title: Baseline distribution and conditional size.
abstract: Analytic results are presented for the effect of baseline distribution on the conditional size of various hypothesis or significance tests of treatment that may be performed in a two-group trial. These analytic results may be substituted for results achieved via simulation and previously published in this journal.
authors.forename: S
authors.initials: S
authors.lastname: Senn
mesh_terms: D000704:Analysis of Variance; D002986:Clinical Trials as Topic / Q000706:statistics & numerical data*; D015233:Models, Statistical