ArticlePediatric obesity2026
Validity of the PortionSize App for Assessing Children's Dietary Intake: Results From a Pilot Study Conducted in Controlled and Free-Living Settings.
Article in Pediatric obesity, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05587816 (Evaluating the Validity of a Novel Tool to Measure Children's Food Intake and Improve Health), which is not on this map. Cited by 1 paper.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Evaluating the Validity of a Novel Tool to Measure Children's Food Intake and Improve Health
Who cites it
1 citing paper in PubMed.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
backgroundPortionSize is a mobile app that allows users to assess dietary intake and provide feedback in real-time.
objectiveTo assess the validity of the PortionSize app for estimating children's dietary intake when assessed by the children themselves (phase 1) and relative agreement of the app when assessed by their parents (phase 2).
methodsThis pilot study recruited 31 child/parent dyads. Each dyad was trained on the PortionSize app to assess dietary intake. In phase 1, children (7-12 years) assessed dietary intake in a controlled setting, and their assessments were compared with weighed meals. In phase 2, parents assessed their child's dietary intake in a free-living setting, and the criterion measure was the digital photography of foods (DPF) method.
resultsChildren's energy intake assessments using PortionSize were equivalent to weighed meals (p < 0.05, effect size: 0.22), while energy intake estimates by parents using PortionSize were not equivalent to the DPF method (p > 0.05, effect size: 0.26). The mean percent error between the measurements was 9.1% in phase 1 and 16.5% in phase 2.
conclusionsThe findings suggest PortionSize may be accurate in controlled settings when used by children. In a free-living setting when used by parents, results indicated PortionSize needs improvements in methods for estimating portion size and food identification. The study findings from phase 2 reflect feasibility and relative agreement rather than validation against true intake. This pilot study focuses on initial validity, relative agreement, and user satisfaction, indicating potential for future clinical and community-based pediatric dietary and weight management applications.
trial registrationNCT05587816 (https://clinicaltrials.gov/study/NCT05587816?term=PortionSize%20app&rank=1).
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.