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Summary
We previously reported the results of a multicentre, randomised, double-blind, parallelgroup study comparing the efficacy and safety of cerivastatin 0.4 mg/day and cerivastatin
0.2 mg/day in patients with primary hypercholesterolaemia. Exploratory analysis in this study suggested a gender difference in the 0.4 mg group: mean low-density lipoprotein cholesterol (LDL-C) decreased by 44.4 ± 8.9% in women, compared with a mean decrease of 37.0 ± 0.9% in men (p < 0.046). This paper reports the results of further sub-analyses from this study. Overall in the per-protocol (PP) population, 71.5% (n = 73) of women taking cerivastatin 0.4 mg had an LDL-C decrease of > 40%, compared with 38.0% (n = 76) of men taking the same dose. In the cerivastatin 0.2 mg PP population, 34% (n = 17) of women had an LDL-C decrease of > 40%, compared with 19% (n = 18) of men. Mean LDL-C/HDL-C ratio decreased by 43% from baseline to the end of the study in the cerivastatin 0.4 mg PP group: –41.3% in males vs. –48.3% in females. In the cerivastatin 0.2 mg group, the decrease in LDL-C/HDL-C ratio from baseline to endpoint did not markedly differ between genders: –37.0% for males vs. –37.3% for females. Categorial analysis of the LDL-C/HDL-C ratio found that 90% of PP patients taking cerivastatin 0.4 mg, and 84% of PP patients taking cerivastatin 0.2 mg, had a low CHD risk (defined as a LDL-C/HDL-C ratio ≤ 3) after 8 weeks of treatment. The 6thand 95th percentiles of the distribution of LDL-C reduction from baseline revealed that 90% of PP patients taking cerivastatin 0.4 mg had an LDL-C reduction of between 22% and 56%. The mean LDL-C reduction for this 90% subset of patients was 40.1%. The same analysis for PP patients taking cerivastatin
0.2 mg found that 90% had an LDL-C reduction of between 13% and 49%. The mean LDL-C reduction in this 90% subset of patients was 31.5%. Of the patients taking cerivastatin 0.4 mg and valid for treatment according to National Cholesterol Education Program (NCEP) criteria, 71% (149/211) achieved NCEP targets for LDL-C at Week 16.
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