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Statistics review 9: One-way analysis of variance

Viv Bewick1*, Liz Cheek1 and Jonathan Ball2

Author Affiliations

1 Senior Lecturer, School of Computing, Mathematical and Information Sciences, University of Brighton, Brighton, UK

2 Lecturer in Intensive Care Medicine, St George's Hospital Medical School, London, UK

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Critical Care 2004, 8:130-136 doi:10.1186/cc2836

Published: 1 March 2004

Abstract

This review introduces one-way analysis of variance, which is a method of testing differences between more than two groups or treatments. Multiple comparison procedures and orthogonal contrasts are described as methods for identifying specific differences between pairs of treatments.

Keywords:
analysis of variance; multiple comparisons; orthogonal contrasts; type I error