ArticlePloS one2016
Development and Validation of a Photographic Method to Use for Dietary Assessment in School Settings.
Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Validity of the PortionSize App for Assessing Children's Dietary Intake: Results From a Pilot Study Conducted in Controlled and Free-Living Settings.Pediatric obesity · 2026Article
- Comparison of Food Selection with the National School Lunch Program Meal Pattern Guidelines and Assessment of Children's Food Intake and Waste Using Digital Photography in a School Cafeteria.Childhood obesity (Print) · 2025Article
- Plate waste in hospital canteens: a nutritional and environmental analysis in north-eastern Italy.Frontiers in nutrition · 2025Article
- Evaluating the Validity of the PortionSize Smartphone Application for Estimating Dietary Intake in Free-Living Conditions: A Pilot Study.Journal of nutrition education and behavior · 2024Article
- A real-life snapshot: Evaluating exposures to low energy availability in male athletes from various sports.Physiological reports · 2024Article
- Patterns of energy availability and carbohydrate intake differentiate between adaptable and problematic low energy availability in female athletes.Frontiers in sports and active living · 2024Article
- Selecting foods from FNDDS when calculating food intake: Does the reference matter?Journal of food composition and analysis : an official publication of the United Nations University, International Network of Food Data Systems · 2024Article
- Validity of an Artificial Intelligence-Based Application to Identify Foods and Estimate Energy Intake Among Adults: A Pilot Study.Current developments in nutrition · 2023Article
- High availability of vegetables and fruit through government-funded school lunch is not reflected in 4th grade pupils' intake.Food & nutrition research · 2023Article
- Assessing the Initial Validity of the PortionSize App to Estimate Dietary Intake Among Adults: Pilot and Feasibility App Validation Study.JMIR formative research · 2022Article
- Development and validation of nutrient estimates based on a food-photographic record in Japan.Nutrition journal · 2020Article
- Evaluation of a Technological Image-Based Dietary Assessment Tool for Children during Pubertal Growth: A Pilot Study.Nutrients · 2019Article
- Measuring lunchtime consumption in school cafeterias: a validation study of the use of digital photography.Public health nutrition · 2019Article
- An Assessment of the Validity of an Audio-Video Method of Food Journaling for Dietary Quantity and Quality.Journal of nutrition and metabolism · 2019Article
- Article
- The Development and Validation of Food Atlas for Portion Size Estimation in the Balkan Region.Frontiers in nutrition · 2018Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo develop and validate a photographic method aimed at making assessment of dietary intake in school canteens non-obstrusive, practical and feasible.
methodsThe study was conducted in two elementary schools representing two different school canteen systems; main dish being served by canteen staff (Iceland), and complete self-serving (Sweden). Food items in serving and leftovers were weighed and photographed. Trained researchers estimated weights of food items by viewing the photographs and comparing them with pictures of half and full reference portions with known weights. Plates of servings and leftovers from 48 children during five school days (n = 448 plates) and a total of 5967 food items were estimated. The researchers' estimates were then compared with the true weight of the foods and the energy content calculated.
resultsWeighed and estimated amounts correlated across meals both in grams and as total energy (0.853-0.977, p<0.001). The agreement between estimated energy content in school meals was close to the true measurement from weighed records; on average 4-19 kcal below true values. Organisation of meal service impacted the efficacy of the method as seen in the difference between countries; with Iceland (served by canteen staff) having higher rate of acceptable estimates than Sweden (self-serving), being 95% vs 73% for total amount (g) in serving. Iceland more often had serving size between or above the half and full reference plates compared with Sweden.
conclusionsThe photographic method provides acceptable estimates of food and energy intake in school canteens. However, greater accuracy can be expected when foods are served by canteen staff compared with self-serving.
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