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Table 4 Kidney biopsy results depending on proteinuria in children with IgAVN

From: IgA vasculitis nephritis clinical course and kidney biopsy – national study in children

  Nephrotic proteinuria
Gr.A N = 55
Non-nephrotic proteinuria
Gr.B N = 38
Isolated hematuria
Gr C N = 13
Time to kidney biopsy from the onset (days) 30 (6–111.7) 38 (8–758) 104 (21–358)
MEST-C score
 0 1 (1%) 0 (0%) 1 (1%)
 1 15 (14%) 17 (16%) 8 (8%)
 2 25 (24%) 9 (8%) 3 (3%)
 3 7 (7%) 10 (9%) 1 (1%)
 4 4 (4%) 2 (2%) 0 (0%)
 5 3 (3%) 0 (0%) 0 (0%)
  > 5 0 0 0
Oxford classification
 M1 52 (49%) 36 (34%) 12 (11%)
 E1 17 (16%) 5 (5%) 0 (0%)
 S1 19 (18%) 9 (8%) 3 (3%)
 T1 17 (16%) 7 (7%) 2 (2%)
 T2 1 (1%) 0 (0%) 0 (0%)
 C1 14 (13%) 15 (14%) 0 (0%)
 C2 5 (1%) 1 (2.6%) 0 (0%)