阳江高本底地区与对照地区调查人群可比性分析

目的分析阳江高本底辐射地区与对照地区调查人群的可比性，为精确评价流行病学调查结果提供基础。方法人口年龄性别构成比较用χ２检验，各种疾病死因构成与癌症死因构成及它们顺位的比较用秩和比法（ＲＳＲ）。结果两地区年龄性别构成总体差异具有非常显著性（Ｐ＜００１），但１５～６４岁组的年龄构成在两地区差异无显著性（Ｐ＞００５）；高本底辐射地区３个剂量组的年龄构成差异亦无显著性（Ｐ＞００５），他们的性别构成差别有显著性；前１０位死因构成与癌症死因构成在两地区间以及高本底地区组间比较均显示较高和谐度（ＷＲ＝０９５９０－０９８７９）。结论阳江高本底辐射地区癌症死亡率调查结果评价中按年龄性别进行调整是必要和适当的；各种疾病与癌症的死因谱在两地区及各群组间均具有良好可比性。

Comparability analysis of data from cohort members between high background radiation areas and control areas of Yangjiang, China

Objective The purpose of the study was to evaluate precisely the results from epidemiological investigation in high background radiation areas (HBRA) and control areas (CA). Methods The constituents for sex and age distributions of cohort members were analyzed using the method of chi square test;the sequences for the first ten causes of death and the first ten site specific cancer mortality rates were analyzed comparatively using the method of rank sum ratio(RSR). Results The results of constituents for sex age distribution among residents in HBRA and CA showed that there was a significant difference ( P <0 01),but in age group of 15 64 years,the results showed that there was no significant difference ( P >0 05).Among the three dose groups of HBRA,there was no statistically significant difference in age distribution ( P >0 05),but there existed a significant difference in sex distribution.The results from comparative analysis of the sequences for the first ten causes of death and the first ten site specific cancer mortality rates showed that they were almost identical between HBRA and CA,or among the three groups of HBRA (W R=0 9590 0 9879, P <0 05) Conclusion (1)It is necessary and suitable to adjust the results by sex and age for each dose group in HBRA compared with the control group for cancer analysis.(2)The results of the constituent ratios of causes of death and cancer mortality rate showed that there is good comparability between HBRA and CA,or among the dose groups.