has_specified_output is_specified_output_of executes genotyping design test of association between categorical variables case-control study design genome-wide association study Orlaith Burke AGB, PRS Alejandra Gonzalez-Beltran GWAS study Genome wide association study is a kind of study whose objective is to detect association between genetic markers (SNP or otherwise) accross the genome and a trait which may be a disease or another phenotype (e.g. trait of agronomic relevance in animal or plant studies). Genome wide association study compare the allele frequencies in 2 populations, one free of the trait used as control, the other one showing the trait use as 'case'. GWAS studies implement case-control design Philippe Rocca-Serra whole genome association study odds ratio confidence interval genetic association study relative risk odds ratio homogeneity test allele frequency p-value