ArticleJournal of the Academy of Nutrition and Dietetics2018
Reliability and Validity of Digital Imagery Methodology for Measuring Starting Portions and Plate Waste from School Salad Bars.
Article in Journal of the Academy of Nutrition and Dietetics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
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Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it.
- A systematic review of school meal nudge interventions to improve youth food behaviors.The international journal of behavioral nutrition and physical activity · 2020Pooled it
- Trial
- Validity of Weighed and Digital Photography Diet Estimation Study in a Childcare Setting.Journal of human nutrition and dietetics : the official journal of the British Dietetic Association · 2025Article
- Impact of school salad bars on fruit and vegetable selection, intake, and waste in Mid-Atlantic elementary schools.The international journal of behavioral nutrition and physical activity · 2025Observational
- Study design and rationale for TEENS+REACH: Evaluating ripple effects of a family-based lifestyle intervention to untreated family members.Contemporary clinical trials communications · 2024Article
- School Nutrition Personnel Perceptions of School Salad Bars before and after COVID-19.Nutrients · 2024Article
- Design and rationale for evaluating the impact of salad bars on elementary school students' fruit, vegetable, and energy intake: a wait list control, cluster randomized controlled trial.BMC public health · 2022Article
- Salad bars and energy intake in Virginia elementary schools with free meals.Preventive medicine reports · 2021Article
- Using digital imagery to quantify students' added sugar intake at lunch in Title I schools with universal free meals.Preventive medicine reports · 2020Article
- Salad Bars and Fruit and Vegetable Intake in Title I Elementary Schools.Health behavior and policy review · 2020Article
- Validity and Reliability of an Expanded Vegetable Questionnaire Among Elementary School Children.Current developments in nutrition · 2019Article
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
backgroundScientifically sound methods for investigating dietary consumption patterns from self-serve salad bars are needed to inform school policies and programs.
objectiveTo examine the reliability and validity of digital imagery for determining starting portions and plate waste of self-serve salad bar vegetables (which have variable starting portions) compared with manual weights. DESIGN/
methodsIn a laboratory setting, 30 mock salads with 73 vegetables were made, and consumption was simulated. Each component (initial and removed portion) was weighed; photographs of weighed reference portions and pre- and post-consumption mock salads were taken. Seven trained independent raters visually assessed images to estimate starting portions to the nearest ¼ cup and percentage consumed in 20% increments. These values were converted to grams for comparison with weighed values. STATISTICAL ANALYSES: Intraclass correlations between weighed and digital imagery-assessed portions and plate waste were used to assess interrater reliability and validity. Pearson's correlations between weights and digital imagery assessments were also examined. Paired samples t tests were used to evaluate mean differences (in grams) between digital imagery-assessed portions and measured weights.
resultsInterrater reliabilities were excellent for starting portions and plate waste with digital imagery. For accuracy, intraclass correlations were moderate, with lower accuracy for determining starting portions of leafy greens compared with other vegetables. However, accuracy of digital imagery-assessed plate waste was excellent. Digital imagery assessments were not significantly different from measured weights for estimating overall vegetable starting portions or waste; however, digital imagery assessments slightly underestimated starting portions (by 3.5 g) and waste (by 2.1 g) of leafy greens.
conclusionsThis investigation provides preliminary support for use of digital imagery in estimating starting portions and plate waste from school salad bars. Results might inform methods used in empirical investigations of dietary intake in schools with self-serve salad bars.
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