Journal article

Publication year: 2009

Pages: 18-26

Journal: Journal of Biotechnology

Volume number: 140

Issue number: 1-2

ISSN: 0168-1656

eISSN: 1873-4863

DOI Link: https://doi.org/10.1016/j.jbiotec.2009.01.009

Publisher: Elsevier

Abstract: 
Microarray analysis has become a popular and routine method in functional genomics. It is typical for such experiments to involve a small number of replicates, which causes Unreliable estimates of the sample variance. Microarrays have fostered the development of new statistical methods to analyze data resulting from experiments with small sample sizes. In this study, we tackle the problem of evaluating the performance of statistical tests for generating ranked gene lists from two-channel direct comparisons. We propose all evaluation method based oil a oligonucleotide microarray with a large number of replicate spots yielding a maximum) of 400 replicates per gene. We apply Spearman's rank correlation coefficient to ranked gene-lists generated by eight widely used microarray specific test statistics, which are applied to small random samples. We could show that variance stabilizing methods such as Cyber-T, SAM, and LIMMA can he beneficial for very small sample sizes and that SAM and the t-test provide stronger control of the type I error rate than the other methods. Specifically, we report that for four replicates all methods to very high correlation with our reference standard.

Harvard Citation style: Dondrup, M., Hüser, A., Mertens, D. and Goesmann, A. (2009) An evaluation framework for statistical tests on microarray data, Journal of Biotechnology, 140(1-2), pp. 18-26. https://doi.org/10.1016/j.jbiotec.2009.01.009

APA Citation style: Dondrup, M., Hüser, A., Mertens, D., & Goesmann, A. (2009). An evaluation framework for statistical tests on microarray data. Journal of Biotechnology. 140(1-2), 18-26. https://doi.org/10.1016/j.jbiotec.2009.01.009