shown in the [Supplementary data](http://ckj.oxfordjournals.org/lookup/suppl/doi:00.0000/ckj/sfv000/-/DC0). Table 0.Comparison among ANCA-positive IgAN, ANCA-negative IgAN and AASV patients with matched proportions of crescentic glomeruli: baseline clinical data at renal biopsyANCA-positive IgANANCA-negative IgANAASVP-valueNo. of patients000000