Fisher's combined p-value for detecting differentially expressed genes using Affymetrix expression arrays.
Fisher's combined p-value for detecting differentially expressed genes using Affymetrix expression arrays.
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DOI:
10.1186/1471-2164-8-96
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发表时间:
2007-04-09
期刊:
影响因子:
4.4
通讯作者:
Iyer H
中科院分区:
文献类型:
--
作者:
Hess A;Iyer H
Currently, most tests of differential gene expression using Affymetrix expression array data are performed using expression summary values representing each probe set on a microarray. Recently testing methods have been proposed which incorporate probe level information. We propose a new approach that uses Fisher's method of combining evidence from multiple sources of information. Specifically, we combine p-values from probe level tests of significance. The combined p method and other competing methods were compared using three spike-in datasets (where probe sets corresponding differentially spiked transcripts are known) and array data from a biological study validated with qRT-PCR. Based on power and false discovery rates computed for the spike-in datasets, we demonstrate that the combined p method compares favorably with other methods. We find that probe level testing methods select many of the same genes as differentially expressed. We illustrate the use of the combined p method for diagnostic purposes using examples. Combined p is a promising alternative to existing methods of testing for differential gene expression. In addition, the combined p method is particularly well suited as a diagnostic tool for exploratory analysis of microarray data.
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DOI:
10.1073/pnas.011404098
发表时间:
2001-01-02
影响因子:
11.1
作者:
Li, C;Wong, WH
通讯作者:
Wong, WH
影响因子:
12.3
作者:
Gentleman RC;Carey VJ;Bates DM;Bolstad B;Dettling M;Dudoit S;Ellis B;Gautier L;Ge Y;Gentry J;Hornik K;Hothorn T;Huber W;Iacus S;Irizarry R;Leisch F;Li C;Maechler M;Rossini AJ;Sawitzki G;Smith C;Smyth G;Tierney L;Yang JY;Zhang J
通讯作者:
Zhang J
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
影响因子:
3
作者:
Qin, LX;Beyer, RP;Hudson, FN;Linford, NJ;Morris, DE;Kerr, KF
通讯作者:
Kerr, KF
影响因子:
5.8
作者:
Cope, LM;Irizarry, RA;Speed, TP
通讯作者:
Speed, TP