,  < 0.001) but not in the level of ≥30 mg/dL (r = 0.140,  = 0.122).

(a)

(b)