title: The problem of cogent subgroups: a clinicostatistical tragedy.
authors.affiliation: Clinical Epidemiology Unit, Yale University School of Medicine, New Haven, Connecticut 06520-8025, USA.
authors.forename: A R
authors.initials: AR
authors.lastname: Feinstein
mesh_terms: D001699:Biometry; D002965:Classification / Q000379:methods*; D003627:Data Interpretation, Statistical; D006801:Humans; D008962:Models, Theoretical; D012106:Research / Q000706:statistics & numerical data*