Table 1.

Characteristics of patients whose cells were used in flow cytometry analysis to establish regulatory T-cell frequencies

	Characteristics of patients (PG1) whose cells were used for CD25 and Foxp3 expression (n= 55)	Characteristics of patients (PG2) whose cells were used for serial Foxp3 expression (n= 21)
Median age	59·5 years (22–82)	63 years (25–81)
Median creatinine	113 μmol/l (65–947)	211 μmol/l (78–657)
Active disease	17	21
Remission	38	0
ANCA+ at sampling	35	17
ANCA− at sampling	20	4
Sampled at new presentation of disease	10	17
Median time since diagnosis of disease to sampling	142 weeks (0–1158)	43 weeks (24–165) for four relapsed patients 0 weeks for patients with new diagnosis
Median follow-up	335 weeks (20–1200)
Death during follow-up	6	0

ANCA, anti-neutrophil cytoplasm antibody.