The major types of lesions were chronic superficial gastritis and chronic erosive gastritis, accounting for 50 percent.The incidence of gastric ulcer and duodenal ulcer was no more than 20 percents.

• 其中以慢性浅表性胃炎和慢性糜烂性胃炎为主，约占50%25，胃和十二指肠溃疡的发生率不足20%25。