Figure 4: Verification of serum GDF15 levels.

(A) Comparison of serum GDF15 levels among healthy volunteers (Normal), chronic gastritis patients (Gastritis), and DGC patients. *P < 0.05, **P < 0.01, by Welch’s T-test. (B,C) Subgroup analysis of serum GDF15 levels in DGC patients by wall invasion (B) and lymph node metastasis (C).