Results: Median Pepsinogen I levels in gastric cancer group was 41.07 ng / ml (25% quartile: 27.83 ng / ml, 75% quartile: 61.57 ng / ml) was significantly lower in control group: 102.03 ng / ml (25% quartile: 57.63 ng / ml, 75% quartile: 129.32 ng / ml) (p<0.001).