Trial reportInternational journal of obesity (2005)2017
Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a 1-year randomized controlled trial?
Trial report in International journal of obesity (2005), 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
17 citing papers in PubMed, 2 syntheses or guidelines pooled it, 39 citations in OpenAlex.
- Impact of Portion Control Tools on Portion Size Awareness, Choice and Intake: Systematic Review and Meta-Analysis.Nutrients · 2021Pooled it
- A systematic review and meta-analysis of the effectiveness of meal replacements for weight loss.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2019Pooled it
- Which strategies to manage problem foods were related to weight loss in a randomized clinical trial?Appetite · 2020Trial
- Trial
- "The Big Three" properties of food that drive intake.Physiology & behavior · 2025Review
- Obesity medicine provider-directed health coaching in a commercial weight loss program: Proof of concept.Obesity pillars · 2024Article
- Evidence-Based Eating Patterns and Behavior Changes to Limit Excessive Gestational Weight Gain: A Scoping Review.International journal of environmental research and public health · 2023Article
- Is Type 2 Diabetes Mellitus a Behavioural Disorder? An Evidence Review for Type 2 Diabetes Mellitus Prevention and Remission through Lifestyle Modification.TouchREVIEWS in endocrinology · 2023Review
- Rationale and development of a manualised dietetic intervention for adults undergoing psychological treatment for an eating disorder.Eating and weight disorders : EWD · 2021Article
- Health, pleasure, and fullness: changing mindset affects brain responses and portion size selection in adults with overweight and obesity.International journal of obesity (2005) · 2020Article
- Perceptions of a large amount of food based on binge-eating disorder diagnosis.The International journal of eating disorders · 2019Article
- Exploring the Experiences of People with Obesity Using Portion Control Tools-A Qualitative Study.Nutrients · 2019Article
- Potential moderators of the portion size effect.Physiology & behavior · 2019Review
- Validation of the Diet Satisfaction Questionnaire: a new measure of satisfaction with diets for weight management.Obesity science & practice · 2018Article
- Early predictors of weight loss in a 1-year behavioural weight-loss programme.Obesity science & practice · 2018Article
- Dietary Management of Obesity: Cornerstones of Healthy Eating Patterns.The Medical clinics of North America · 2018Review
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
BACKGROUND/
objectivesControlling food portion sizes can help reduce energy intake, but the effect of different portion-control methods on weight management is not known. In a 1-year randomized trial, we tested whether the efficacy of a behavioral weight-loss program was improved by incorporating either of the two portion-control strategies instead of standard advice about eating less. SUBJECTS/
methodsThe Portion-Control Strategies Trial included 186 women with obesity (81%) or overweight (19%). Participants were randomly assigned to one of three equally intensive behavioral programs, consisting of 19 individual sessions over 12 months. The Standard Advice Group was instructed to eat less food while making healthy choices, the Portion Selection Group was instructed to choose portions based on the energy density using tools such as food scales and the Pre-portioned Foods Group was instructed to structure meals around pre-portioned foods such as single-serving main dishes, for which some vouchers were provided. In an intention-to-treat analysis, a mixed-effects model compared weight loss trajectories across 23 measurements; at month 12, weight was measured for 151 participants (81%).
resultsThe trajectories showed that the Pre-portioned Foods Group initially lost weight at a greater rate than the other two groups (P=0.021), but subsequently regained weight at a greater rate (P=0.0005). As a result, weight loss did not differ significantly across groups at month 6 (mean±s.e. 5.2±0.4 kg) or month 12 (4.5±0.5 kg). After 1 year, measured weight loss averaged 6% of baseline weight. The frequency of using portion-control strategies initially differed across groups, then declined over time and converged at months 6 and 12.
conclusionsIncorporating instruction on portion-control strategies within a 1-year behavioral program did not lead to a greater weight loss than standard advice. Using pre-portioned foods enhanced early weight loss, but this was not sustained over time. Long-term maintenance of behavioral strategies to manage portions remains a challenge.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.