Effectiviteit van geleidelijk versus snel gewichtsverlies (GoLow)
Vergelijkende effectiviteit van een programma voor geleidelijk gewichtsverlies en een programma voor snel gewichtsverlies (inclusief een energiearm dieet) op 1 jaar gewichtsverlies bij proefpersonen met obesitas - een gerandomiseerde superioriteitsstudie met parallelle groepen. (De GoLow-studie).
This randomized controlled trial aims to compare the 1-year effectiveness of an initial rapid weight loss (RWL) program and a gradual weight loss (GWL) program.
Studie Overzicht
Toestand
Toestand
Conditie
Conditie
Interventie / Behandeling
Interventie / Behandeling
Gedetailleerde beschrijving
A total of at least 286 participants will be randomized to either a 16-week rapid weight loss (RWL) program; [an 8-week low-energy-diet (<1000 kcal/day) - followed by an 8-week gradual increase in energy intake (4 weeks <1300 kcal/day and 4 weeks <1500 kcal/day)], or a 16-week gradual weight loss (GWL) program (controls); [estimated total energy expenditure minus 800-1000 kcal/day]. Thereafter, all participants (both groups) will undergo a 36-week comprehensive weight maintenance program.
Studietype
Studietype
Inschrijving (Werkelijk)
Inschrijving
Fase
Fase
- Niet toepasbaar
Contacten en locaties
Studie Locaties
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Tønsberg, Noorwegen
- Vestfold Hospital Trust
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Deelname Criteria
Geschiktheidscriteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
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• Willing and able to give informed consent for participation in the study
- Living in the eastern part of Norway, mainly Oslo, Buskerud, Vestfold and Akershus
- Understanding Norwegian language written and spoken easily
- BMI ≥30.0 kg/m2
- Stable body weight (<5 kg self-reported weight change) during the last 3 months before inclusion
Exclusion Criteria:
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• Pregnancy and breast-feeding mothers
- Suspected non-compliance with regards to visits and/or diet
- Severe chronic disease (endocrine disease, heart disease, neurological disease, lung disease, disease in the gastrointestinal tract, kidney disease, rheumatism or cancer).
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Enkel
Aantal wapens
Wapens en interventies
Deelnemersgroep / ArmDeelnemersgroep / Arm |
Interventie / BehandelingInterventie / Behandeling |
|---|---|
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Actieve vergelijker: Rapid weight loss (RWL) program
16-week rapid weight loss (RWL) program [8-week LED (<1000 kcal/day) - followed by an 8-week gradual increase in energy intake (4 weeks <1300 kcal/day and 4 weeks <1500 kcal/day)] followed by a 36-weight loss maintenance program. |
16-week rapid weight loss (RWL) program (8-week low energy diet (LED) followed by 8-week gradual increased energy intake) and a subsequent 36-week weight-maintenance follow-up |
|
Actieve vergelijker: Gradual weight loss (GWL) program
16-week GWL-program (estimated total energy expenditure minus 800-1000 kcal/day) followed by a 36-weight loss maintenance program. |
16-week gradual weight loss (GWL) program (moderate calorie restriction) and a subsequent 36-week weight-maintenance follow-up |
Wat meet het onderzoek?
