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Emerg Med J 2003;20:453-458 doi:10.1136/emj.20.5.453
  • Statistics

An introduction to power and sample size estimation

  1. S R Jones1,
  2. S Carley2,
  3. M Harrison3
  1. 1North Manchester Hospital, Manchester, UK
  2. 2Royal Bolton Hospital, Bolton, UK
  3. 3North Staffordshire Hospital, UK
  1. Correspondence to:
 Dr S R Jones, Emergency Department, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK; 
 steve.r.jones{at}bigfoot.com

    Abstract

    The importance of power and sample size estimation for study design and analysis.

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