An introduction to analysis of variance (ANOVA) with special reference to data from clinical experiments in optometry

Richard A. Armstrong*, S.V. Slade, Frank Eperjesi

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

This article is aimed primarily at eye care practitioners who are undertaking advanced clinical research, and who wish to apply analysis of variance (ANOVA) to their data. ANOVA is a data analysis method of great utility and flexibility. This article describes why and how ANOVA was developed, the basic logic which underlies the method and the assumptions that the method makes for it to be validly applied to data from clinical experiments in optometry. The application of the method to the analysis of a simple data set is then described. In addition, the methods available for making planned comparisons between treatment means and for making post hoc tests are evaluated. The problem of determining the number of replicates or patients required in a given experimental situation is also discussed. Copyright (C) 2000 The College of Optometrists.

Original languageEnglish
Pages (from-to)235-241
Number of pages7
JournalOphthalmic and Physiological Optics
Volume20
Issue number3
DOIs
Publication statusPublished - May 2000

Keywords

  • eye care practitioner
  • advanced clinical research
  • analysis of variance
  • ANOVA

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