Free-living Validation of the RFPM in Adolescents
- Conditions
- Food PhotographyDietary AssessmentEnergy IntakeFood Intake
- Interventions
- Other: Tests of the validity of the RFPM and SmartIntake app.
- Registration Number
- NCT04148560
- Lead Sponsor
- Pennington Biomedical Research Center
- Brief Summary
The primary aim of this small study is to test the validity of the Remote Food Photography Method and an updated SmartIntake app in a sample of adolescents. The investigators will test the validity (accuracy) of the method/app at estimating energy intake in free-living conditions over approximately three days compared to doubly labeled water. This is a small study that has low statistical power, but will provide important data nonetheless and inform future research.
- Detailed Description
Energy intake (EI) is an important predictor of weight gain (1) and accurate methods to measure children's and adolescent's EI are needed. Self-report methods (e.g., 24-hour recall and food records) have their strengths and are frequently used to measure children's EI. Nonetheless, they also have significant limitations, including participant and caregiver burden and lack of near real-time data.
Our group developed the Remote Food Photography Method (RFPM) to measure the EI of adults in near real-time and the validity data in adults are exceptional; the RFPM underestimates EI in laboratory settings by less than 6% and in free-living conditions by less than 7% compared to weighed foods and by less than 4% compared to doubly labeled water (DLW) over 6 days. At the same time, participant burden is drastically reduced compared to self-report methods, as participants are only required to capture images of their food selection and plate waste with a smartphone app and send these images to the laboratory for analysis. This validation study aims to assess the accuracy of the RFPM and SmartIntake app in a sample of adolescents in free-living conditions.
Recruitment & Eligibility
- Status
- ACTIVE_NOT_RECRUITING
- Sex
- All
- Target Recruitment
- 29
- boy or girl of any race
- age between 12 and 18 years
- willingness to use the RFPM/SmartIntake app for 3 days, in addition to a 1-2 day run-in period
- willingness to be responsive to study staff when prompted for additional information when using the RFPM/SmartIntake app
- parental support of the project, except for 18-year-olds
- Individuals may not qualify for this study based on other eligibility criteria not listed. The study coordinator determine this on a case-by-case basis
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Study sample Tests of the validity of the RFPM and SmartIntake app. Individuals who participate in this validation study
- Primary Outcome Measures
Name Time Method Equivalence between energy intake (kcal/day) measured with the RFPM and DLW 3 days Energy intake is measured by the RFPM and DLW in kcal per day over 3 days. We will use the mean of the 3 days in the analyses. Two one-sided paired t-tests (α = 0.05 for each) will be performed in this pilot with equivalence bounds at 2% increments between 8% and 34% to determine equivalence in kcal estimates between RFPM and DLW.
- Secondary Outcome Measures
Name Time Method Mean percentage error of RFPM relative to DLW 3 days MPE = (RFPM - DLW) / DLW × 100
Mean difference between the RFPM and DLW on kcal/day 3 days RFPM - DLW (kcal), with each method measuring energy intake over three days, and the mean of the three days for each method being included in the calculations and analyses.
Trial Locations
- Locations (1)
Pennington Biomedical Research Center
🇺🇸Baton Rouge, Louisiana, United States