Trial reportThe American journal of clinical nutrition2026
The validity of measuring energy and nutrient intake with the Remote Food Photography Method (RFPM) in adolescents.
Trial report in The American journal of clinical nutrition, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Not yet cited in PubMed.
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The trial behind it
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Remote Food Photography for the Real-time Measurement of Children's Food Intake
Validity of the Remote Food Photography Method to Measure Food Intake in Adolescents in Free-living Conditions
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9 authors.
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Abstract
backgroundThe remote food photography method (RFPM) accurately estimates energy intake (EI) in adults, but its validity in adolescents has yet to be tested. Given the low accuracy of self-reported dietary intake in adolescents, evaluating the validity of the RFPM in both controlled and free-living settings is crucial.
objectivesTo examine the validity of the RFPM in estimating adolescents' EI in controlled and free-living settings.
methodsIn Study 1, adolescents (n = 45) used the RFPM/SmartIntake application during 1) a laboratory test meal, 2) a cafeteria meal, and 3) 7 d of free-living intake, with EI estimations validated against weighed food intake, digital photography of foods method, and doubly labeled water, respectively. EI was measured under the same 3 settings with pen-and-paper food records. After refining the application and training, Study 2 (n = 22) repeated the protocol with a 3-d free-living period. For both studies, equivalence was evaluated using two one-sided t-tests (±10% bounds), and linear mixed models assessed RFPM error by participant characteristics.
resultsIn Study 1, RFPM estimates of EI were equivalent to the criterion measure during cafeteria meals [mean standard deviation (SD) error: 4.1 (120.8) kcal; P = 0.005] but were not equivalent for the laboratory test meal [mean (SD) error: 61.1 (112.7) kcal; P = 0.675] and 7 d of free-living intake [mean (SD) error: -887.9 (554.8) kcal/d; P > 0.99]. In Study 2, RFPM EI estimates were equivalent to the criterion measure in the controlled setting [mean (SD) error: -2.2 (86.5) kcal; P = 0.007], but not in free-living settings [mean (SD) error: -782.8 (947.0) kcal/d; P = 0.99]. In both studies, a higher body mass index (in kg/m
conclusionsThe RFPM can accurately estimate the meal-level EI of adolescents in controlled settings; however, significant underestimation occurred in free-living settings in both studies. Previous studies demonstrated the inability to accurately assess adolescents' free-living intake, and the current results extend these findings to the RFPM. This trial was registered at clinicaltrials.gov as Study 1: NCT01719445 (https://clinicaltrials.gov/study/NCT01719445) and Study 2: NCT04148560 (https://clinicaltrials.gov/study/NCT04148560).
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