摘要
目的了解中国食管癌高、低发区土壤类型、植被类型及土壤有机碳密度（SOCD）的差异。方法建立全国1990年代抽样研究地区食管癌死亡率数据库，在ArcGIS9．1软件中制作相应研究地区的市、县界多边形电子地图并与疾病数据库链接，结合中国土壤及植被图运用多边形叠加分析的方法提取抽样地区土壤与植被类型，并计算土壤平均SOCD。比较食管癌高、低发区的土壤及植被类型及其分布比例，并对食管癌死亡率与相应地区平均SOCD进行等级相关分析。结果中国食管癌高、低发区的土壤与植被类型均存在着明显的差异。男、女食管癌死亡率与100cm及20cm的平均SOCD均存在着负相关，相关系数分别是0．504与0．575（男性，P值分别是0．004与0．001）及0．487与0．526（女性，P值分别为0．003与0．001）。结论食管癌死亡率的高低与所处地区的土壤、植被类型及SOCD均具有一定的相关性。
Objective To study the types of soil and vegetation as well as soil organic carbon densities （SOCD） from high and low risk areas of esophageal cancer （EC） in China. Methods Database from EC mortality survey in 1990 - 1992 in China was established in Excel. Digital polygon maps of study areas were created in ArcGIS 9.1 and linked with the database. The types of soil and vegetation from sampling areas were extracted from digital maps of soil type, vegetation type while the map of distribution on EC mortality was using the polygon overlay analysis. SOCD at depths of 100 cm and 20 cm of these areas were calculated, and spearman correlation analysis was used to evaluate the relationship between EC mortality and SOCD. Results The types of soil and vegetation and related distributions from high and low risk areas of EC in China showed obvious differences. There were both negative correlations between EC mortality and SOCD at depths of 100 cm and 20 cm. The correlation coefficients for man were -0.504 and -0.575 （P=0.004, 0.001 respectively）, and that for woman were -0.487 and 0.526 （P=0.003, 0.001 respectively）. Conclusion Mortality rate of esophageal cancer might correlate to SOCD, the types of soil and vegetation which called for further studies.
出处
《中华流行病学杂志》
CAS
CSCD
北大核心
2008年第1期44-47,共4页
Chinese Journal of Epidemiology
关键词
食管肿瘤
地理信息系统
土壤类型
植被类型
土壤有机碳密度
Esophageal neoplasms
Geographic information system
Soil type
Vegetation type
Soil organic carbon density
