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2010 ; 42
(7
): 570-5
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Estimation of effect size distribution from genome-wide association studies and
implications for future discoveries
#MMPMID20562874
Park JH
; Wacholder S
; Gail MH
; Peters U
; Jacobs KB
; Chanock SJ
; Chatterjee N
Nat Genet
2010[Jul]; 42
(7
): 570-5
PMID20562874
show ga
We report a set of tools to estimate the number of susceptibility loci and the
distribution of their effect sizes for a trait on the basis of discoveries from
existing genome-wide association studies (GWASs). We propose statistical power
calculations for future GWASs using estimated distributions of effect sizes.
Using reported GWAS findings for height, Crohn's disease and breast, prostate and
colorectal (BPC) cancers, we determine that each of these traits is likely to
harbor additional loci within the spectrum of low-penetrance common variants.
These loci, which can be identified from sufficiently powerful GWASs, together
could explain at least 15-20% of the known heritability of these traits. However,
for BPC cancers, which have modest familial aggregation, our analysis suggests
that risk models based on common variants alone will have modest discriminatory
power (63.5% area under curve), even with new discoveries.
|*Polymorphism, Single Nucleotide
[MESH]
|Algorithms
[MESH]
|Body Height/genetics
[MESH]
|Breast Neoplasms/genetics
[MESH]
|Colorectal Neoplasms/genetics
[MESH]
|Crohn Disease/genetics
[MESH]
|Female
[MESH]
|Gene Frequency
[MESH]
|Genetic Predisposition to Disease/*genetics
[MESH]