Cited by 1Fatty Acid Research and HealthLipoproteins and Cardiovascular HealthChronic Kidney Disease and Diabetes

Icosapent ethyl reduces CVD risk in cardiovascular-kidney-metabolic syndrome: REDUCE-IT CKM

Open access
Miller, Michael, Bhatt, Deepak L., Brinton, Eliot A., Jacobson, Terry A., Steg, Ph. Gabriel, Ketchum, Steven B., Pineda, Armando Lira, Tardif, Jean-Claude +1 more·2026·American Journal of Preventive Cardiology

Abstract

Background/Introduction: Cardiovascular-kidney-metabolic (CKM) syndrome was recently identified as a cardiometabolic disorder that incorporates chronic kidney disease with the metabolic syndrome (MetS). REDUCE-IT (Reduction of Cardiovascular Events with Icosapent Ethyl-Intervention Trial) was an international, double-blind, placebo-controlled trial that randomized hypertriglyceridemic (TG, 150-499 mg/dL) statin-treated patients with established cardiovascular disease (CVD) or diabetes and multiple CVD risk factors to icosapent ethyl (IPE) or placebo (4 grams/day). It is unknown if renal insufficiency added to MetS confers incremental CVD risk in secondary prevention patients without diabetes and if IPE lowers that risk. Methods: (n=609). Event rates of the primary and secondary trial endpoints were compared in placebo subjects with higher vs lower baseline eGFR, and the effect of IPE on these endpoints was also compared within each of the three subgroups. Results: ). Treatment with IPE was associated with an absolute risk reduction of 11.2% and number needed to treat of 9 patients to prevent an initial primary composite endpoint event over the study period. Conclusions: In this REDUCE-IT analysis of secondary prevention patients without diabetes at baseline, the recently defined CKM syndrome was associated with incremental CVD risk compared with MetS and normal renal function. Treatment with IPE substantially reduced CVD risk in MetS patients with renal insufficiency (i.e., CKM) and CVD.

AI snapshot

Written from the paper’s full text.

TL;DR

In a post hoc REDUCE-IT analysis of secondary prevention patients with metabolic syndrome but without diabetes, adding renal insufficiency (CKM syndrome) was associated with higher cardiovascular risk than metabolic syndrome with normal kidney function. Icosapent ethyl substantially reduced primary and key secondary composite endpoints, especially in patients with eGFR <60 mL/min/1.73 m².

Key findings

  • Among placebo-treated patients, CKM was associated with increased primary composite endpoint risk at eGFR <90 mL/min/1.73 m² (HR 1.44 [95% CI 1.05–1.96]; P=0.02) and at eGFR <60 mL/min/1.73 m² (HR 1.87 [95% CI 1.31–2.69]; P=0.0005) versus eGFR ≥90 mL/min/1.73 m².
  • In patients with eGFR <60 mL/min/1.73 m², icosapent ethyl versus placebo reduced the primary composite endpoint (HR 0.55 [95% CI 0.38–0.78]; P=0.0009) and key secondary composite endpoint (HR 0.52 [95% CI 0.35–0.79]; P=0.002).
  • In that eGFR <60 subgroup, icosapent ethyl was associated with an absolute risk reduction of 11.2% and number needed to treat of 9 to prevent an initial primary composite endpoint event over the study period.
  • Icosapent ethyl also reduced the primary endpoint at eGFR ≥60 to <90 mL/min/1.73 m² (HR 0.79 [95% CI 0.63–0.98]; P=0.02), with a non-significant interaction P=0.22 across eGFR groups.

Methods

  • Post hoc analysis of REDUCE-IT, an international, double-blind, placebo-controlled trial of statin-treated hypertriglyceridemic patients randomized to icosapent ethyl 4 g/day or mineral oil placebo; this analysis included secondary prevention patients with metabolic syndrome but without diabetes at baseline (n=2860).
  • Patients were stratified by baseline eGFR: <60 (n=565), ≥60 to <90 (n=1686), and ≥90 mL/min/1.73 m² (n=609).
  • Outcomes used Kaplan–Meier analysis and stratified Cox proportional hazards models, with total events analyzed by negative binomial regression; P-values were nominal and exploratory with no adjustment for multiple comparisons.

Limitations

  • The paper states this was a post hoc analysis because CKM was not defined until 2023, after REDUCE-IT was completed and published; the reductions and favorable NNT are therefore hypothesis generating and require confirmation.
  • The paper states statistical limitations from using multiple exploratory post hoc data cuts to define reduced kidney function, with analyses intended as exploratory and hypothesis generating across eGFR values.
  • Evident from the text: the work was supported by Amarin Corporation, and multiple authors report financial relationships with Amarin and other industry entities; adverse event signals such as bleeding TEAEs trending higher with icosapent ethyl in lower eGFR subgroups and numerically higher atrial fibrillation/flutter were reported but not framed as limitations.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.ajpc.2025.101387

Cites

29 of 29 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

8 of 12 cited sources checked · 5 supported · 1 flagged · accuracy not yet measured

  • Interpretationown data

    The current study supports IPE as a potential therapeutic strategy for CKM patients beyond traditional standard of care measures.

