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  • Title: Calcium supplementation, cardiovascular disease and mortality in older women.
    Author: Shah SM, Carey IM, Harris T, DeWilde S, Cook DG.
    Journal: Pharmacoepidemiol Drug Saf; 2010 Jan; 19(1):59-64. PubMed ID: 19757413.
    Abstract:
    PURPOSE: To investigate the long-term cumulative effect of calcium and vitamin D supplementation on cardiovascular outcomes and death in older women. METHODS: We undertook an observational cohort study using UK electronic primary care records in the Doctor's Independent Network (DIN-LINK) database; 9910 women aged 60-89 who started calcium and vitamin D supplementation between 2000 and 2005, with no heart disease or stroke history and who survived disease free for 2 years after supplement initiation were studied. The main outcome was first occurrence of myocardial infarction (MI), stroke or death more than 2 years after initiation. RESULTS: In the period from 2 years after supplement initiation, women who had received >600 days supplementation in these first 2 years were no more at risk of MI, stroke or death (hazard ratio 0.82 (0.67-1.01)) compared to women who received < or = 90 days supplementation in the first 2 years. Outcomes in the first 2 years were analysed separately and showed similar baseline risks in our comparison groups. CONCLUSION: Two years after initiation, women who have consistently received supplementation with calcium and vitamin D do not experience more cardiovascular events or deaths than women who received minimal supplementation.
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