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Acta Ophthalmol (Copenh). 1993 Jun;71(3):296-300.

Visual acuity: calculating appropriate averages.

Author information

1
Department of Ophthalmology, University of Birmingham, UK.

Abstract

Controversy surrounds the averaging of visual acuity scores. We examine this debate and provide a series of guidelines and worked examples to enable investigators to select an average (e.g. arithmetic mean, geometric mean, median) appropriate for their data.

PMID:
8362626
[Indexed for MEDLINE]

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