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Correspondence
Problems with epidemiological approach and conclusions
  1. Richard L Prince1,2,
  2. Christopher Nordin3,
  3. Joshua Richard Lewis1,2,
  4. Andrew Metcalfe4,
  5. Robin M Daly5
  1. 1School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia
  2. 2Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
  3. 3Endocrine and Metabolic Unit, Royal Adelaide Hospital, Adelaide, South Australia, Australia
  4. 4School of Mathematical Sciences, University of Adelaide, Adelaide, South Australia, Australia
  5. 5School of Exercise and Nutrition Sciences, Deakin University, Burwood, Victoria, Australia
  1. Correspondence to Professor Richard L Prince, School of Medicine & Pharmacology, University of Western Australia, 1st Floor, C Block Sir Charles Gairdner Hospital, Nedlands WA 6009, Australia; richard.prince{at}uwa.edu.au

http://dx.doi.org/10.1136/heartjnl-2012-302798

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    To the Editor: The findings on the association of calcium supplementation and myocardial infarction (MI) risk by Li et al 1 are based on a small number of events since there were only 7 or 20 reported MIs depending on which dataset is referred to. Furthermore, the data only applied to original users, not current or cumulative …

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