Efficacy of Portion Size Measurement Aids (PSMA)

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Geoff Ball, University of Alberta
ClinicalTrials.gov Identifier:
NCT01262768
First received: December 16, 2010
Last updated: February 19, 2014
Last verified: February 2014
  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: Double Blind (Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Exploring the Accuracy and Acceptability of Portion Size Measurement Aids in Parents of Overweight Children

Resource links provided by NLM:


Further study details as provided by University of Alberta:

Primary Outcome Measures:
  • 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.


Secondary Outcome Measures:
  • 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.


Enrollment: 36
Study Start Date: April 2010
Study Completion Date: January 2014
Primary Completion Date: September 2013 (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.
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:
  • 2D Portion Size Measurement Aids (PSMAs)
  • 3D Portion Size Measurement Aids (PSMAs)
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:
  • 2D Portion Size Measurement Aids (PSMAs)
  • 3D Portion Size Measurement Aids (PSMAs)

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
Criteria

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
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01262768

Locations
Canada, Alberta
Pediatric Centre for Weight and Health- Edmonton General Continuing Care Centre
Edmonton, Alberta, Canada, T6K 0L4
Sponsors and Collaborators
University of Alberta
Investigators
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: February 19, 2014
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 August 28, 2014