Serum Gd-IgA1 levels in each non-IgA glomerular disease were as follows: for patients < 12 years, MC (977 ng/ml, 407–3890 ng/ml), FSGS (2042 ng/ml, 1950–2089 ng/ml), MN (2399 ng/ml, 2344–2692 ng/ml), and LN (2818 ng/ml, 1820–12022 ng/ml) and for patients ≥ 12 years, MC (2818 ng/ml, 1096–4074 ng/ml), FSGS (3090 ng/ml, 1820–3802 ng/ml), and LN (7413 ng/ml, 1862–11482 ng/ml). Here, IGHA1 is linked to glomerular disorder.