Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
186 participants
INTERVENTIONAL
2012-07-31
2015-03-31
Brief Summary
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The second aim of the research is to determine the effects of the programs on knowledge and consumption of appropriate portions, as assessed by innovative assessment methods and multiple-pass dietary recalls. The third aim is to conduct exploratory analyses of individual factors that may influence the response to the portion-control interventions, such as psychosocial indicators, blood biomarkers, and measures of adherence to the interventions. The expected outcome of the project is that it will lead to the development of specific, evidence-based strategies to help control portion sizes in order to manage weight.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
SINGLE
Study Groups
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Portion size instruction
Advice on diet, physical activity, and behavior change. Instruction in food portion size.
Advice on diet, physical activity, and behavior change
Individuals will participate in individual sessions with Registered Dietitians providing basic instruction in principles of weight loss. The program will instruct individuals on the principles of healthy eating and nutrition during calorie restriction. These materials include one module with general information on the importance of limiting portion sizes. The program will also include instruction on physical activity and behavioral strategies for weight loss.
Instruction in food portion size
Individuals assigned to this program will participate in individual instructional sessions with specialized materials and tools that address food selection and choosing appropriate portion sizes of various foods.
Pre-portioned foods
Advice on diet, physical activity, and behavior change. Provision of pre-portioned foods.
Advice on diet, physical activity, and behavior change
Individuals will participate in individual sessions with Registered Dietitians providing basic instruction in principles of weight loss. The program will instruct individuals on the principles of healthy eating and nutrition during calorie restriction. These materials include one module with general information on the importance of limiting portion sizes. The program will also include instruction on physical activity and behavioral strategies for weight loss.
Provision of pre-portioned foods
Individuals assigned to this program will be provided with commercially available pre-portioned foods and will be taught effective ways to incorporate them into their daily diet.
Comparison
Advice on diet, physical activity, and behavior change. Advice on healthy eating for weight loss.
Advice on diet, physical activity, and behavior change
Individuals will participate in individual sessions with Registered Dietitians providing basic instruction in principles of weight loss. The program will instruct individuals on the principles of healthy eating and nutrition during calorie restriction. These materials include one module with general information on the importance of limiting portion sizes. The program will also include instruction on physical activity and behavioral strategies for weight loss.
Advice on healthy eating for weight loss
Individuals assigned to this program will participate in individual instructional sessions that address principles of healthy eating while on a calorie-restricted diet.
Interventions
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Advice on diet, physical activity, and behavior change
Individuals will participate in individual sessions with Registered Dietitians providing basic instruction in principles of weight loss. The program will instruct individuals on the principles of healthy eating and nutrition during calorie restriction. These materials include one module with general information on the importance of limiting portion sizes. The program will also include instruction on physical activity and behavioral strategies for weight loss.
Instruction in food portion size
Individuals assigned to this program will participate in individual instructional sessions with specialized materials and tools that address food selection and choosing appropriate portion sizes of various foods.
Provision of pre-portioned foods
Individuals assigned to this program will be provided with commercially available pre-portioned foods and will be taught effective ways to incorporate them into their daily diet.
Advice on healthy eating for weight loss
Individuals assigned to this program will participate in individual instructional sessions that address principles of healthy eating while on a calorie-restricted diet.
Eligibility Criteria
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Inclusion Criteria
* Able to safely engage in physical activity (walking)
* Able to attend regular instructional sessions at University Park, Pennsylvania
Exclusion Criteria
* report symptoms indicative of depression or disordered eating
* report serious food allergies or intolerance
* current or planned participation in a weight-loss program
* pregnant or lactating or planning to become pregnant in the next 18 months
20 Years
65 Years
FEMALE
No
Sponsors
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National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Penn State University
OTHER
Responsible Party
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Barbara J. Rolls
Principal Investigator
Principal Investigators
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Barbara J. Rolls, PhD
Role: PRINCIPAL_INVESTIGATOR
Penn State University
Locations
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Penn State University Laboratory for the Study of Human Ingestive Behavior
University Park, Pennsylvania, United States
Countries
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References
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Roe LS, Rolls BJ. Which strategies to manage problem foods were related to weight loss in a randomized clinical trial? Appetite. 2020 Aug 1;151:104687. doi: 10.1016/j.appet.2020.104687. Epub 2020 Mar 29.
James BL, Loken E, Roe LS, Rolls BJ. The Weight-Related Eating Questionnaire offers a concise alternative to the Three-Factor Eating Questionnaire for measuring eating behaviors related to weight loss. Appetite. 2017 Sep 1;116:108-114. doi: 10.1016/j.appet.2017.04.023. Epub 2017 Apr 22.
Other Identifiers
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PortionSize101
Identifier Type: -
Identifier Source: org_study_id
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