Fig. 2
Relationship between serum electrolyte levels at the beginning of haemodialysis and those during haemodialysis. Each thick straight line represents regression line, and each band represents 95% confidence interval of the regression line. a Correlation of predialysis serum Ca2+ level and the degree of Ca2+ change after 180 min of dialysis against 3.0 mEq/L of dialysate Ca2+. Regression equation; y = 0.65–0.51x, r = 0.86, p < 0.0001, n = 52. b Correlation of predialysis serum Mg2+ level and the degree of Mg2+ change after 180 min of dialysis against 1.0 mEq/L of dialysate Mg2+. Regression equation; y = 1.09–0.56x, r = 0.88, p < 0.0001, n = 52. c Correlation of predialysis serum K+ level and the degree of K+ change after 180 min of dialysis against 2.0 mEq/L of dialysate K+. Regression equation; y = 1.54–0.58x, R = 0.85, p < 0.0001, n = 52, dialysate K+ = 2.0 mEq/L