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Letters Calcium, vitamin D, and risk

A reanalysis too far?

BMJ 2011; 342 doi: (Published 07 June 2011) Cite this as: BMJ 2011;342:d3538
  1. A V Metcalfe, associate professor in statistics1,
  2. B E Christopher Nordin, emeritus endocrinologist2
  1. 1School of Mathematical Sciences, North Terrace Campus, University of Adelaide, Adelaide, SA 5005, Australia
  2. 2Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide SA 5000, Australia
  1. andrew.metcalfe{at}

One of the remarkable features of the paper by Bolland and colleagues on the risk from calcium supplementation and vitamin D is its failure to draw attention to the hazard ratio of 0.84 in favour of calcium supplements for deaths from all causes in the “any personal …

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