Table 1.

Serum complement C3 and C4 levels and C3 breakdown product C3d over time

	Start of hematuria		1 month after hematuria		4 months after hematuriaa		7 months after hematuriab
	C3 (mg/L)	C4 (mg/L)	C3 (mg/L)	C4 (mg/L)	C3 (mg/L)	C4 (mg/L)	C3 (mg/L)	C4 (mg/L)	C3d (%)
Twin Ac	619	220	515	186	441	118	556	170	1.22
Twin Bc							632	197	1.47
Motherc							490	141	0.54
Father							1,200	232	1.23
Normal values							700–1,500	100–400	<3.30

^aThree months after discharge from hospital

^bSix months after discharge from hospital

^cThe C3 mutation was present in the marked individuals