Women's Health Initiative (WHI). Homo sapiens

This study was included as part of a GWAS consortium. The Women's Health Initiative (WHI) comprises a Clinical Trial (CT) arm, an Observational Study (OS) arm, and several extension studies, and through 40 clinical centers across the U.S. WHI recruited 161,808 post-menopausal women aged 50 to 79 years. WHI samples genotyped were identified utilizing the WHI August 2009 database. Cases were comprised of centrally adjudicated colon and colorectal cancer cases from the OS and CT who were not previously genotyped. A subset of cases and controls were selected for genotyping for this project.