Effects of dependence in high-dimensional multiple testing problems.
Effects of dependence in high-dimensional multiple testing problems.
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DOI:
10.1186/1471-2105-9-114
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发表时间:
2008-02-25
影响因子:
3
通讯作者:
van de Wiel MA
中科院分区:
文献类型:
--
作者:
Kim KI;van de Wiel MA
We consider effects of dependence among variables of high-dimensional data in multiple hypothesis testing problems, in particular the False Discovery Rate (FDR) control procedures. Recent simulation studies consider only simple correlation structures among variables, which is hardly inspired by real data features. Our aim is to systematically study effects of several network features like sparsity and correlation strength by imposing dependence structures among variables using random correlation matrices. We study the robustness against dependence of several FDR procedures that are popular in microarray studies, such as Benjamin-Hochberg FDR, Storey's q-value, SAM and resampling based FDR procedures. False Non-discovery Rates and estimates of the number of null hypotheses are computed from those methods and compared. Our simulation study shows that methods such as SAM and the q-value do not adequately control the FDR to the level claimed under dependence conditions. On the other hand, the adaptive Benjamini-Hochberg procedure seems to be most robust while remaining conservative. Finally, the estimates of the number of true null hypotheses under various dependence conditions are variable. We discuss a new method for efficient guided simulation of dependent data, which satisfy imposed network constraints as conditional independence structures. Our simulation set-up allows for a structural study of the effect of dependencies on multiple testing criterions and is useful for testing a potentially new method on π0 or FDR estimation in a dependency context.
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影响因子:
2.7
作者:
Benjamini, Yoav;Krieger, Abba M.;Yekutieli, Daniel
通讯作者:
Yekutieli, Daniel
DOI:
10.1111/j.1467-9868.2005.00509.x
发表时间:
2005-01-01
影响因子:
5.8
作者:
Owen, AB
通讯作者:
Owen, AB
DOI:
10.1111/1467-9868.00346
发表时间:
2002-01-01
影响因子:
5.8
作者:
Storey, JD
通讯作者:
Storey, JD
DOI:
10.1073/pnas.091062498
发表时间:
2001-04-24
影响因子:
11.1
作者:
Tusher, VG;Tibshirani, R;Chu, G
通讯作者:
Chu, G
DOI:
10.1111/j.1369-7412.2003.05527.x
发表时间:
2004-01-01
影响因子:
5.8
作者:
Black, MA
通讯作者:
Black, MA