title: Ophthalmic statistics note 1: unit of analysis.
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.forename: Krishna V
authors.initials: KV
authors.lastname: Patel
authors.forename: Wen
authors.initials: W
authors.lastname: Xing
authors.forename: Nick
authors.initials: N
authors.lastname: Freemantle
authors.forename: Caroline J
authors.initials: CJ
authors.lastname: Doré
mesh_terms: D035843:Biomedical Research; D006801:Humans; D009885:Ophthalmology / Q000193:education*; D013223:Statistics as Topic
keywords: Epidemiology; Medical Education