The Influence of Factors on Accuracy of Reported Dietary Intake

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
University of Tennessee
ClinicalTrials.gov Identifier:
NCT00939016
First received: July 8, 2009
Last updated: November 14, 2012
Last verified: November 2012
  Purpose

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 Intervention
Dietary Assessment
24-hour Dietary Recall
Dietary Restraint
Social Desirability
Other: Lunch meal with 24 hour dietary recall

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Single Blind (Subject)
Primary Purpose: Basic Science
Official Title: The Influence of Dietary Restraint, Social Desirability and Food Type on Accuracy of Reported Dietary Intake

Further study details as provided by University of Tennessee:

Primary Outcome Measures:
  • Accuracy of reported dietary intake compared to measure intake of a laboratory meal. [ Time Frame: 1 day. ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Dietary Restraint Score of participant. [ Time Frame: 1 day. ] [ Designated as safety issue: No ]
  • Social Desirability Score of participant. [ Time Frame: 1 day. ] [ Designated as safety issue: No ]

Enrollment: 40
Study Start Date: September 2008
Study Completion Date: December 2011
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
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.

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.

  Eligibility

Ages Eligible for Study:   18 Years to 25 Years
Genders 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
  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: NCT00939016

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

No publications provided

Responsible Party: University of Tennessee
ClinicalTrials.gov Identifier: NCT00939016     History of Changes
Other Study ID Numbers: University of TN IRB 7701 B
Study First Received: July 8, 2009
Last Updated: November 14, 2012
Health Authority: United States: Institutional Review Board

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

ClinicalTrials.gov processed this record on September 22, 2014