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The Effect of High Protein Diets on Weight Loss and Lean Muscle Mass in Patients Awaiting Bariatric Surgery

26. oktober 2017 opdateret af: Andrew MacCormick, University of Auckland, New Zealand
All patients in CMDHB eligible for bariatric surgery are given a weight loss goal prior to surgery. It is unknown what the most effective diet is to lose weight, while still preserving muscle mass. The diet must also be acceptable and adhered to by patients. The aim of this study is to find out if a diet that is higher in protein and lower in carbohydrate than the standard Ministry of Health guidelines will have a greater effect on weight loss, preservation of lean muscle mass, surgical recovery score, adherence and acceptability.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This pilot project is a randomised control trial with 24 participants. Diets will consist of 1200 and 1500kcals for females and males, respectively. The control arm is to receive the Ministry of Health guidelines percentage energy from carbohydrate (50-55%), protein (10-15%) and fat (30%). The intervention arm is to be lower in carbohydrate (40%), higher in protein (30%), moderate fat (30%). Participants will be required to continue the diet for at least 8 weeks while waiting for surgery. At baseline and at eight weeks their weight, hip circumference, waist circumference, neck circumference and body composition measurements will be taken. During their prescribed diet they are required to fill out a 3-day diet record. At the end of eight weeks the participants will perform a twenty-four hour urine collect for urea and creatinine. This will help determine adherence. Post-surgery (21-28 days) they will be required to complete a surgical recovery questionnaire and the above measurements will be recorded again. These data will be collected over a period beginning January 2015. It is expected that the intervention arm will have greater weight loss and better preservation of muscle mass leading to a better surgical recovery score. However because the intervention requires a higher intake of protein this may have an effect on adherence and acceptability in these participants. There are no known adverse effects of the intervention diet in the short term.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

20

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • New Zealand
      • Auckland, New Zealand
        • Counties Manukau District Health Board

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

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Participants in this study will be patients eligible for bariatric surgery under CMDHB. These participants must have a BMI greater than 35kg/m2 with co-morbidities or a BMI greater than 40kg/m2.

Exclusion Criteria:

  • Patients will be excluded from study if they do not attend surgeon or dietitian appointments. To be included in this study patients must be English speaking and weigh under 200kg.

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: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Ingen indgriben: Control Standard Protein Diet
Control Arm Ministry of Health guidelines percentage energy from carbohydrate (50-55%), protein (10-15%) and fat (30%).
Eksperimentel: Intervention High Protein Diet
Intervention Arm Percentage energy from carbohydrate (40%), protein (30%) and fat (30%).
Andet: High protein diet
The intervention diet is higher in protein than the control diet.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Weight
Tidsramme: After 8-weeks of diet and 21-28 days post bariatric surgery
Scales
After 8-weeks of diet and 21-28 days post bariatric surgery
Change in Total body muscle mass
Tidsramme: After 8-weeks of diet and 21-28 days post bariatric surgery
Biometric scales
After 8-weeks of diet and 21-28 days post bariatric surgery

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Surgical recovery score
Tidsramme: Surgical recovery score 21-28 days post surgery
SRS tool
Surgical recovery score 21-28 days post surgery
compliance
Tidsramme: 8 weeks
urinary creatinine
8 weeks

Samarbejdspartnere og efterforskere

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

Sponsor

University of Auckland, New Zealand

Samarbejdspartnere

Counties Manukau Health

Efterforskere

  • Ledende efterforsker: Andrew D MacCormick, FRACS, University of Auckland, New Zealand

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. maj 2015

Primær færdiggørelse (Faktiske)

1. august 2016

Studieafslutning (Faktiske)

1. august 2016

Datoer for studieregistrering

Først indsendt

26. maj 2015

Først indsendt, der opfyldte QC-kriterier

11. december 2015

Først opslået (Skøn)

16. december 2015

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

27. oktober 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

26. oktober 2017

Sidst verificeret

1. oktober 2017

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • Highproteinbariatric

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 .

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Betingelser

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Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner