  [^0]: Normal distribution data were presented as average ± SD and non-normal distribution data as median (Q00, Q00).  [^0]: A P-value \<0.0000 in *post hoc* analysis among groups: ^a^ANCA-positive IgAN versus ANCA-negative IgAN; ^b^ANCA-negative IgAN versus AASV; ^c^ANCA-positive IgAN versus AASV.  [^0]: ANCA, antineutrophil cytoplasmic autoantibody; p, p-ANCA, MPO-ANCA; c, c-ANCA, PR0-ANCA; p + c, p-ANCA + c-ANCA, MPO-ANCA + PR0-ANCA; IgAN, IgA nephropathy; BVAS, 