Efficacy of Portion Size Measurement Aids (PSMA)
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Purpose
Portion size measurement aids (PSMAs) are tools that facilitate the estimation of food servings. The objectives of this study are to determine (a) if food portion size estimation accuracy differs when using a two dimensional (2D) PSMA (actual-size photos called Portion Size Cards) compared to a 3D PSMA (Portion Size Kit) and (b) whether differences exist in the short-term usefulness of and satisfaction with these PSMAs in a sample of parents of overweight children and youth. We hypothesize that the group that receives the 3D PSMAs will be more accurate in food portion size estimation and will be more satisfied with the tool compared to the group that receives the 2D PSMAs.
| Condition | Intervention |
|---|---|
|
Nutrition Assessment Obesity |
Behavioral: Portion Size Measurement Aids (PSMAs) |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Endpoint Classification: Efficacy Study Intervention Model: Parallel Assignment Masking: Single Blind (Investigator) Primary Purpose: Treatment |
| Official Title: | Exploring the Accuracy and Acceptability of Portion Size Measurement Aids in Parents of Overweight Children |
- Accuracy of food portion size estimation [ Time Frame: At the time of subject interview (single time point) ] [ Designated as safety issue: No ]During the initial interview, the subject receives a brief description of the task and is shown pre-estimated rubber food models. The subject then estimates the portion sizes (volumes) of the rubber food models using either 2D or 3D PSMAs.
- Acceptability (satisfaction and usefulness) of 2D and 3D PSMAs [ Time Frame: 2-4 weeks following the accuracy assessment ] [ Designated as safety issue: No ]After the intial interview, subjects are given either 2D or 3D PSMAs to take home with them to use in a real-world setting. After 2-4 weeks, the researcher team contacts the subjects to complete a brief telephone interview to determine parental satisfaction and usefulness regarding the 2D or 3D PSMAs.
| Estimated Enrollment: | 40 |
| Study Start Date: | April 2010 |
| Estimated Study Completion Date: | October 2012 |
| Estimated Primary Completion Date: | August 2012 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Experimental: 2D Portion Size Measurment Aids (PSMAs)
The 2D PSMAs are life-size photographs of the 3D PSMAs.
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Behavioral: Portion Size Measurement Aids (PSMAs)
Subjects are randomly assigned to receive either 2D or 3D PSMAs to examine accuracy, acceptability and usefulness of the models. Both groups receive brief instructions on the use of the respective PSMAs, complete an accuracy estimation task, and are given the 2D or 3D PSMAs to take home with them to use for 2-4 weeks, after which the researchers telephone parents to complete a brief satisfaction and usefulness survey.
Other Names:
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Experimental: 3D Portion Size Measurement Aids (PSMAs)
The 3D PSMAs include foam rubber replicas of a golf ball, a hockey puck, a tennis ball and a baseball.
|
Behavioral: Portion Size Measurement Aids (PSMAs)
Subjects are randomly assigned to receive either 2D or 3D PSMAs to examine accuracy, acceptability and usefulness of the models. Both groups receive brief instructions on the use of the respective PSMAs, complete an accuracy estimation task, and are given the 2D or 3D PSMAs to take home with them to use for 2-4 weeks, after which the researchers telephone parents to complete a brief satisfaction and usefulness survey.
Other Names:
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Detailed Description:
Forty primary caregivers of overweight children and youth attending the Pediatric Centre for Weight and Health (Edmonton, AB) will be recruited. Participants will be randomly assigned to one of the two groups (2D PSMAs versus 3D PSMAs). After a brief explanation of the respective tool, participants will estimate the volumes of pre-measured rubber food portion models on a test plate. Participants will then be given the 2D or 3D PSMAs to take home with them to use in the real-world. After 2-4 weeks, participants will be telephoned by the research team to complete a brief survey to evaluate their usefulness of and satisfaction with the 2D or 3D PSMAs at home.
Eligibility| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Participants must be primary caregivers of children or youth attending a clinical appointment for weight management (clients must have a BMI greater or equal to the 85th percentile at this clinic)
- Participants must be literate and fluent in English
Exclusion Criteria:
- Any participant who does not meet the above criteria
- Participants must not have had any previous education or resources on food portion sizes at this clinic
Contacts and Locations| Contact: Geoff DC Ball | 780.342.8465 | geoff.ball@ualberta.ca |
| Canada, Alberta | |
| Pediatric Centre for Weight and Health- Edmonton General Continuing Care Centre | Recruiting |
| Edmonton, Alberta, Canada, T6K 0L4 | |
| Contact: Geoff DC Ball 780.342.8465 geoff.ball@ualberta.ca | |
| Principal Investigator: Geoff DC Ball | |
| Principal Investigator: | Geoff DC Ball, PhD, RD | Department of Pediatrics, University of Alberta; Director, Pediatric Centre for Weight and Health |
More Information
No publications provided
| Responsible Party: | Geoff Ball, Associate Professor, Dept Pediatrics and Director, Pediatric Centre for Weight and Health, University of Alberta |
| ClinicalTrials.gov Identifier: | NCT01262768 History of Changes |
| Other Study ID Numbers: | 00010835 |
| Study First Received: | December 16, 2010 |
| Last Updated: | April 19, 2012 |
| Health Authority: | Canada: Ethics Review Committee |
Keywords provided by University of Alberta:
|
Nutrition Obesity Parent Portion Size Estimation Accuracy |
Additional relevant MeSH terms:
|
Obesity Overnutrition Nutrition Disorders |
Overweight Body Weight Signs and Symptoms |
ClinicalTrials.gov processed this record on May 16, 2013