Accounting for errors in dose estimates used in studies of workers exposed to external radiation.

Accounting for errors in dose estimates used in studies of workers exposed to external radiation.
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解释暴露于外部辐射的工人研究中使用的剂量估计误差。

DOI:
10.1097/00004032-199801000-00003
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发表时间:
1998
期刊:
影响因子:
2.2
通讯作者:
Gilbert,ES
Gilbert,ES
中科院分区:
医学4区
文献类型:
--
作者:
Gilbert,ES

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本文讨论了在对暴露在外部辐射中的工人进行流行病学研究的数据的剂量反应分析中使用的剂量估计误差的解释方法,并以对汉福德现场工作人员的数据分析为例说明了这些方法。在这些分析中,对超额相对风险的估计被修正为作为器官剂量估计的记录剂量的偏差,而可信区间反映了修正因子中的不确定性。对于汉福德的数据,这些程序没有对除白血病以外的所有癌症的结果进行重大修改,但白血病的可信上限增加了约40%,这一差异在比较基于工作人员的估计和可信区间与作为辐射防护标准基础的估计时具有一定的重要性。有人认为,除了考虑修正系数的不确定性外,不需要额外的修正来解决由曝光能量和几何形状变化引起的随机误差。此外,由于在剂量反应分析中最有影响的较大累积剂量是大量独立剂量计读数的总和,实验室测量结果的变化导致的随机误差对流行病学目的不太可能是重要的。希望本文所阐述的方法将被应用于未来对工人研究数据的分析,特别是对来自几个国家的数据的联合分析。考虑到对系统偏差进行校正的因素中的不确定性将特别重要,因为抽样变化造成的不确定性减少。
This paper discusses approaches for accounting for errors in dose estimates used in dose-response analyses of data from epidemiologic studies of workers exposed to external radiation and illustrates these approaches with analyses of data on workers at the Hanford site. In these analyses, estimates of the excess relative risk are corrected for bias in recorded doses as estimates of organ dose, and confidence intervals reflect uncertainty in the correction factors. For the Hanford data, these procedures did not greatly modify results for all cancer excluding leukemia, but the upper confidence limit for leukemia was increased by about 40%, a difference that is of some importance in comparing worker-based estimates and confidence intervals with estimates that serve as the basis of radiation protection standards. It is argued that aside from taking account of uncertainty in correction factors, no additional corrections are needed to address random errors resulting from variation in exposure energies and geometries. In addition, it is shown that because the larger cumulative doses, which are most influential in dose-response analyses, are the sums of large numbers of independent dosimeter readings, random errors resulting from variation in laboratory measurements are unlikely to be important for epidemiologic purposes. It is hoped that the approaches illustrated in this paper will be applied to future analyses of data from worker studies, especially combined analyses of data from several countries. Taking account of uncertainty in factors that correct for systematic bias will be especially important as uncertainty resulting from sampling variation decreases.
分析职业暴露于低水平辐射的影响的问题。
DOI: --
发表时间: 1989
影响因子: 2
作者:
E. Gilbert
通讯作者: E. Gilbert
考虑相对风险回归中使用的暴露估计中系统偏差的不确定性
DOI: 10.2172/195768
发表时间: 1995
影响因子: 3.6
作者:
E. Gilbert
通讯作者: E. Gilbert
DOI: 10.2307/3578592
发表时间: 1994-05-01
期刊: RADIATION RESEARCH
影响因子: 3.4
作者:
CARPENTER, L;HIGGINS, C;SMITH, P
通讯作者: SMITH, P
1944--1989 年汉福德工人记录的外部辐射剂量汇总
DOI: 10.2172/10191620
发表时间: 1993
影响因子: 3.6
作者:
R. Buschbom;E. Gilbert
通讯作者: E. Gilbert
对汉福德工厂工作人员外部辐射源记录剂量的偏差和不确定性进行评估
DOI: 10.2172/10177505
发表时间: 1994
期刊: Radiation research
影响因子: 3.4
作者:
J. Fix;E. Gilbert;W. Baumgartner
通讯作者: W. Baumgartner