Intensive Lipid-Lowering Therapy for Slowing Progression as Well as Inducing Regression of Atherosclerosis in Japanese Patients:Subanalysis of the JART Study

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This paper describes a subanalysis of the JART Study comparing rosuvastatin and pravastatin treatment. A total of 314 subjects were analyzed in this subanalysis, 282 of whom were eligible for evaluation of the relationship between LDL-C and carotid mean-IMT change. In the subanalysis, we evaluated the extent to which intensive lipid-lowering therapy slowed the mean-IMT progression by a correlation analysis between LDL-C and mean-IMT change after 12 months of statin treatment. Nearly half were male (49.4%) and elderly (49.7%). The majority (84.4%) were treated for primary prevention. Patients with hypertension and diabetes mellitus accounted for 65.3% and 44.0%, respectively. At the 12-month measurement point, mean-IMT change was correlated with LDL-C (<I>R</I> = 0.187; <I>P</I> = 0.0016), LDL-C/ HDL-C ratio (<I>R</I> = 0.152; <I>P</I> = 0.0105), and non-HDL-C (<I>R</I> = 0.132; <I>P</I> = 0.0259). Mean-IMT after 12 months was divided into 4 subgroups by LDL-C at 12 months; < 80, ≥ 80 to < 100, ≥ 100 to < 120, and ≥ 120 mg/dL. A trend analysis using the Jonckheere–Terpstra test showed statistical signifi cance (<I>P</I> = 0.0002). Even for prevention in Japanese patients who have lower risk of atherosclerotic disease than Western patients, lowering the LDL-C level to below the therapeutic target prevented mean-IMT progression after 12 months more strongly. These findings suggest that more intensive control of LDL-C to levels lower than those in current JAS guidelines should be required to achieve slowing of progression as well as induction of regression of atherosclerosis.

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