Ophthalmic statistics note: the perils of dichotomising continuous variables
Phillippa M Cumberland, Gabriela Czanner, Catey Bunce, Caroline J Doré, Nick Freemantle, Marta García-Fiñana, On behalf of the Ophthalmic Statistics Group
British Journal of Ophthalmology Jun 2014, 98 (6) 841-843; DOI: 10.1136/bjophthalmol-2014-304930