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五、关于癌症基线发生率我国曾于1973—1977年在全国29个省、市、自治区进行了关于恶性肿瘤死亡率的调查。由这份调查资料给出的男女合计三项死亡率指标与同时期美国相应的数据相比,发现美国的数值均较高(表6),男女分计的情况亦如此。此外,还发现主要癌症的分布亦不同,中国居民中癌症发生率最高的是胃癌、食管癌和肝癌;而美国则是肺癌和直肠癌(表7)。
V. About Baseline Incidence of Cancer China conducted a survey on the mortality rate of malignant tumors in 29 provinces, municipalities and autonomous regions across the country from 1973 to 1977. According to the survey data, the three gender mortality indicators for men and women compared with the corresponding data in the United States at the same time found that the United States has a higher value (Table 6), as does the distribution of males and females. In addition, the distribution of major cancers has also been found to be different. The highest incidence of cancer among Chinese residents is gastric cancer, esophageal cancer and liver cancer; while the United States is lung cancer and rectal cancer (Table 7).