Table 2.

Initial complement antigenic levels: C3, C4, CD46, and factor H (FH), factor I (CFI)

Patienta	C3(0.68–1.38 g/l)	C4 (0.18–0.6 g/l)	CD46	FH (0.35–0.59 g/l)	FI (38–58 mg/l)
2	0.57	0.15	Not tested	0.44	70
4b	0.89	0.3	Normal	0.52	41
5b	0.92	0.2	Not tested	0.29	Not tested
6b	1.08	0.36	Not tested	0.5	74
10	1.06	0.13	Not tested	0.45	68
12b	1.02	0.19	Normal	0.57	62
14	0.65	0.31	Normal	0.43	41
15	0.77	0.29	Normal	0.23	84
16	0.95	0.51	Normal	0.53	42
17	1.06	0.24	Normal	0.53	44
18	1.1	0.18	Normal	0.48	52
19b	1.23	0.52	Normal	0.48	70
20	0.51	0.16	Not tested	0.48	59
21	1.61	0.29	Normal	0.77	73
22b	1.22	0.2	Normal	0.73	78
23	0.91	0.16	Not tested	0.39	65
24	0.61	0.14	Normal	0.51	62

FH, factor H; FI, factor I.

^aIdentification numbers for patients 2, 4, 5, 6, 10, and 12 correspond to those in a previous publication.⁹

^bIndicates patients in whom established renal failure developed.