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LDL Cholesterol Reduction Following Ezetimibe Initiation (EZE-TRACK)

23. september 2026 oppdatert av: Universidade do Porto

Low-density Lipoprotein Cholesterol Reduction Following Ezetimibe Initiation: Patterns of Treatment Response

This clinical trial will study why some people have a larger drop in low-density lipoprotein cholesterol (LDL-C), known as "bad cholesterol," after starting ezetimibe. Ezetimibe is a medicine used to lower cholesterol when current treatment is not enough. Adults aged 18 to 75 years who need additional cholesterol treatment will take ezetimibe, either alone or added to their usual stable medication. Researchers will examine whether diet, salt intake, physical activity, and personal health factors influence how much LDL-C levels fall after treatment. Participants will have blood tests before and after starting ezetimibe, complete diet and activity questionnaires, and provide a 24-hour urine sample. The goal is to help doctors better understand who benefits most from ezetimibe and improve personalized cholesterol treatment.

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

Reduction of low-density lipoprotein cholesterol (LDL-C) is a central strategy for cardiovascular risk reduction. Although ezetimibe provides additional LDL-C lowering when added to background therapy, substantial interindividual variability in treatment response has been observed. Determinants of this variability, particularly modifiable lifestyle factors, remain insufficiently defined. This prospective, single-centre, open-label, pragmatic interventional study is conducted in routine clinical practice to identify baseline clinical and lifestyle predictors of lipid response following ezetimibe initiation. Adults with a clinical indication for ezetimibe will initiate treatment at the approved standard dose, either as monotherapy or added to stable background lipid-lowering therapy. Baseline assessments will include demographic and clinical characteristics, comorbidities, concomitant medications, and laboratory parameters. Dietary intake will be assessed using a validated food frequency questionnaire and objective 24-hour urinary measurements of sodium, potassium, and urea. Physical activity will be evaluated using a validated questionnaire. Lipid parameters will be reassessed after treatment initiation to determine percentage change in LDL-C, non-high-density lipoprotein cholesterol, and apolipoprotein B. Multivariable regression analyses will be performed to identify independent predictors of lipid response. The results may inform personalized lipid-lowering strategies and improve selection of patients most likely to benefit from ezetimibe therapy in real-world clinical settings.

Studietype

Intervensjonell

Registrering (Antatt)

100

Fase

  • Fase 4

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

      • Porto, Portugal, 4200-319
        • Rekruttering
        • Unidade Local de Saúde São João
        • Ta kontakt med:
        • Hovedetterforsker:
          • Pedro M. Marques, MD.

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 75 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion criteria:

  • Age ≥18 and ≤75 years at the time of ezetimibe initiation;
  • Initiation of ezetimibe as monotherapy or, in patients already treated with statins or other LDL-C-lowering agents, provided that neither the compound nor the dose of the concomitant LDL-C-lowering therapy was modified at the time of ezetimibe initiation.

Exclusion criteria:

  • Absence of indication for ezetimibe therapy as determined by the treating physician;
  • Initiation of ezetimibe with concomitant modification of statin or other LDL-C-lowering medication type or dosage;
  • Initiation of ezetimibe/statin combination therapy as the first lipid-lowering regimen.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Ezetimibe treatment

Participants will initiate ezetimibe therapy according to clinical indication, either as monotherapy or added to stable background lipid-lowering treatment without modification of concomitant drug type or dose. The study will assess lipid response and identify clinical and lifestyle predictors of LDL-C reduction following ezetimibe initiation.

Ezetimibe will be initiated at the approved standard dose of 10 mg once daily, either as monotherapy or added to stable background lipid-lowering therapy (e.g., statins) without modification of concomitant drug type or dosage at the time of initiation. Treatment will be prescribed according to routine clinical practice and guideline-based indications. Lipid profile and clinical parameters will be assessed before and after ezetimibe initiation to evaluate treatment response.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Percentage change in LDL-C following ezetimibe initiation
Tidsramme: At least 8 weeks after ezetimibe initiation.

Percentage change in LDL-C following ezetimibe initiation, calculated as [(follow-up LDL-C - baseline LDL-C) / baseline LDL-C] × 100 and expressed as a percentage (%).

At least 8 weeks after ezetimibe initiation.

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Percentage change in non-HDL-C following ezetimibe initiation
Tidsramme: At least 8 weeks after ezetimibe initiation.

Percentage change in non-HDL-C following ezetimibe initiation, calculated as [(follow-up non-HDL-C - baseline non-HDL-C) / baseline non-HDL-C] × 100 and expressed as a percentage (%).

At least 8 weeks after ezetimibe initiation.
Percentage change in apolipoprotein B (ApoB) following ezetimibe initiation
Tidsramme: At least 8 weeks after ezetimibe initiation.

Percentage change in ApoB following ezetimibe initiation, calculated as [(follow-up ApoB - baseline ApoB) / baseline ApoB] × 100 and expressed as a percentage (%).

At least 8 weeks after ezetimibe initiation.
Association between baseline 24-hour urinary sodium excretion and percentage change in LDL-C following ezetimibe initiation
Tidsramme: At least 8 weeks after ezetimibe initiation.

The association between baseline 24-hour urinary sodium excretion and percentage change in LDL-C following ezetimibe initiation will be evaluated using Spearman's rank correlation analysis. The outcome measure will be the Spearman correlation coefficient (ρ), which ranges from -1 to +1.

At least 8 weeks after ezetimibe initiation.
Proportion of participants achieving a clinically meaningful change in LDL-C following ezetimibe initiation
Tidsramme: At least 8 weeks after ezetimibe initiation.

Proportion of participants achieving a clinically meaningful LDL-C response, defined as at least a 20% decrease in LDL-C in participants treated with ezetimibe as monotherapy, or at least a 10% additional decrease in LDL-C when ezetimibe is added to high-intensity baseline statin therapy.

At least 8 weeks after ezetimibe initiation.
Performance of a multivariable prediction model for LDL-C response following ezetimibe initiation
Tidsramme: At least 8 weeks after ezetimibe initiation.

Performance of a multivariable prediction model developed to predict the percentage change in LDL-C following ezetimibe initiation. Model performance will be evaluated using discrimination (C-statistic / area under the ROC curve, range 0.5-1.0; higher values indicate better discrimination), calibration (calibration slope and calibration-in-the-large / intercept), and predictive accuracy (Brier score, range 0-1; lower values indicate better accuracy).

At least 8 weeks after ezetimibe initiation.

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

1. juni 2025

Primær fullføring (Antatt)

1. januar 2027

Studiet fullført (Antatt)

1. april 2027

Datoer for studieregistrering

Først innsendt

13. april 2026

Først innsendt som oppfylte QC-kriteriene

23. september 2026

Først lagt ut (Faktiske)

24. september 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

24. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

23. september 2026

Sist bekreftet

1. september 2026

Mer informasjon

Begreper knyttet til denne studien

Andre studie-ID-numre

  • EZE-TRACK

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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