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移民具有遗传特性比较稳定、地理环境变化大、生活方式逐渐适应新地区的特点。因此,对定居的移民与本地人进行肿瘤流行病学的对比分析,相当于集体配对研究的方法,可为肿瘤病因学研究提供重要的线索(如体质特点、地理环境等),特别对于某些病因可能与地理环境有关的肿瘤,有更大的参考价值。食管癌是我国常见的恶性肿瘤之一。全国对共病因进行了大量的研究,取得了较大的进展。为配合全国食管癌病因研究工作,我们进行了定居在钟祥县大柴湖区的河南省淅川县移民及本地人的食管癌死亡率对比调查工作,结果如下。
Immigrants with a stable genetic characteristics, geographical changes, lifestyles gradually adapt to the characteristics of the new region. Therefore, comparative analysis of tumor epidemiology between settled immigrants and locals is equivalent to the method of collective matching study, which can provide important clues (such as physical characteristics, geographical environment, etc.) for the study of tumor etiology, especially for some Etiology may be related to the geographical environment of the tumor, have a greater reference value. Esophageal cancer is one of the common malignant tumors in our country. The country has conducted a great deal of research on the cause of comorbidity and made great progress. To tie in with the etiological research of esophageal cancer in China, we conducted a comparative survey of esophageal cancer mortality among immigrants and locals who settled in Daxihu Lake, Zhongxiang County, Henan Province. The results are as follows.