Participation rates in the selection of population controls in a case-control study of colorectal cancer using two recruitment methods.
Participation rates in the selection of population controls in a case-control study of colorectal cancer using two recruitment methods.
Tipus de Publicació:
Journal ArticleOrígen:
Gaceta sanitaria / S.E.S.P.A.S, Volume 25, Issue 5, p.353-6 (2011)URL:
http://www.elsevier.es/en/linksolver/ft/pii/S0213-9111(11)00110-5Resum:
Low participation rates in the selection of population controls are an increasing concern for the validity of case-control studies worldwide.
Pubmed ID:
21703726
