Cumulative meta-analysis for genetic association: when is a new study worthwhile?

Abstract excerpt

OBJECTIVES: In this paper, we address the questions: how large a sample size would be required to show genome-wide significance between a single nucleotide polymorphism (SNP) and a genetic trait in a meta-analysis of a newly planned study together with the existing ones? Or alternatively: will a planned study of size n be able to provide evidence of a genetic association when this study is combined with a current...

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