    “As such, the current study supports IPE as a potential therapeutic strategy for CKM patients beyond traditional standard of care measures as outlined in the recent AHA Scientific Statement [3]”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [3] Ndumele, 2023 source
  • Premisecitation

    IPE reduced TG, a prominent biomarker of CVD risk.

    “IPE, a highly purified and prescription form of eicosapentaenoic acid (EPA), reduced TG, a prominent biomarker of CVD risk [13]”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [13] Miller, 2011 source

      Section 3.4 (page unavailable) describes triglycerides as a biomarker of cardiovascular risk, and Section 13.6 says EPA may reduce triglyceride levels. The paper does not establish that the specific prescription formulation IPE reduced triglycerides; its EPA discussion is broader and more qualified. (LLM, conf=0.86)

      Experimental — accuracy not yet measured
  • Interpretationcitation

    The trends observed in the prespecified REDUCE-IT MetS analysis are consistent with results identified for primary and key secondary composite endpoints.

    “Overall, the trends observed in the prespecified REDUCE-IT MetS analysis [7] are consistent with results identified for primary and key secondary composite endpoints.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [7] Miller, 2023, Effectiveness of icosapent ethyl on first and total cardiovascular events in patients with metabolic syndrome, but without diabetes: REDUCE-IT MetSyn, Eur Heart J Open source
  • Findingown data

    In patients with CKM (eGFR <60 mL/min/1.73 m2) adjusted for age and sex, treatment with IPE compared with placebo was associated with significant reduction in the primary composite endpoint, HR 0.55 (95% CI 0.38-0.78), P=0.0009.

    “In patients with CKM (eGFR < 60 mL/min/1.73 m2) adjusted for age and sex, treatment with IPE compared with placebo was associated with significant reductions in the primary composite endpoint (HR, 0.55 [95% CI, 0.38, 0.78]; P=0.0009)”
    • Also stated in: § Clinical outcomes · plain
      “IPE treatment vs placebo was associated with reduction in the primary endpoint at eGFR < 60 mL/min/1.73 m2 (HR, 0.55 [95 % CI, 0.38, 0.78]; P = 0.0009)”
    Quote in the paperSubstantial claim
  • Findingown data

    In the same population, IPE treatment was associated with a 47% reduction in the key secondary composite endpoint at eGFR <60 mL/min/1.73 m2, HR 0.53 (95% CI 0.35-0.81), P=0.002.

    “Use of IPE was also associated with 47 % reduction in the key secondary composite endpoint (HR, 0.53 [95 % CI, 0.35, 0.81]; P = 0.002)”
    Quote in the paperSubstantial claim
  • May combine two claims. 6
  • Classified as probably not a substantial claim. 9
  • May combine two claims.

    Premisecitation

    CVD event rates in REDUCE-IT were neither influenced by baseline TG levels nor by on-treatment TG levels <150 mg/dL.

    “and CVD event rates were neither influenced by baseline TG levels nor by on-treatment TG levels < 150 mg/dL [14].”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [14] Bhatt, 2019, REDUCE-IT investigators. Reduction in first and total ischemic events with icosapent ethyl across baseline triglyceride tertiles, J Am Coll Cardiol source

      In the main text (pp. 1159–61), the paper says placebo event rates were highest in the upper baseline triglyceride tertile, contrary to the claim that event rates were not influenced by baseline levels. It reports broadly consistent *relative reductions with icosapent ethyl* across tertiles, which is different from saying event rates did not vary. The paper does not assess event rates by on-treatment triglycerides below 150 mg/dL. (LLM, conf=0.82)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing). May combine two claims.

    Interpretationcitation

    Cardioprotective properties of EPA that offset inflammation and oxidative stress while improving endothelial function may have been operative in this high-risk phenotype.

    “Although the study was not designed to examine mechanism(s) underlying CVD risk reduction in CKM, cardioprotective properties of EPA that offset inflammation and oxidative stress while improving endothelial function may have been operative in this high-risk phenotype [[15], [16], [17], [18]].”
    Quote in the paperNot a substantial claim2 of 3 sources checked
    • cites [15] Mason, 2020, Emerging mechanisms of cardiovascular protection for the omega-3 fatty acid eicosapentaenoic acid, Arter Thromb Vasc Biol source
    • cites [16] Lin, 2022, Metabolic syndrome-related kidney injury: a review and update, Front Endocrinol (Lausanne) source

      Section 6.6 discusses anti-inflammatory effects and endothelial function, but attributes them to pycnogenol, not EPA. Searches of our copy for EPA, eicosapentaenoic acid, and omega-3 fatty acids found no passage addressing the claimed EPA mechanisms or their possible role in this high-risk phenotype. (LLM, conf=0.75)

      Experimental — accuracy not yet measured
    • cites [17] Scurt, 2024, Association of metabolic syndrome and chronic kidney disease, Obes Rev source
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductcitation

    REDUCE-IT was a randomized, double-blind, placebo-controlled trial.

