湖北省土壤和地质因素与胃癌死亡相关性的研究

以湖北省78个县、市为研究对象,用单因素及多因素分析方法探讨了土壤、地质因素与胃癌死亡率的关系,直线相关分析表明与胃癌死亡率有显著性相关(双侧检验,P<0.05)的因素有:变质岩(r=0.6021)、酸性土(r=0.3751)、沉积岩(r=-0.2939)、砂土(r=0.2786)、碱性土(r=-0.2686)和二迭系地层(r=-0.2502)等6个因素;逐步回归分析表明在α=0.05时,变质岩、第三系地层和中性土三因素被选入回归方程,结合多元线性回归分析可知此三因素是与胃癌死亡率线性相关的主要因素。

An Investigation on the Correlation between the Soil-geology Factors and the Mortality of Gastric Cancer in Hubei Province

This article analyses the correlation between the soil-geology factors and the mortality of gastric cancer by using single-variate and multivariate methods in the 78 counties and cities of Hubei provin- ce.The results of the research showed that the correlation coefficients(r)of 6 factors with mortality of gastric cancer were statistically significant(two-sided test,P<0.05).These factors are metamor- phic rock(r=0.6021),acid soil(r=0.3751),alraline soil(r=-0.2686),roack,soil(r=0. 2786),permian stratum(r=-0.2502)and sedimentary rock(r=-0.2939).The stepwise re- gression analysis showed that when significant level equels 0.05,the factors selected into multiple re- gression equation were metamorphic rock,tertiary stratum and neutral soil.According to stepwise re- gression and multiple linear regression,we know that the 3 factors are the most important among all soil-geology factors in this research.