大肠癌发病地理特征的趋势面分析

了解嘉善县大肠癌发病的地理分布特征及地理趋势，为研究大肠癌的病因提供一些线索，嘉善县大肠癌发病率有地域差异，应进一步研究各地区地理环境、生活习惯、经济状况等因素的差异及其与大肠癌的关系，对于存在异常残差值的地区，应作为重点研究对象。探讨这些地区可能存在的某种保护或危险因素。

Study on the Geographic Distribution of the Incidence Rate of Colorectal Cancer with Trend-Surface Analysis

To study the geographic distribution and tendency for colorectal cancer incidence in Jiashan county and then to offer some clues for the etiological factors of colorectal cancer. The incidence rate of the colorectal cancer varies geographically in Jiashan county. Research should be performed on the difference of the environment, living habit and the economic situation in different areas, and the relationship between these factors and colorectal cancer. Attention should also be paid to the areas whose residual values are anomalous to study the particular protecting or hazardous factors.