Table 3.

The effect of intravenous iron on complement levels in dialysis patients and the correlation with soluble C5b-9.

	No iron			Iron			sC5b-9
	Pre-HD	Post-HD	P*	Pre-HD	Post-HD	P%	R	P
C1q (μg/mL)	39.7 ± 9.8	43.2 ± 10.0	0.6	42.06 ± 10.3	40.8 ± 9.3	0.8	−0.13	0.4
MBL(ng/mL)	862 ± 145	1, 087±229	0.1	1, 660±688	1, 518±570	0.8	0.03	0.9
Properdin (μg/mL)	9.1 ± 1.2	9.6 ± 6.3	0.8	11.4 ± 1.4	12.0 ± 1.8	0.6	−0.30	0.4

Values are expressed as mean ± standard error of the mean. P^* indicate P-values for the difference between samples pre and post-HD in the HD session without iron tested by paired t-test. P^% indicate P-values for the difference between samples pre and post-HD in the HD session with iron tested by paired t-test. In the last column, R indicates Pearson correlation coefficient between Post-HD/Pre-HD ratio between the sessions of the complement component compared with the Post-HD/Pre-HD ratio between the sessions of sC5b-9.