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为调查四日市市区内大气污染对肺癌的影响,我们利用国民健康保险的接受者进行了肺癌就诊率的分析,利用死亡证书进行了肺癌死亡率的分析。结果如下: 1)肺癌就诊率与某一地区大气污染的程度呈成比例的平行关系,但与对照区相比较未发现有意义的差异。 2)在四日市,大气污染显著增加数年之后,肺癌死亡率显示上升趋势,但未发现肺癌死亡率和某些特殊污染物浓度两者间的有意义的相关。与对照区相比,污染区肺癌死亡率略高,且肺癌死亡年令更为年轻化。 3)而且,每天吸烟多于21支的比不吸烟者肺癌死亡率高。
In order to investigate the effects of air pollution in Yokkaichi City on lung cancer, we used the National Health Insurance recipients to analyze the incidence of lung cancer visits and analyzed death rates of lung cancer using death certificates. The results are as follows: 1) The rate of visits to lung cancer was proportional to the degree of atmospheric pollution in a certain area, but no significant difference was found compared with the control area. 2) After a significant increase in atmospheric pollution in Yokkaichi City for several years, the mortality rate of lung cancer showed an upward trend, but no meaningful correlation between lung cancer mortality and the concentration of certain special pollutants was found. Compared with the control area, the mortality rate of lung cancer in the contaminated area is slightly higher, and the annual age of lung cancer is even younger. 3) Moreover, lung cancer mortality is higher than non-smokers who smoke more than 21 cigarettes per day.