Figure 1. S100A8/A9 expression and receiver operating characteristic curve analyses in the serum of children with duodenal ulcer. (A) Summary of S100A8 expression. (B) Receiver operating characteristic curve analyses of S100A8. (C) Summary of S100A9 expression. (D) Receiver operating characteristic curve analyses of S100A9. H.pylori−: non-Helicobacter pylori infected, H.pylori+: Helicobacter pylori infected, DU−: non-duodenal ulcer, DU+: duodenal ulcer. *P < 0.05 compared with Control or H.pylori+DU+ group or H.pylori−DU+ group, n.s > 0.05 compared with Control or H.pylori+DU+ group.