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Trial Outcomes & Findings for PortionSize Study 1 Laboratory-based Evaluation) (NCT NCT04700904)

NCT ID: NCT04700904

Last Updated: 2025-01-27

Results Overview

The outcome variable was the difference between the criterion measure (directly weighed foods from a simulated lunch meal) and two apps: PortionSize and MyFitnessPal. The outcome measure for the PortionSize app was calculated as: energy intake values from PortionSize minus energy intake values from weighed foods. The outcome measure for the MyFitnessPal app was calculated as: energy intake values from MyFitnessPal minus energy intake values from weighed foods.

Recruitment status

COMPLETED

Target enrollment

43 participants

Primary outcome timeframe

2.5 hours

Results posted on

2025-01-27

Participant Flow

Participant milestones

Participant milestones
Measure
MyFitnessPal (V1) PortionSize (V2)
MyFitnessPal app: Dietary tracking completed using a commercial-based dietary assessment application with associated website Portion Size app: Dietary tracking completed using a novel mobile app that relies on food photography to provide immediate feedback to the user on energy (kcals), food groups, alcohol, saturated fat, and added sugar intake.
PortionSize (V1) MyFitnessPal (V2)
Portion Size app: Dietary tracking completed using a novel mobile app that relies on food photography to provide immediate feedback to the user on energy (kcals), food groups, alcohol, saturated fat, and added sugar intake. MyFitnessPal app: Dietary tracking completed using a commercial-based dietary assessment application with associated website
Overall Study
STARTED
21
22
Overall Study
COMPLETED
21
21
Overall Study
NOT COMPLETED
0
1

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

PortionSize Study 1 Laboratory-based Evaluation)

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
All Participants
n=42 Participants
all 42 participants that completed the study
Age, Continuous
36.3 years
STANDARD_DEVIATION 16.6 • n=5 Participants
Sex: Female, Male
Female
23 Participants
n=5 Participants
Sex: Female, Male
Male
19 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
2 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
10 Participants
n=5 Participants
Race (NIH/OMB)
White
28 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
2 Participants
n=5 Participants
Weight
81.5 kg
STANDARD_DEVIATION 22.0 • n=5 Participants
BMI
28.2 kg/m^2
STANDARD_DEVIATION 6.9 • n=5 Participants

PRIMARY outcome

Timeframe: 2.5 hours

Population: All participants completed the study protocols using the PortionSize app and the MyFitnessPal app across two study visits (1 app at each visit). Groups defined in the participant progression section distinguish participants who used the PortionSize app first from those who used the MyFitnessPal app first.

The outcome variable was the difference between the criterion measure (directly weighed foods from a simulated lunch meal) and two apps: PortionSize and MyFitnessPal. The outcome measure for the PortionSize app was calculated as: energy intake values from PortionSize minus energy intake values from weighed foods. The outcome measure for the MyFitnessPal app was calculated as: energy intake values from MyFitnessPal minus energy intake values from weighed foods.

Outcome measures

Outcome measures
Measure
PortionSize App
n=42 Participants
Dietary tracking completed using a novel mobile app that relies on food photography to provide immediate feedback to the user on energy (kcals), food groups, alcohol, saturated fat, and added sugar intake.
MyFitnessPal App
n=42 Participants
Dietary tracking completed using a commercial-based dietary assessment application with associated website
Difference in Simulated Energy (kcal) Intake Between the Criterion Measure (Weighed Food) and Two Smartphone Apps (PortionSize and MyFitness Pal).
-150.1 kcal
Standard Deviation 489.5
79.8 kcal
Standard Deviation 583.3

Adverse Events

All Participants

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Corby Martin

Pennington Biomedical Research Center

Phone: 763-2585

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place