title: Ophthalmic statistics note: the perils of dichotomising continuous variables.
authors.affiliation: Centre for Paediatric Epidemiology and Biostatistics, UCL Institute of Child Health, London, UK.
authors.forename: Phillippa M
authors.initials: PM
authors.lastname: Cumberland
authors.affiliation: Department of Biostatistics, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK Department of Eye and Vision Science, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Czanner
authors.affiliation: NIHR Biomedical Research Centre at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK.
authors.forename: Catey
authors.initials: C
authors.lastname: Bunce
authors.affiliation: UCL Clinical Trials Unit, University College London, London, UK.
authors.forename: Caroline J
authors.initials: CJ
authors.lastname: Doré
authors.affiliation: Department of Primary Care and Population Health & PRIMENT Clinical Trials Unit, University College London, London, UK.
authors.forename: Nick
authors.initials: N
authors.lastname: Freemantle
authors.affiliation: Department of Biostatistics, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK.
authors.forename: Marta
authors.initials: M
authors.lastname: García-Fiñana
mesh_terms: D015982:Bias; D035843:Biomedical Research; D003627:Data Interpretation, Statistical; D004812:Epidemiologic Methods; D009885:Ophthalmology / Q000706:statistics & numerical data*; D012044:Regression Analysis; D018401:Sample Size
keywords: Epidemiology