Letter

Review of publication bias in studies on publication bias: Mandatory publication of data may help

BMJ 2005; 331 doi: https://doi.org/10.1136/bmj.331.7517.638-b (Published 15 September 2005) Cite this as: BMJ 2005;331:638
  1. Jeffrey Mann, retired physician (jmannemg{at}earthlink.net)
  1. Salt Lake City, UT 84103, USA

    Editor—Glymour and Kawachi suggest a modest proposal to reduce publication bias, reviewed by Dubben and Beck-Bornholdt.1 Their suggestion is indeed modest because many statistically insignificant or negative studies are not necessarily submitted to a medical journal for publication.

    The only effective solution would be mandatory registration of all trials in a centralised website before the trial starts, with mandatory publication of the raw data on that centralised website irrespective of whether the trialists submit their results to a medical journal for publication. That solution would allow meta-analysts to collect data from all relevant studies and not only studies published in medical journals.

    Footnotes

    • Competing interests None declared.

    References

    1. 1.
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