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乳腺癌和子宫内膜癌的发病率在世界各地的分布差别很大。在东方及一些经济不发达的国家,这两种癌很少见,而在西方的一些国家却是妇女的常见病。例如,日本的乳腺癌发病率为美国的1/5,只本大阪的子宫内膜癌发病率为美国加里福尼亚州的1/30。这两种癌症在地理分布上具有高度的相关性(相关系数 r=0.73)。
The incidence of breast cancer and endometrial cancer varies widely across the world. Both in the East and in economically underdeveloped countries, these two cancers are rare, while in some Western countries they are common women’s diseases. For example, the incidence of breast cancer in Japan is 1/5 of that in the United States, while the incidence of endometrial cancer in Osaka alone is 1/30 of that in California, USA. The two cancers have a high degree of geographical distribution (correlation coefficient r = 0.73).