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Determining the sample size in a clinical trial

Adrienne Kirby, Val Gebski and Anthony C Keech
Med J Aust 2002; 177 (5): 256-257.
Published online: 2 September 2002

Sample size must be planned carefully to ensure that the research time, patient effort and support costs invested in any clinical trial are not wasted. Item 7 of the CONSORT statement relates to the sample size and stopping rules of studies (see Box 1); it states that the choice of sample size needs to be justified.1

  • Adrienne Kirby1
  • Val Gebski2
  • Anthony C Keech3

  • NHMRC Clinical Trials Centre, University of Sydney, Camperdown, NSW.

Correspondence: enquiry@ctc.usyd.edu.au

Acknowledgements: 

The authors thank Rhana Pike, publications officer, for her assistance in preparing this article.

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