GAST and gastritis: However, patients in the normal stomach group had a significantly higher serum PG I/II ratio compared to those in the gastritis group (mean ± SD: 6.13 ± 1.26 vs. 2.90 ± 1.50, respectively; P < 0.05) and a significantly lower serum gastrin concentration (mean ± SD: 70.9 ± 27.8 vs. 182.5 ± 146.6 pg/mL, respectively) (Fig. 1b).