title: Statistics notes. Interaction 2: Compare effect sizes not P values.
authors.affiliation: Department of Medical Statistics, University of Newcastle, Newcastle upon Tyne.
authors.forename: J N
authors.initials: JN
authors.lastname: Matthews
authors.forename: D G
authors.initials: DG
authors.lastname: Altman
mesh_terms: D000704:Analysis of Variance; D002986:Clinical Trials as Topic; D003627:Data Interpretation, Statistical