Letters

Trial puts negative gloss on essentially positive results

BMJ 1995; 311 doi: https://doi.org/10.1136/bmj.311.7003.511 (Published 19 August 1995) Cite this as: BMJ 1995;311:511
  1. Andrew Vickers
  1. Director, information services Research Council for Complementary Medicine, London WC1N 3JF

    EDITOR,--It is well known that reports of trials tend to exaggerate differences between treatments.1 By using multiple end points, repeated measures, subgroup analyses, and statistical “data dredging” authors are often able to …

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