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Effects of Daily Walnut Intake Among the Subjects With Metabolic Syndrome

28. august 2017 opdateret af: ICAN Nutrition Education and Research

Effects of Daily Walnut Intake Among the Subjects With Metabolic Syndrome in South Korea

Investigators planed to conduct a randomized, controlled, crossover trial to examine the effects of daily walnuts intake among Korean subjects with metabolic syndrome. Primary objective of this study was to investigate the effects of daily walnut intake on changes of metabolic syndrome indices in Koreans with metabolic syndrome age over 30 years old. This study was consisted of four periods: run-in, first intervention, wash-out, and second intervention phases. As 16 weeks of first intervention period began after the run-in phase, the subjects were randomly assigned into one of two groups: walnut group and control group. Participants in walnut group consumed 45 grams of walnuts on a daily basis and participants in control group were provided iso-caloric white bread for first 16 weeks. After the first intervention and wash-out period (6 weeks), second intervention which is crossover of first intervention was started during the next 16 weeks. Anthropometric measurements and biochemical analyses were done at the beginning and the end of each intervention (0, 16, 22, and 38 weeks of trial). Habitual diet was randomly observed using 3-day diet record once during each phase.

Investigators expected to evaluate 1)effects of walnut ingestion on reverting metabolic syndrome to normal status especially by reducing waist circumference and improving serum levels of triglyceride and high-density lipoprotein, 2)beneficial effects of daily walnut consumption on changes of body composition in the subjects with metabolic syndrome, and 3)regulatory effects of daily walnut intake on inflammatory markers and diabetic markers.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

119

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Korea, Republikken
      • Seoul, Korea, Republikken, 07327
        • ICAN Nutrition Education and Research

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

30 år til 55 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria: at least three out of five metabolic syndrome components

  • waist circumference (WC) >90 cm for men and >80 cm for women
  • hypertension (DBP ≥85 and <110 mm Hg)
  • hyperglycemia (≥100 mg/dL)
  • elevated plasma TG concentrations (≥150 mg/dL)
  • decreased plasma HDL-C concentrations (<40 mg/dL for men and <50 mg/dL for women)

Exclusion Criteria:

  • the presence of morbid obesity (BMI ≥40)
  • the use of any medication for the control of blood pressure, glucose, or lipid metabolism
  • a medical history of hypocaloric diet consumption within the past year
  • gastrointestinal tract disorders
  • post-menopausal women
  • smokers

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: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Walnut-Control
Andet: food
45 g of walnut / iso-caloric white bread
Eksperimentel: Control-Walnut
Andet: food
45 g of walnut / iso-caloric white bread

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
changes of waist circumference
Tidsramme: after 16 weeks of daily walnut consumption
Waist circumferences (cm) were obtained at the midpoint between the lowest rib and the iliac crest and rounded to the nearest 0.1 cm after inhalation and exhalation.
after 16 weeks of daily walnut consumption
changes of blood triglyceride level
Tidsramme: after 16 weeks of daily walnut consumption
Serum triglycerides (mg/dL) levels were measured by an enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption
changes of blood high-density lipoprotein cholesterol levels
Tidsramme: after 16 weeks of daily walnut consumption
High density lipoprotein cholesterol (mg/dL) levels were determined by a homogeneous enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption
changes of blood pressure
Tidsramme: after 16 weeks of daily walnut consumption
Blood pressure (mmHg) was measured on the right arm using an up-load blood pressure monitor with participants in a comfortably seated position after at least a 5-minute rest.
after 16 weeks of daily walnut consumption
changes of blood glucose level
Tidsramme: after 16 weeks of daily walnut consumption
Blood glucose levels (mg/dL) were measured using blood glucose monitor and test stripts from the finger tip.
after 16 weeks of daily walnut consumption

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
changes of total cholesterol level
Tidsramme: after 16 weeks of daily walnut consumption
Serum total cholesterol levels (ml/dL) were measured by an enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption
changes of serum apolipoprotein B level
Tidsramme: after 16 weeks of daily walnut consumption
Serum apolipoprotein B (ml/dL) was measured using a turbidimetric immunoassay.
after 16 weeks of daily walnut consumption
changes of serum adiponectin level
Tidsramme: after 16 weeks of daily walnut consumption
Blood adiponectin (ug/mL) levels were measured using ELISA.
after 16 weeks of daily walnut consumption
changes of serum leptin level
Tidsramme: after 16 weeks of daily walnut consumption
Blood leptin (ug/mL) levels were measured using ELISA.
after 16 weeks of daily walnut consumption
changes of serum insulin level
Tidsramme: after 16 weeks of daily walnut consumption
Serum insulin (μU/mL) was measured with a commercially available kit, the ultrasensitive insulin ELISA kit using an Epoch microplate spectrophotometer.
after 16 weeks of daily walnut consumption
changes of low-density lipoprotein cholesterol level
Tidsramme: after 16 weeks of daily walnut consumption
Low-density lipoprotein cholesterol levels (ml/dL) were determined by a homogeneous enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption

Samarbejdspartnere og efterforskere

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

Sponsor

ICAN Nutrition Education and Research

Samarbejdspartnere

California Walnut Commission

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

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 (Faktiske)

1. maj 2015

Primær færdiggørelse (Faktiske)

30. juli 2017

Studieafslutning (Faktiske)

30. juli 2017

Datoer for studieregistrering

Først indsendt

14. august 2017

Først indsendt, der opfyldte QC-kriterier

28. august 2017

Først opslået (Faktiske)

30. august 2017

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

30. august 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

28. august 2017

Sidst verificeret

1. august 2017

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • CWC-2016-MetS

Plan for individuelle deltagerdata (IPD)

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