BollandMJ, AvenellA, BaronJA, et al. Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis. BMJ2010; 341: c3691.
2.
BollandMJ, GreyA, ReidIR. Misclassification does not explain increased cardiovascular risks of calcium supplements. J Bone Miner Res2012; 27: 959. DOI: 10.1002/jbmr.1568
3.
LewisJR, ZhuK, PrinceRL. Adverse events from calcium supplementation: relationship to errors in myocardial infarction self-reporting in randomized controlled trials of calcium supplementation. J Bone Miner Res2012; 27: 719–22. DOI: 10.1002/jbmr.1484
4.
PrinceRL, DevineA, DhaliwalSS, DickIM. Effects of calcium supplementation on clinical fracture and bone structure: results of a 5-year, double-blind, placebo-controlled trial in elderly women. Arch Intern Med2006; 166: 869–75.
5.
BarrEL, TonkinAM, WelbornTA, ShawJE. Validity of self-reported cardiovascular disease events in comparison to medical record adjudication and a statewide hospital morbidity database: the AusDiab Study. Intern Med J2009; 39: 49–53.
6.
The RECORD Trial Group. Oral vitamin D3 and calcium for secondary prevention of low-trauma fractures in elderly people (Randomised Evaluation of Calcium Or vitamin D, RECORD): a randomised placebo-controlled trial. Lancet2005; 365: 1621–8.
7.
BaronJA, BeachM, MandelJS, et al. Calcium supplements for the prevention of colorectal adenomas. Calcium Polyp Prevention Study Group. N Engl J Med1999; 340: 101–7.
8.
TangBM, EslickGD, NowsonC, SmithC, BensoussanA. Use of calcium or calcium in combination with vitamin D supplementation to prevent fractures and bone loss in people aged 50 years and older: a meta-analysis. Lancet2007; 370: 657–66.
9.
HennekensCH, BariceEJ. Calcium supplements and risk of myocardial infarction: a hypothesis formulated, but not yet adequately tested. Am J Med2011; 124: 1097–8.
10.
LewisJR, CalverJ, ZhuK, FlickerL, PrinceRL. Calcium supplementation and the risks of atherosclerotic vascular disease in older women: results of a 5-year RCT and a 4.5-year follow-up. J Bone Miner Res2011; 26: 35–41.
11.
BollandMJ, GreyA, AvenellA, GambleGD, ReidIR. Calcium supplements with or without vitamin D and risk of cardiovascular events: reanalysis of the Women's Health Initiative limited access dataset and meta-analysis. BMJ2011; 342: d2040.
12.
AbrahamsenB, SahotaP. Do calcium plus vitamin D supplements increase cardiovascular risk? Insufficient evidence is available to support or refute the association. BMJ2011; 342: 1–2;d2080. doi: 11.1136/bmj.d2080
13.
BrazierM, GradosF, KamelS, et al. Clinical and laboratory safety of one year's use of a combination calcium + vitamin D tablet in ambulatory elderly women with vitamin D insufficiency: results of a multicenter, randomized, double-blind placebo-controlled study. Clin Ther2005; 27: 1885–93.
14.
MarxA, BucherHC. Numbers needed to treat derived from meta-analysis: a word of caution. ACP J Club2003; 138: A11–2.
15.
KarpHJ, KetolaME, Lamberg-AllardtCJE. Acute effects of calcium carbonate, calcium citrate, and potassium citrate on markers of calcium and bone metabolism in young women. Br J Nut2009; 102: 1341–7. DOI: 10.1017/S0007114509990195.
16.
LiK, KaaksR, LinseisenJ, RohrmannS. Associations of dietary calcium intake and calcium supplementation with myocardial infarction and stroke risk and overall cardiovascular mortality in the Heidelberg cohort of the European Prospective Investigation into Cancer and Nutrition Study (EPIC-Heidelberg). Heart2012; 98: 920–5. DOI:10.1136/heartjnl-2011-301345.
17.
NordinBEC, LewisJR, DalyRM, et al. The calcium scare—what would Austin Bradford Hill have thought?Osteoporos Int2011; 22: 3073–7.
18.
The National Osteoporosis Foundation responds to study linking calcium supplements to increased heart attack risk. http://www.nof.org/node/807 (accessed 2012 Jun 5).