IGHG3 and autoimmune pancreatitis: In this subgroup, IgG1 was significantly higher in patients with PSC (mean ± standard deviation (SD), 8.2 ± 2.6 g/l) than in patients with AIP (6.7 ± 2.2 g/l) (p = 0.006), while no difference was observed for IgG3.