Clinical trial NCT04148560: Free-living Validation of the RFPM in Adolescents
Official title: Validity of the Remote Food Photography Method to Measure Food Intake in Adolescents in Free-living Conditions
Study type: INTERVENTIONAL
Overall status: ACTIVE_NOT_RECRUITING
Phase: NA
Conditions: Dietary Assessment
Energy Intake
Food Intake
Food Photography
Lead sponsor: Pennington Biomedical Research Center
Sponsor class: OTHER
First posted: 2019-11-01
Enrollment: 29
Sex: ALL
Minimum age (years): 12
Maximum age (years): 18
Standard ages: CHILD
ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: OTHER

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.

Eligibility criteria: Inclusion Criteria:

* 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

Exclusion Criteria:

* 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

Primary outcomes:
measure: Equivalence between energy intake (kcal/day) measured with the RFPM and DLW
timeFrame: 3 days
Secondary outcomes:
measure: Mean difference between the RFPM and DLW on kcal/day
timeFrame: 3 days
measure: Mean percentage error of RFPM relative to DLW
timeFrame: 3 days
Other outcomes:
Locations:
city: Baton Rouge
country: United States
facility: Pennington Biomedical Research Center
state: Louisiana
Study officials:
affiliation: Pennington Biomedical Research Center
name: Corby K Martin, PhD
role: PRINCIPAL_INVESTIGATOR
References: