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DOI | 10.1093/aje/kws442 |
Specimen Pooling for Efficient Use of Biospecimens in Studies of Time to a Common Event | |
Saha-Chaudhuri, Paramita1; Weinberg, Clarice R.2 | |
发表日期 | 2013-07-01 |
ISSN | 0002-9262 |
卷号 | 178期号:1页码:126-135 |
英文摘要 | For case-control studies that rely on expensive assays for biomarkers, specimen pooling offers a cost-effective and efficient way to estimate individual-level odds ratios. Pooling helps to conserve irreplaceable biospecimens for the future, mitigates limit-of-detection problems, and enables inclusion of individuals who have limited available volumes of biospecimen. Pooling can also allow the study of a panel of biomarkers under a fixed assay budget. Here, we extend this method for application to discrete-time survival studies. Assuming a proportional odds logistic model for risk of a common outcome, we propose a design strategy that forms pooling sets within those experiencing the outcome at the same event time. We show that the proposed design enables a cost-effective analysis to assess the association of a biomarker with the outcome. Because the standard likelihood is slightly misspecified for the proposed pooling strategy under a nonnull biomarker effect, the proposed approach produces slightly biased estimates of exposure odds ratios. We explore the extent of this bias via simulations and illustrate the method by revisiting a data set relating polychlorinated biphenyls and 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene to time to pregnancy. |
英文关键词 | discrete event time outcome;pooling;pooling for biomarker;pooling for exposure;time to pregnancy |
语种 | 英语 |
WOS记录号 | WOS:000321449400012 |
来源期刊 | AMERICAN JOURNAL OF EPIDEMIOLOGY
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来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/59326 |
作者单位 | 1.Duke Univ, Sch Med, Dept Biostat & Bioinformat, Durham, NC 27710 USA; 2.Natl Inst Environm Hlth Sci, Biostat Branch, Res Triangle Pk, NC USA |
推荐引用方式 GB/T 7714 | Saha-Chaudhuri, Paramita,Weinberg, Clarice R.. Specimen Pooling for Efficient Use of Biospecimens in Studies of Time to a Common Event[J]. 美国环保署,2013,178(1):126-135. |
APA | Saha-Chaudhuri, Paramita,&Weinberg, Clarice R..(2013).Specimen Pooling for Efficient Use of Biospecimens in Studies of Time to a Common Event.AMERICAN JOURNAL OF EPIDEMIOLOGY,178(1),126-135. |
MLA | Saha-Chaudhuri, Paramita,et al."Specimen Pooling for Efficient Use of Biospecimens in Studies of Time to a Common Event".AMERICAN JOURNAL OF EPIDEMIOLOGY 178.1(2013):126-135. |
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