Detecting haplotype effects in genomewide association studies.
Genet Epidemiol
; 31(8): 803-12, 2007 Dec.
Article
em En
| MEDLINE
| ID: mdl-17549762
ABSTRACT
The analysis of genomewide association studies requires methods that are both computationally feasible and statistically powerful. Given the large-scale collection of single nucleotide polymorphisms (SNPs), it is desirable to explore the information contained in their interrelationships. In particular, utilizing haplotypes rather than individual SNPs and accounting for correlations of polymorphisms in adjustment for multiple testing can lead to increased power. We present a statistically powerful and numerically efficient method based on sliding windows of adjacent SNPs to detect haplotype-disease association in genomewide studies. This method consists of an efficient algorithm to calculate a proper likelihood-ratio statistic for any given window of SNPs, along with an accurate and efficient Monte Carlo procedure to adjust for multiple testing. Simulation studies using the HapMap data showed that the proposed method performs well in realistic situations. We applied the new method to a case-control study on rheumatoid arthritis and identified several loci worthy of further investigations.
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Bases de dados:
MEDLINE
Assunto principal:
Algoritmos
/
Haplótipos
/
Genoma Humano
/
Doenças Genéticas Inatas
Tipo de estudo:
Evaluation_studies
/
Observational_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Genet Epidemiol
Assunto da revista:
EPIDEMIOLOGIA
/
GENETICA MEDICA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos