Letters

Cochrane Collaboration

BMJ 1994; 309 doi: http://dx.doi.org/10.1136/bmj.309.6967.1514c (Published 03 December 1994) Cite this as: BMJ 1994;309:1514
  1. David L Sackett
  1. Chair, Cochrane Collaboration Steering Group, Institute of Health Sciences, PO Box 77, Oxford OX3 7LF.

    EDITOR,—I wish to clear up three misconceptions about the Cochrane Collaboration's work which are mentioned in Fiona Godlee's editorial.1

    Firstly, the claim that the Cochrane Collaboration limits itself to randomised controlled trials is not true. Because so many ineffective and harmful treatments have been introduced on the basis of unreliable observational evidence we will continue to concentrate on randomised controlled trials as the first step in assessing the effects of health care. However, because we select topics for study on the …

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