Statistics review 3: Hypothesis testing and P values

doi:10.1186/cc1493

Critical Care
Volume 6
Issue 3

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

A correction for this article has been published in Critical Care 2003, 7:15

Review

Statistics review 3: Hypothesis testing and P values

Elise Whitley¹ and Jonathan Ball²

¹Lecturer in Medical Statistics, University of Bristol, Bristol, UK

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

Critical Care 2002, 6:222-225doi:10.1186/cc1493


Published:	18 March 2002

Abstract

The present review introduces the general philosophy behind hypothesis (significance) testing and calculation of P values. Guidelines for the interpretation of P values are also provided in the context of a published example, along with some of the common pitfalls. Examples of specific statistical tests will be covered in future reviews.