IGHA1 and glomerulosclerosis: Serum Gd-IgA1 levels were not correlated with the degree of mesangial IgA deposition (Figure 6(d)) and the histological severity of IgAN including mesangial proliferation, crescent formation, glomerular sclerosis, tubular atrophy, interstitial fibrosis, and activity index (Figure 6(e)) and chronicity index (Figure 6(f)).