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Why Odds Ratio Estimates Of Gwas Are Almost Always Close To 1.0, Yutaka Yasui
Why Odds Ratio Estimates Of Gwas Are Almost Always Close To 1.0, Yutaka Yasui
COBRA Preprint Series
“Missing heritability” in genome-wide association studies (GWAS) refers to the seeming inability for GWAS data to capture the great majority of genetic causes of a disease in comparison to the known degree of heritability for the disease, in spite of GWAS’ genome-wide measures of genetic variations. This paper presents a simple mathematical explanation for this phenomenon, assuming that the heritability information exists in GWAS data. Specifically, it focuses on the fact that the great majority of association measures (in the form of odds ratios) from GWAS are consistently close to the value that indicates no association, explains why this occurs, …