Table 1. Treatment Regimens for ANCA-associated Vasculitis, IgG Levels, and Number of Infections Prior to Commencement of SCIG.

ANCA: antineutrophil cytoplasmic antibody; AZA: azathioprine; CYC: cyclophosphamide; Ig: immunoglobulin; PLEX: plasmapheresis; RTX: rituximab; S: steroids; SCIG: subcutaneous immunoglobulin

Patient ID	Induction	Maintenance	RTX details	Duration of RTX cessation prior to SCIG (months)	Ig levels prior to SCIG (mg/dL) (Normal range 700 - 1,600 mg/dL)	Number of infections
1	S + CYC + PLEX + RTX	AZA	Induction 375 mg/m2 q week x 4	95	299	5
2	S + RTX	RTX	Seven courses of induction 375 mg/m2 q week x 4 for initial disease and six relapses.  Maintenance q six months	Ongoing RTX use	484	2
3	S + CYC	RTX	Induction 375 mg/m2 q week x 4; one dose of 500 mg for recurrence	10	318	2
4	S + CYC	RTX	Maintenance 1,000 mg q six months	Ongoing RTX use	392	5