Changing characteristics of statin-related cIMT trials from 1988 to 2006

Atherosclerosis
Michael H DavidsonAndrew M Tershakovec

Abstract

Changes in cIMT have not been consistently correlated with cardiovascular risk reduction in clinical studies. The variability of carotid intima media thickness (cIMT) changes in published statin LDL-C-lowering studies in relation to various baseline and study characteristics was assessed. This was an exploratory analysis of study-level data pooled from statin-treatment arms of 13 studies conducted during 1988-2006. Baseline mean common carotid artery (CCA)/cIMT, maximum mean CCA/cIMT and LDL-C levels, and annualized cIMT changes were estimated for the overall studies, those conducted before/after 2000, and in risk-based subgroups. Potential relationships between prespecified covariates and cIMT changes were assessed. Baseline mean CCA/cIMT and LDL-C levels were higher in the combined studies conducted before year 2000 (0.8521 mm) than after 2000 (0.7458 mm), and somewhat higher in study populations of patients with coronary heart disease risk and those with greater LDL-C reductions. Mean CCA/cIMT changes were also larger for the studies conducted before 2000 (-0.0119 mm/year) than after 2000 (-0.0013 mm/year). Notably, studies conducted before 2000 were of longer duration (≥ 2 years) than after 2000 (<2 years). Heterogeneity in...Continue Reading

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