Critical Care

official impact factor 4.60
Search for
Advanced search
Critical Care
Tools
Share this article
Erratum

Statistics review 3: Hypothesis testing and P values

Elise Whitley1 and Jonathan Ball2

Author Affiliations

1 Lecturer in Medical Statistics, University of Bristol, UK

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

Critical Care 2003, 7:15 doi:10.1186/cc1868


See related Review: http://ccforum.com/content/6/3/222


The electronic version of this article is the complete one and can be found online at:


Published:13 December 2002

© 2003 BioMed Central Ltd

Erratum

An erratum to Statistics review 3: Hypothesis testing and Pvalues, by Elise Whitley and Jonathan Ball.

In the original version of this article [1], the words 'if the null hypothesis is true' were omitted from the first sentence of the first key message. The key message should have read as follows:

'A P value is the probability that an observed effect is simply due to chance, if the Null hypothesis is true; it therefore provides a measure of the strength of an association. A P value does not provide any measure of the size of an effect, and cannot be used in isolation to inform clinical judgement.'

References

  1. Whitley E, Ball J: Statistics review 3: Hypothesis testing and P values.

    Crit Care 2002, 6:222-225. PubMed Abstract | BioMed Central Full Text | PubMed Central Full Text OpenURL