Table 5.

Calcium balance.

		Acetate (A)	Citrate (C)	Citrate (C+)	P(Avs.C)	P(Avs.C+)
Calcium, serum, ionised (mmol/l)	pre-dialysis	1.19 ± 0.09	1.20 ± 0.07	1.23 ± 0.08	ns	< 0.01
	post-dialysis	1.22 ± 0.10	1.14 ± 0.10	1.31 ± 0.10	< 0.001	< 0.001
Patients with dialysate calcium concentration of 1.25 mmol/l
Calcium, serum, ionised (mmol/l)	pre-dialysis	1.14 ± 0.04	1.16 ± 0.04	1.16 ± 0.06	ns	ns
	post-dialysis	1.09 ± 0.03	0.99 ± 0.02	1.13 ± 0.07	< 0.01	ns
Patients with dialysate calcium concentration of 1.50 mmol/l
Calcium, serum, ionised (mmol/l)	pre-dialysis	1.19 ± 0.10	1.21 ± 0.08	1.24 ± 0.08	ns	< 0.05
	post-dialysis	1.27 ± 0.06	1.19 ± 0.05	1.34 ± 0.05	< 0.001	< 0.001

Serum ionised calcium at the beginning and at the end of the dialysis sessions using acetate dialysate (A) vs. citrate dialysate with (C+) or without (C) calcium supplementation.