The Influence of Factors on Accuracy of Reported Dietary Intake

Not Applicable

Completed

• Conditions: Dietary Assessment; Dietary Restraint; Social Desirability; 24-hour Dietary Recall

• Registration Number: NCT00939016
• Lead Sponsor: 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.

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 Timeline

• Study Start: 2008-09
• Study First Submitted: 2009-07-08
• Study First Submitted QC: 2009-07-10
• Study First Posted: 2009-07-14
• Primary Completion: 2011-12
• Study Completion: 2011-12
• Status Verified: 2018-04
• Last Update Submitted: 2018-04-03
• Last Update Posted: 2018-04-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 40

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
Accuracy of reported dietary intake compared to measure intake of a laboratory meal.	1 day.

Secondary Outcome Measures

Name	Time	Method
Dietary Restraint Score of participant.	1 day.
Social Desirability Score of participant.	1 day.

Trial Locations

Locations (1)

University of Tennessee; 🇺🇸 Knoxville, Tennessee, United States