Fig. 1

Age distribution, source of referral and relapse-free survival curves for all study patients. a age distribution at presentation of all patients cared for within the vasculitis service. Data are shown as % frequency within each 10-year period. b source of referral of vasculitis patients up to 2007 (left) and 2009 – 2013 (right). c relapse-free survival curves for patients in the groups defined by their ANCA status at presentation (PR3: proteinase-3, red line, n = 51; MPO: myeloperoxidase, blue line, n = 46; ANCA-: ANCA negative, green line, n = 7). p = 0.02 for PR3 vs. MPO and for PR3 vs. ANCA- by log rank analysis