title: Paired versus unpaired significance testing: how improper statistical analysis altered interpretation of posterior surface changes after LASIK.
authors.forename: Cynthia J
authors.initials: CJ
authors.lastname: Roberts
authors.forename: William J
authors.initials: WJ
authors.lastname: Dupps
mesh_terms: D001696:Biomechanical Phenomena; D003315:Cornea / Q000503:physiopathology*; D003627:Data Interpretation, Statistical; D004108:Dilatation, Pathologic / Q000503:physiopathology; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D015233:Models, Statistical; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*