The supplementary material of"Gastrointestinal manifestations in pediatric IgA vasculitis: associations with disease activity and outcomes"

This material contains the supplementary tables and figures:Supplementary Figure 1. The flowchart of patient selection; Supplementary Figure 2. a. The age distribution of IgAV patients; b. The monthly distribution of all IgAV patients; c. The monthly distribution of IgAV patients by years; d. The monthly variations in the average annual number of cases before, during and after the pandemic; Supplementary Figure 3. The distribution of BVAS between GI manifestations after purpura and GI manifestation prior to purpura. (ns p>0.05); Supplementary Figure 4. Representative renal pathological images obtained from 79 IgAVN patients. A-H: Class-II (31 cases), -IIIa (12 cases), -IIIb (33 cases) and -Ⅳ (1 case), light microscopy, glomerulus (A-D: hematoxylin and eosin stain, E-H: Periodic Schiff-Methenamine staining, original magnification × 400). I-N: The highest intensity of Immune complex deposits (I: 4+ IgA staining in 5 patients, J: 3+ IgG staining in 1 case, K: 3+ IgM staining in 3 cases, L: 3+ C3 staining in 9 cases, M: 3+ kappa staining in 24 cases, N: 2+ lambda staining in 23 cases, original magnification × 400); Supplementary Table 1. Multivariate logistic regression analysis of factors related to recurrence/relapse; Supplementary Table 2. ISKDC classifications and immunofluorescence features in GI and non-GI groups