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Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?

BACKGROUND/OBJECTIVES: Controlling food portion sizes can help reduce energy intake, but the effect of different portion-control methods on weight management is not known. In a one-year randomized trial, we tested whether the efficacy of a behavioral weight-loss program was improved by incorporating...

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Autores principales: Rolls, Barbara J., Roe, Liane S., James, Brittany L., Sanchez, Christine E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5340595/
https://www.ncbi.nlm.nih.gov/pubmed/27899807
http://dx.doi.org/10.1038/ijo.2016.217
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author Rolls, Barbara J.
Roe, Liane S.
James, Brittany L.
Sanchez, Christine E.
author_facet Rolls, Barbara J.
Roe, Liane S.
James, Brittany L.
Sanchez, Christine E.
author_sort Rolls, Barbara J.
collection PubMed
description BACKGROUND/OBJECTIVES: Controlling food portion sizes can help reduce energy intake, but the effect of different portion-control methods on weight management is not known. In a one-year randomized trial, we tested whether the efficacy of a behavioral weight-loss program was improved by incorporating either of two portion-control strategies instead of standard advice about eating less. SUBJECTS/METHODS: The 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 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%). RESULTS: The 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±SE 5.2±0.4 kg) or Month 12 (4.5±0.5 kg). After one 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. CONCLUSIONS: Incorporating instruction on portion-control strategies within a one-year behavioral program did not lead to 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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spelling pubmed-53405952017-05-30 Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial? Rolls, Barbara J. Roe, Liane S. James, Brittany L. Sanchez, Christine E. Int J Obes (Lond) Article BACKGROUND/OBJECTIVES: Controlling food portion sizes can help reduce energy intake, but the effect of different portion-control methods on weight management is not known. In a one-year randomized trial, we tested whether the efficacy of a behavioral weight-loss program was improved by incorporating either of two portion-control strategies instead of standard advice about eating less. SUBJECTS/METHODS: The 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 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%). RESULTS: The 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±SE 5.2±0.4 kg) or Month 12 (4.5±0.5 kg). After one 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. CONCLUSIONS: Incorporating instruction on portion-control strategies within a one-year behavioral program did not lead to 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. 2016-11-30 2017-03 /pmc/articles/PMC5340595/ /pubmed/27899807 http://dx.doi.org/10.1038/ijo.2016.217 Text en Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms
spellingShingle Article
Rolls, Barbara J.
Roe, Liane S.
James, Brittany L.
Sanchez, Christine E.
Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
title Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
title_full Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
title_fullStr Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
title_full_unstemmed Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
title_short Does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
title_sort does the incorporation of portion-control strategies in a behavioral program improve weight loss in a one-year randomized controlled trial?
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5340595/
https://www.ncbi.nlm.nih.gov/pubmed/27899807
http://dx.doi.org/10.1038/ijo.2016.217
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