Letters Calcium supplementation

Data were misrepresented

BMJ 2008; 336 doi: https://doi.org/10.1136/bmj.39493.484086.1F (Published 21 February 2008) Cite this as: BMJ 2008;336:404
  1. Wendy S Biggs, associate editor, Journal Watch for Women’s Health
  1. 1Midland Family Medicine Residency, 4005 Orchard Drive, Midland, MI 48670, USA
  1. wendy.biggs{at}midmichigan.org

    The “What this study adds” box accompanying the article by Bolland et al misrepresents the study data.1 The first bullet says that healthy older women randomised to calcium supplementation showed increased rates of myocardial infarction. Although the data show that women reported more events, analysis of New Zealand hospital records erased any significant difference in myocardial infarction rates between the calcium and placebo groups. …

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