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流行病学调查中不同的资料收集途径其在真实性和可靠性方面可能不尽一致，为评价病人及其代理人（如配偶）对问表问题的回答一致性（可靠性），作者分别对50例肺癌病人及其代理人进行了面对面访问调查。结果示，对计量资料两者回答的基本一致率为84．1％，经配对t检验除吸烟开始年龄外，余均差异无显著性（P＞0．05）；对计数资料比较表明，平均一致率为87．8％，各项目经Kappa一致性检验，P均小于0．001。结果与国外文献报道基本一致，并提示在实际工作中对死亡病例作为研究对象，则可以从其代理人那里采集所需的资料。
Different approaches to data collection in epidemiological surveys may not be consistent in their authenticity and reliability. In order to assess the consistency (reliability) of the responses of patients and their agents (eg spouses) to questions on the questionnaire, 50 cases of lung cancer patients and their agents conducted a face-to-face interview. The results showed that the basic consistent rate of the answer to the measurement data was 84.1%. There was no significant difference (P> 0.05) between the two groups except the starting age of smoking by paired t-test. Comparing the count data showed that the average The concordance rate was 87.8%. The Kappa consistency test of each item, P were less than 0.001. The results are basically consistent with those reported in foreign literature and suggest that in the actual work of death cases as the research object, you can collect the necessary information from their agents.