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The Influence of Factors on Accuracy of Reported Dietary Intake

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ClinicalTrials.gov Identifier: NCT00939016
Recruitment Status : Completed
First Posted : July 14, 2009
Last Update Posted : April 5, 2018
Sponsor:
Information provided by (Responsible Party):
Hollie Raynor, The University of Tennessee, Knoxville

Brief Summary:
The purpose of this study is to evaluate the influence of dietary restraint, social desirability, and food type on the accuracy of dietary intake reported during a 24-hour recall.

Condition or disease Intervention/treatment Phase
Dietary Assessment 24-hour Dietary Recall Dietary Restraint Social Desirability Other: Lunch meal with 24 hour dietary recall Not Applicable

Detailed Description:
The purpose of this study is to investigate the influence of the interaction among dietary restraint, social desirability, and food type ("healthy" vs. "unhealthy") on the accuracy of reporting consumption of a laboratory meal during a 24-hour dietary recall. The automated multiple-pass method (AMPM) of 24-hour dietary recall is considered the gold standard of dietary assessment however the potential for error and biases is widely acknowledged with a tendency towards underreporting. Underreporting has been linked to many factors including two individual characteristics, dietary restraint and social desirability. Both dietary restraint and social desirability have been extensively studied however the influence of their interaction on reported dietary intake is not fully understood. In addition, a relationship to the types of foods (healthy vs. unhealthy) has also been found. For this study, 40 normal-weight female participants will be recruited at The University of Tennessee using flyers inviting volunteers. Participants will be categorized by dietary restraint, high or low, and social desirability, high or low, based on questions during the initial screening. In a laboratory setting participants will consume a meal of pre-weighed foods, including both "healthy" and "unhealthy" foods. The following day, an AMPM 24-hr dietary recall will be conducted with the participant over the telephone. Accuracy of the reported dietary intake of the laboratory meal will be determined by the equation [(reported intake - measured intake)]/measured intake] x100 for amount (weight or volume) and energy (kilocalories) with comparisons between groups and within food types using mixed factorial analysis of variance.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 40 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Single (Participant)
Primary Purpose: Basic Science
Official Title: The Influence of Dietary Restraint, Social Desirability and Food Type on Accuracy of Reported Dietary Intake
Study Start Date : September 2008
Actual Primary Completion Date : December 2011
Actual Study Completion Date : December 2011

Arm Intervention/treatment
Active Comparator: High SD/ Low DR
This group contains females that exhibit characteristics of high social desirability and low dietary restraint.
Other: Lunch meal with 24 hour dietary recall
Each participant will come into the laboratory for a buffet-style lunch meal, where they are instructed to sample each of the foods served. On the next day, a 24 hour dietary recall is performed to test the participants ability to accurately report amounts and types of food consumed. Measures of dietary restraint and social desirability are taken prior to the laboratory meal via phone interview.
Active Comparator: High SD/ High Dr
This group contains females that exhibit characteristics of high social desirability and high dietary restraint.
Other: Lunch meal with 24 hour dietary recall
Each participant will come into the laboratory for a buffet-style lunch meal, where they are instructed to sample each of the foods served. On the next day, a 24 hour dietary recall is performed to test the participants ability to accurately report amounts and types of food consumed. Measures of dietary restraint and social desirability are taken prior to the laboratory meal via phone interview.
Active Comparator: Low SD/ High DR
This group contains females that exhibit characteristics of low social desirability and high dietary restraint.
Other: Lunch meal with 24 hour dietary recall
Each participant will come into the laboratory for a buffet-style lunch meal, where they are instructed to sample each of the foods served. On the next day, a 24 hour dietary recall is performed to test the participants ability to accurately report amounts and types of food consumed. Measures of dietary restraint and social desirability are taken prior to the laboratory meal via phone interview.
Active Comparator: Low SD/ Low DR
This group contains females that exhibit characteristics of low social desirability and low dietary restraint.
Other: Lunch meal with 24 hour dietary recall
Each participant will come into the laboratory for a buffet-style lunch meal, where they are instructed to sample each of the foods served. On the next day, a 24 hour dietary recall is performed to test the participants ability to accurately report amounts and types of food consumed. Measures of dietary restraint and social desirability are taken prior to the laboratory meal via phone interview.



Primary Outcome Measures :
  1. Accuracy of reported dietary intake compared to measure intake of a laboratory meal. [ Time Frame: 1 day. ]

Secondary Outcome Measures :
  1. Dietary Restraint Score of participant. [ Time Frame: 1 day. ]
  2. Social Desirability Score of participant. [ Time Frame: 1 day. ]


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Ages Eligible for Study:   18 Years to 25 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Normal weight status (BMI 18.5-24.9)
  • Willing to sample study foods

Exclusion Criteria:

  • Individuals majoring in Nutrition or Exercise Science
  • Smokers
  • Individuals taking medication for ADHD
  • Individuals who are pregnant
  • Individuals with allergies to food in study

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00939016


Locations
United States, Tennessee
University of Tennessee
Knoxville, Tennessee, United States, 37996-1920
Sponsors and Collaborators
The University of Tennessee, Knoxville
Investigators
Study Chair: Hollie A Raynor, Ph.D. University of Tennessee, Knoxville

Responsible Party: Hollie Raynor, Professor, The University of Tennessee, Knoxville
ClinicalTrials.gov Identifier: NCT00939016     History of Changes
Other Study ID Numbers: University of TN IRB 7701 B
First Posted: July 14, 2009    Key Record Dates
Last Update Posted: April 5, 2018
Last Verified: April 2018

Keywords provided by Hollie Raynor, The University of Tennessee, Knoxville:
Dietary Assessment
24-hour dietary recall
Dietary Restraint
Social Desirability
Portion estimation
Underreporting