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Open Access Research article

A randomised controlled trial to assess the effectiveness of offering study results as an incentive to increase response rates to postal questionnaires [ISRCTN26118436]

Sarah Cockayne* and David J Torgerson

BMC Medical Research Methodology 2005, 5:34  doi:10.1186/1471-2288-5-34

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Correction to typographical error in figure 1

Sarah Cockayne   (2010-10-18 13:46)  University of York email

Since the paper has been published the authors have noted that there is a typographical error in figure one. The words 'intervention' and 'control' have accidentally been put in the wrong box. It should read allocated to control (n=250) allocated to intervention (n=788).

Competing interests

None.

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