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The Effect of Strawberries in a Cholesterol-Lowering Dietary Portfolio

7. maj 2007 opdateret af: University of Toronto

The Long-Term Effect of Viscous Fibers, Soy Protein, and Plant Sterol Foods in Combination on Serum Cholesterol and Other Risk Factors for Cardiovascular Disease

The purpose of this study is to determine whether addition of strawberries to a dietary portfolio of cholesterol-lowering foods will improve compliance and so increase the effectiveness of the dietary portfolio in lowering cholesterol and improving cardiovascular risk factors.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

We have shown in 1-month metabolic studies that the dietary portfolio can lower cholesterol to the same extent as first generation statins (cholesterol-lowering drugs). In the on-going long-term 'real world' study using this dietary portfolio, only one-third of participants were able to achieve similar cholesterol reductions at the end of 1 year. Varying compliance has been identified as the main issue why the other two-thirds could not achieve a similar level of reduction. We believe the addition of strawberries to this diet, by virtue of their beneficial components (fibre and antioxidants)and by replacement of less desirable foods (fatty deserts), may further improve the CHD risk profile of a very effective cholesterol reduction strategy.

Method:

454 g of strawberries per 2000 kcal per day will be provided for a one-month period to approximately 40-50 subjects on a long-term dietary portfolio study, all of whom have been on the diet for at least 6 months to 1 year. The active dietary components consist of viscous vibers (including oat bran), soy products (including soy milk), almonds and plant sterols (sterol enriched margarine). Strawberry recipes will be used to enhance compliance of these components. Subjects will undergo the study in a randomized crossover design where the control will be the dietary portfolio with additional 65 g oatbran bread (without psyllium) replacing the strawberries.

Bloods will be taken at weeks 0, 2 and 4 of each treatment period; and at one month prior to and after the 8-week study while on the long-term dietary portfolio.

Undersøgelsestype

Interventionel

Tilmelding

50

Fase

  • Fase 2

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Canada
    • Ontario
      • Toronto, Ontario, Canada, M5C 2T2
        • Clinical Nutrition & Risk Factor Modification Centre, St. Michael's Hospital Health Centre

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

21 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Healthy adult men and postmenopausal women currently enrolled in the long-term dietary portfolio study
  • Body mass index <32 kg/m2
  • constant body weight over last 6 months preceding the onset of the study
  • Fasting LDL cholesterol concentration>4.1 mmol/L at diagnosis

Exclusion Criteria:

  • women of child-bearing potential
  • major cardiovascular event (stroke or myocardial infarction)
  • positive molecular diagnosis of familial hypercholesterolemia
  • secondary causes of hypercholesterolemia (hypothyroidism, unless treated & on a stable dose of L-thyroxine, renal or liver disease)
  • use of cholesterol-lowering medications
  • serum triglycerides >4.5 mmmol/L
  • blood pressure > 145/90 mmHg
  • diabetes and or major disorders such as liver disease, renal failure or cancer
  • major surgery <6 months prior to randomization
  • alcohol consumption > 2 drinks per day

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Total cholesterol measured at weeks 0, 2, and 4 of each phase
LDL cholesterol measured at weeks 0, 2, and 4 of each phase
C-reactive protein measured at weeks 0, 2 and 4 of each phase
Blood pressure measured at weeks 0, 2 and 4 of each phase

Sekundære resultatmål

Resultatmål
Apolipoprotein A1 and B measured at weeks 0, 2, and 4 of each phase
Lp(a) measured at weeks 0, 2, and 4 of each phase
Oxidative stress measured at weeks 0, 2, and 4 of each phase
Strawberry intake measured at weeks 0, 2, and 4 of each phase
Compliance to portfolio diet components measured at weeks 0, 2 and 4 of each phase
24 hour urinary potassium measured at weeks 0 and 4 of each phase
24 hour urinary calcium measured at weeks 0 and 4 of each phase

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of Toronto

Samarbejdspartnere

Almond Board of California
Unilever R&D
Natural Sciences and Engineering Research Council, Canada
California Strawberry Commission

Efterforskere

  • Ledende efterforsker: David JA Jenkins, MD PhD DSc, Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, 150 College St. Rm 340, Toronto, ON M5S 3E2, Canada

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juni 2006

Studieafslutning (Faktiske)

1. februar 2007

Datoer for studieregistrering

Først indsendt

26. juni 2006

Først indsendt, der opfyldte QC-kriterier

26. juni 2006

Først opslået (Skøn)

28. juni 2006

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

8. maj 2007

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

7. maj 2007

Sidst verificeret

1. maj 2007

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • REB 03-043C
  • HC-CT#100934

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Hjerte-kar-sygdomme

Kliniske forsøg med strawberry dietary intervention

Søg i lignende forsøg

Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner