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  • Title: Statins and risk of cancer: a retrospective cohort analysis of 45,857 matched pairs from an electronic medical records database of 11 million adult Americans.
    Author: Marelli C, Gunnarsson C, Ross S, Haas S, Stroup DF, Cload P, Clopton P, DeMaria AN.
    Journal: J Am Coll Cardiol; 2011 Jul 26; 58(5):530-7. PubMed ID: 21777752.
    Abstract:
    OBJECTIVES: The purpose of this study was to determine whether cancer can be attributed to statin use among a general population of older adults in the United States with at least 3 years of follow-up. BACKGROUND: Statins are widely prescribed drugs in the United States for the management of dyslipidemia, atherosclerosis, and cardiovascular event risk reduction. Unsettled scientific debate about the association of statins with cancer continues, with high-profile studies showing conflicting results. METHODS: A retrospective cohort analysis of the incidence of cancer in older adults who have and who have not used statins was performed. More than 11 million analyzable patient records from January 1990 through February 2009 were drawn from the General Electric Centricity electronic medical records database. Propensity matching found pairs of patients receiving and not receiving statin therapy who shared similar propensities for statin use. RESULTS: Propensity score methods matched 45,857 comparison pairs of patients taking a statin and patients not taking a statin. The average time in the database was 8 years, with pairs being followed for an average of 4.6 and 4.7 years. After matching, the incidence of cancer in patients taking a statin was 11.37% compared with 11.11% in matched patients not taking a statin. Multivariate-matched Cox regression analysis showed a nonsignificant hazard ratio of 1.04 (95% confidence interval: 0.99 to 1.09). Kaplan-Meier curves for diagnosis of any cancer up to 10 years also showed no difference for patients taking a statin and those not taking a statin. CONCLUSIONS: This retrospective analysis of nearly 46,000 propensity-matched pairs demonstrated no statistically significant increased risk of cancer associated with statins.
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