Primaire uitkomstmaten
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Change in body weight from baseline to 12 months
Tijdsspanne: Baseline to 1-year
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Percent total body weight loss (%TBWL) at 12 months follow-up |
Baseline to 1-year
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Secundaire uitkomstmaten
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Changes in anthropometric measures
Tijdsspanne: 4-month and 1-year
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Waist and hip circumference (cm) |
4-month and 1-year
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Changes in body composition 1
Tijdsspanne: 4-month and 1-year
|
Bioelectrical Impedance Analysis (BIA) |
4-month and 1-year
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Changes in body composition 2
Tijdsspanne: 4-month and 1-year
|
Dual-energy X-ray Absorptiometry (DXA) in selected participants |
4-month and 1-year
|
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Changes in lipids
Tijdsspanne: 4-month and 1-year
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Total-cholesterol, HDL-cholesterol, LDL-cholesterol and triglycerides (mmol/l) |
4-month and 1-year
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Changes in blood pressure
Tijdsspanne: 4-month and 1-year
|
Systolic and diastolic blood pressure (mm/Hg) |
4-month and 1-year
|
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Changes in glucose parameters
Tijdsspanne: 4-month and 1-year
|
HbA1c (mmol/mol) |
4-month and 1-year
|
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Changes in CRP
Tijdsspanne: 4-month and 1-year
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CRP (mg/L) |
4-month and 1-year
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Changes in Health Related Quality of Life 1
Tijdsspanne: 4-month and 1-year
|
Generic questionnaire: Short Form-36 Health Survey, SF36. Each item is scored on a 0 to 100 range so that the lowest and highest possible scores are 0 and 100, respectively. Scores for each of the 8 domains and summary scores for physical and mental health will be calculated |
4-month and 1-year
|
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Changes in Health Related Quality of Life 2
Tijdsspanne: 4-month and 1-year
|
Obesity specific questionnaire: IWQOL-lite. The IWQOL-Lite is a 31-item measure of weight-related quality of life. There are five domain scores (Physical Function, Self-Esteem, Sexual Life, Public Distress and Work) and a total score. Scores for all domains and total score range from 0-100, with lower scores indicating greater impairment. |
4-month and 1-year
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Changes in Health Related Quality of Life 3
Tijdsspanne: 4-month and 1-year
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Weight-related Symptom Measure (WRSM). The validated obesity specific WRSM measures 20 symptoms commonly related to being overweight or obese, including foot problems, joint pain, sensitivity to cold, shortness of breath, etc. using two different sets of items. The first set assesses whether or not a patient is experiencing specific symptoms, and the second set rates the level of the distress of the symptoms with values from zero ("not at all") to six ("bothers a very great deal"). The first set creates an additive scale summing symptoms from 0-20, while the second forms a symptom distress scale ranging from 0-120. |
4-month and 1-year
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Changes in symptoms of depression and anxiety
Tijdsspanne: 4-month and 1-year
|
Hospital Anxiety and Depression Scale (HADS). The validated generic HADS measures symptoms of anxiety and depression using 14 items scored from 0-3 It is decomposed into two domains measuring depression (HADS-D) and anxiety (HADS-A), both consisting of seven items yielding a score from 0-21. |
4-month and 1-year
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Changes in eating behavior
Tijdsspanne: 4-month and 1-year
|
The Three Factor Eating Questionnaire -R 21 (TFEQ-R21) measures eating behaviour and has been validated for use in individuals with obesity and will be used in the study. It consists of 21 items comprising three domain scores; (1) uncontrolled eating; assessing the tendency to lose control over eating when feeling hungry or when exposed to external stimuli, (2) cognitive restraint; assessing the conscious restriction of food intake to control body weight or body shape, and (3) emotional eating; assessing overeating related to negative mood states. The domain scores were transformed to 0-100 scales to facilitate comparison; a higher score indicates more uncontrolled, restraint, or emotional eating. |
4-month and 1-year
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Change in weight from baseline to 4 months
Tijdsspanne: 4-month
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Percent total body weight loss (%TBWL) at 4 months follow-up |
4-month
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Proportions of participants with a TBWL of ≥ 5%, ≥10% and ≥15% at 52-week
Tijdsspanne: 1-year
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TBWL of ≥ 5%, ≥10% and ≥15% at 52-week follow-up |
1-year
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Medewerkers en onderzoekers
Sponsor
Sponsor
Medewerkers
Medewerkers
Onderzoekers
Onderzoekers
- Hoofdonderzoeker: Jøran Hjelmesæth, Professor, The Hospital of Vestfold
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Studie start
Primaire voltooiing (Werkelijk)
Primaire voltooiing
Studie voltooiing (Werkelijk)
Studie voltooiing
Studieregistratiedata
Eerst ingediend
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Eerst geplaatst
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update geplaatst
Laatste update ingediend die voldeed aan QC-criteria
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
Andere studie-ID-nummers
- GoLow
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
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