Figure 3: Levels of serum IgG4 in study groups.

Levels of serum IgG4 in patients with autoimmune pancreatitis (AIP, n = 61), acute pancreatitis (AP, n = 50), ordinary chronic pancreatitis (CP, n = 40), pancreatic cancer (Pca, n = 74), miscellaneous pancreatic diseases (MP, n = 15) and normal pancreas (NP, n = 98). Each horizontal bar represents the median value of serum IgG4 in each study group. Significance: *P < 0.001 for AIP with respect to each non-AIP group, **P = 0.78 between groups of non-AIP.