上世纪20年代,胃癌是美国最常见的恶性肿瘤,每年约死亡38000例,占全部癌症死亡例数的38%。20世纪30年代以后,胃癌的发病率逐步下降,直到20世纪70年代中期由于易感人群移民增多,其发病率略有上升。此后,根据胃癌的病因学开展了一系列流行病学研究,并根据主要致病因素展开预防工作。预防医学成果显著 In the 1920s, gastric cancer was the most common malignancy in the United States, accounting for about 38,000 deaths each year, accounting for 38% of all cancer deaths. After the 1930s, the incidence of gastric cancer gradually decreased until the mid-1970s, due to increased susceptibility to population migration, the incidence increased slightly. Since then, a series of epidemiological studies have been conducted based on the etiology of gastric cancer, and preventive work has been conducted on the basis of the major risk factors. Preventive medicine achieved remarkable results