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Prev Cardiol. 2009 Spring;12(2):80-7. doi: 10.1111/j.1751-7141.2008.00018.x.

Low-density lipoprotein reduction and magnitude of cardiovascular risk reduction.

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1
Massachusetts Veterans Epidemiology and Research Information Center (MAVERIC), Boston VA Healthcare System, Boston, MA 02130, USA. catherine.rahilly@va.gov

Abstract

The authors examined the relationship between the magnitude of low-density lipoprotein cholesterol (LDL-C) reduction and the magnitude of cardiovascular risk reduction. From the Veterans Integrated Service Network 1 databases, the authors selected 54,611 patients with prevalent ischemic heart disease, peripheral vascular disease or diabetes mellitus, and >or=2 documented LDL-C levels who were followed between 1997 and 2006. The outcome was defined as acute myocardial infarction or revascularization. Preoutcome LDL-C reduction was categorized as follows: <10 mg/dL, reference; >or=10 but <40 mg/dL, small reduction; >or=40 but <70 mg/dL, moderate reduction; >or=70 mg/dL, large reduction. Proportional hazards were used to determine the hazard ratio for the outcome for each LDL-C reduction category compared with the reference. Results revealed a graded relationship between the magnitude of reduction in LDL-C and cardiovascular risk reduction. Stratified analyses demonstrated these findings to be robust regardless of initial LDL-C levels or whether patients achieved "target" final LDL-C values of <100 mg/dL.

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