Fig. 1From: New clues to the nature of immunoglobulin G4-related disease: a retrospective Japanese multicenter study of baseline clinical features of 334 casesPearson’s product-moment correlation coefficients for serum levels of C3 and IgG4 or other IgG subclass (IgG-IgG4). In the analysis of all patients, the serum level of C3 and that of both IgG4 and IgG-IgG4 showed inverse correlations (a, b). However, in the analysis of patients with kidney lesion, the serum level of C3 and serum level of IgG-IgG4 except for IgG4 showed inverse correlations (c, d)Back to article page