This article is part of a series on Medical statistics, edited by Jonathan Ball, Viv Bewick and Liz Cheek.

Review

Statistics review 9: One-way analysis of variance

Viv Bewick¹ , Liz Cheek¹ and Jonathan Ball²

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

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

author email corresponding author email

Critical Care 2004, 8:130-136doi: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.