title: A highly significant difference in baseline characteristics: the play of chance or evidence of a more selective game?
authors.affiliation: Department of Public Health, University of Aberdeen Medical School, Foresterhill, Aberdeen, AB25 2ZD, UK. P.Fayers@abdn.ac.uk
authors.forename: Peter M
authors.initials: PM
authors.lastname: Fayers
authors.forename: Madeleine
authors.initials: M
authors.lastname: King
mesh_terms: D005260:Female; D006801:Humans; D018579:Patient Selection; D016032:Randomized Controlled Trials as Topic / Q000592:standards; D012107:Research Design; D035842:Research Subjects