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  • Title: Cost-effectiveness of Simvastatin plus Ezetimibe for Cardiovascular Prevention in CKD: Results of the Study of Heart and Renal Protection (SHARP).
    Author: Mihaylova B, Schlackow I, Herrington W, Lozano-Kühne J, Kent S, Emberson J, Reith C, Haynes R, Cass A, Craig J, Gray A, Collins R, Landray MJ, Baigent C, SHARP Collaborative Group.
    Journal: Am J Kidney Dis; 2016 Apr; 67(4):576-84. PubMed ID: 26597925.
    Abstract:
    BACKGROUND: Simvastatin, 20mg, plus ezetimibe, 10mg, daily (simvastatin plus ezetimibe) reduced major atherosclerotic events in patients with moderate to severe chronic kidney disease (CKD) in the Study of Heart and Renal Protection (SHARP), but its cost-effectiveness is unknown. STUDY DESIGN: Cost-effectiveness of simvastatin plus ezetimibe in SHARP, a randomized controlled trial. SETTING & POPULATION: 9,270 patients with CKD randomly assigned to simvastatin plus ezetimibe versus placebo; participants in categories by 5-year cardiovascular risk (low, <10%; medium, 10%-<20%; or high, ≥20%) and CKD stage (3, 4, 5 not on dialysis, or on dialysis therapy). MODEL, PERSPECTIVE, & TIMELINE: Assessment during SHARP follow-up from the UK perspective; long-term projections. INTERVENTION: Simvastatin plus ezetimibe (2015 UK £1.19 per day) during 4.9 years' median follow-up in SHARP; scenario analyses with high-intensity statin regimens (2015 UK £0.05-£1.06 per day). OUTCOMES: Additional health care costs per major atherosclerotic event avoided and per quality-adjusted life-year (QALY) gained. RESULTS: In SHARP, the proportional reductions per 1mmol/L of low-density lipoprotein (LDL) cholesterol reduction with simvastatin plus ezetimibe in all major atherosclerotic events of 20% (95% CI, 6%-32%) and in the costs of vascular hospital episodes of 17% (95% CI, 4%-28%) were similar across participant categories by cardiovascular risk and CKD stage. The 5-year reduction in major atherosclerotic events per 1,000 participants ranged from 10 in low-risk to 58 in high-risk patients and from 28 in CKD stage 3 to 36 in patients on dialysis therapy. The net cost per major atherosclerotic event avoided with simvastatin plus ezetimibe compared to no LDL-lowering regimen ranged from £157,060 in patients at low risk to £15,230 in those at high risk (£30,500-£39,600 per QALY); and from £47,280 in CKD stage 3 to £28,180 in patients on dialysis therapy (£13,000-£43,300 per QALY). In scenario analyses, generic high-intensity statin regimens were estimated to yield similar benefits at substantially lower cost. LIMITATIONS: High-intensity statin-alone regimens were not studied in SHARP. CONCLUSIONS: Simvastatin plus ezetimibe prevented atherosclerotic events in SHARP, but other less costly statin regimens are likely to be more cost-effective for reducing cardiovascular risk in CKD.
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