    “REDUCE-IT was a randomized double-blind and placebo-controlled phase 3b trial”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [8] Bhatt, 2019, REDUCE-IT investigators. Cardiovascular risk reduction with icosapent ethyl for hypertriglyceridemia, N Engl J Med source
    • cites [9] Bhatt, 2017, REDUCE-IT investigators. Rationale and design of REDUCE-IT: reduction of cardiovascular events with icosapent ethyl-intervention trial, Clin Cardiol source
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Elevated TG is associated with an increased likelihood of major adverse CVD events.

    “as well as an increased likelihood of major adverse CVD events associated with elevated TG [12]”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [12] Ambrosy, 2021, Triglyceride levels and residual risk of atherosclerotic cardiovascular disease events and death in adults receiving statin therapy for primary or secondary prevention: insights from the KP REACH study, J Am Heart Assoc source
  • May combine two claims.

    Findingown data

    In patients with CKM (eGFR <60 mL/min/1.73 m2), IPE treatment was associated with an absolute risk reduction of 11.2% and number needed to treat of 9 to prevent an initial primary composite endpoint event over the study period.

    “Treatment with IPE was associated with an absolute risk reduction of 11.2% and number needed to treat of 9 patients to prevent an initial primary composite endpoint event over the study period.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Study sites were approved by their respective institutional review board or ethics committee.

    “study sites were approved by their respective institutional review board or ethics committee.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    IPE has the potential to redefine secondary preventive strategies in this high-risk cohort.

    “In view of the associated reduction in cardiovascular events with CKM, despite standard of care therapies, IPE has the potential to redefine secondary preventive strategies in this high-risk cohort.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Pre-existing CVD is associated with a heightened risk of CVD events.

    “Previous studies have demonstrated a heightened risk of CVD events with pre-existing CVD [11]”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [11] Bhatt, 2010, Steg PG; REACH Registry Investigators. Comparative determinants of 4-year cardiovascular event rates in stable outpatients at risk of or with atherothrombosis, JAMA source
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    P-values presented are nominal and exploratory with no adjustment for multiple comparisons.

    “P-values presented are nominal and exploratory with no adjustment for multiple comparisons.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    Efficacy analyses were undertaken using the intention-to-treat (ITT) approach.

    “Efficacy analyses were undertaken using the intention-to-treat (ITT) approach”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    The sizeable reductions in the primary endpoint and favorable NNT associated with IPE use are hypothesis generating and require confirmation with additional testing.

    “Consequently, the sizeable reductions in the primary endpoint and favorable NNT associated with IPE use are hypothesis generating that would require confirmation with additional testing.”
    Quote in the paperSubstantial claim
11 of 11
  • The paper relies on this without support.

    The incremental effect of CKD on CVD risk beyond MetS is not well studied.

    “However, as CKM syndrome inevitably captures a higher risk population than MetS alone, the incremental effect of CKD on CVD risk beyond MetS is not well studied.”
1 of 1

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. Ndumele, 2023, 148, 1636
  2. Miller, 2011, 123, 2292

Cited by

Sorted by citations

Authors
Miller, M., Bhatt, D. L., Brinton, E. A., Jacobson, T. A., Steg, P. G., Ketchum, S. B., Pineda, A. L., Tardif, J.-C., & Ballantyne, C. M.
Affiliations
  • Hospital of the University of Pennsylvania (US)
  • Icahn School of Medicine at Mount Sinai (US)
  • Emory University (US)
  • Amarin (United States) (US)
  • Montreal Heart Institute (CA)
  • Baylor College of Medicine (US)
Venue
American Journal of Preventive Cardiology
Publisher
Elsevier BV
Published
2026-02
Volume
25
Pages
101387
ISSN
2666-6677 (ISSN-L)
OpenAlex
W4417488461
Cited by
0
References
23
FWCI
0.00
Type
journal article
Language
en
Open access
Locations
  • American Journal of Preventive Cardiology (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Digital Commons-TMC (Texas Medical Center) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • PubMed Central (submittedVersion, cc-by-nc-nd)
Funders
Amarin Corporation
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Health Sciences › Medicine › Nephrology › Chronic Kidney Disease and Diabetes
Keywords
icosapent ethyl, cardiovascular-kidney-metabolic syndrome, chronic kidney disease, metabolic syndrome, hypertriglyceridemia, secondary prevention, cardiovascular risk reduction, renal failure, EGFR, REDUCE-IT trial, omega-3 fatty acids

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