Baseline serum sitosterol level as predictor of adverse clinical events in acute coronary syndrome patients with dyslipidaemia: A sub-analysis of HIJ-PROPER

Atherosclerosis
Junichi YamaguchiNobuhisa Hagiwara

Abstract

We aimed to examine the effect of serum sitosterol, a cholesterol absorption marker, on clinical outcomes in acute coronary syndrome patients with dyslipidaemia. This is a sub-analysis of the HIJ-PROPER trial that assesses the effect of aggressive low-density lipoprotein cholesterol (LDL-C) lowering treatment with pitavastatin + ezetimibe in 1734 acute coronary syndrome (ACS) patients with dyslipidaemia. Patients were divided into two groups based on sitosterol level at enrolment (cut-off value was 2.2 μg/mL; a median of baseline sitosterol level), and clinical outcomes were examined. The mean LDL-C level after 3 years in the low sitosterol group was 84.8 ± 20.1 mg/dL with pitavastatin-monotherapy and 64.6 ± 20.3 mg/dL with pitavastatin + ezetimibe, while corresponding values in the high sitosterol group were 91.0 ± 22.9 mg/dL and 71.1 ± 23.3 mg/dL, respectively. In the high sitosterol group, the Kaplan-Meier event rate for the primary endpoint at 3 years was 26.0% in the pitavastatin + ezetimibe group, as compared with 34.3% in the pitavastatin-monotherapy group (hazard ratio, 0.71; 95% confidence interval, 0.56-0.91; p = 0.006, p-value for interaction = 0.010). However, in the low sitosterol group, there was no significant re...Continue Reading

Citations

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