Letters Calcium, vitamin D, and risk

Authors’ response to editorial

BMJ 2011; 342 doi: http://dx.doi.org/10.1136/bmj.d3520 (Published 07 June 2011) Cite this as: BMJ 2011;342:d3520
  1. Mark J Bolland, senior research fellow1,
  2. Andrew Grey, associate professor of medicine1,
  3. Ian R Reid, professor of medicine1
  1. 1Department of Medicine, University of Auckland, Private Bag 92 019, Auckland 1142, New Zealand
  1. m.bolland{at}auckland.ac.nz

We disagree with the editorial accompanying our recent paper on calcium, vitamin D, and cardiovascular risk.1 2

The primary analyses in our 2010 meta-analysis counted people not events.3 The increased risk of myocardial infarction should not be discounted because the P value for the increased risk of the composite cardiovascular end point was 0.057. Analysis by fifths of dietary calcium intake …

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