Bmj Usa: Letter


BMJ 2003; 327 doi: (Published 19 November 2003) Cite this as: BMJ 2003;327:E189

From BMJ USA 2003;Feb:93

Following are edited excerpts from Rapid Responses generated by this article, which can be read in their entirety at—Editor

Clarification needed about possible bias and statistical testing

  1. Adam Jacobs, director (
  1. Dianthus Medical, Ltd. London, UK
  2. University College London, London, UK

    EDITOR—I have two concerns about this study. First, I would like to know exactly what participants were told about the study (perhaps the authors could make the letter sent to participants available on This is important because of the subjective nature …

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