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Robust Regression Analysis of Copy Number Variation Data based on a Univariate Score
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Published Date:Feb 07 2014
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Publisher's site:
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Source:PLoS One. 2014; 9(2).
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[PDF-539.42 KB]
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Description:Motivation
The discovery that copy number variants (CNVs) are widespread in the human genome has motivated development of numerous algorithms that attempt to detect CNVs from intensity data. However, all approaches are plagued by high false discovery rates. Further, because CNVs are characterized by two dimensions (length and intensity) it is unclear how to order called CNVs to prioritize experimental validation.
Results
We developed a univariate score that correlates with the likelihood that a CNV is true. This score can be used to order CNV calls in such a way that calls having larger scores are more likely to overlap a true CNV. We developed cnv.beast, a computationally efficient algorithm for calling CNVs that uses robust backward elimination regression to keep CNV calls with scores that exceed a user-defined threshold. Using an independent dataset that was measured using a different platform, we validated our score and showed that our approach performed better than six other currently-available methods.
Availability
cnv.beast is available at http://www.duke.edu/~asallen/Software.html.
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