We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleData dredging, bias, or confounding.AuthorsSmith, George Davey; Ebrahim, ShahPublicationBMJ (Clinical research ed.), 2002, Vol 325, Issue 7378, p1437ISSN1756-1833Publication typeCommentaryDOI10.1136/bmj.325.7378.1437