论文部分内容阅读
[目的]利用主成分分析探讨山东省恶性肿瘤死亡的地区分布特征。[方法]利用SAS软件对山东省22个县市区2004～2006年的20种恶性肿瘤标化死亡率和构成比分别进行协方差矩阵主成分分析。[结果]前3个主成分就反映了总体差异90%以上的信息,其中仅第1主成分就提供了总体差异一半以上的信息。第1主成分主要反映了食管癌的地区差异,第2主成分主要反映肺癌的地区差异,兼顾胃癌和肝癌。各地区第1主成分得分呈现西高东低的趋势,根据第1和第2主成分可以将调查地区分为若干类别,表现为明显的地理聚集性。[结论]山东省各地区恶性肿瘤死亡的总体差异主要取决于少数高发肿瘤,包括食管癌、肺癌、胃癌、肝癌等,其中以食管癌地位最为突出。如能进一步扩大分析范围,可更好地查明恶性肿瘤死亡的地区特征。
[Objective] To investigate the regional distribution of malignant tumor death in Shandong Province using principal component analysis. [Methods] The SAS software was used to analyze the standardized mortality and composition ratio of 20 malignant tumors in 22 counties and cities in Shandong from 2004 to 2006. [Results] The first three principal components reflect information with 90% or more of the overall difference, of which only the first principal component provides more than half of the total difference. The first principal component mainly reflects the regional difference of esophageal cancer, and the second principal component mainly reflects the regional difference of lung cancer, taking into account both gastric cancer and liver cancer. The score of the first principal component in each region shows a trend of increasing from the west to the east, and according to the first and the second principal components, the survey area can be divided into several categories, showing obvious geographical clustering. [Conclusion] The overall difference of malignant tumor deaths in different regions of Shandong Province mainly depends on a few high-grade tumors, including esophageal cancer, lung cancer, gastric cancer, and liver cancer. Among them, the status of esophageal cancer is the most prominent. If we can further expand the scope of analysis, we can better identify the regional characteristics of malignant tumor deaths.