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A study of the use of a photographic food atlas to estimate served and self‐served portion sizes
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1997
Year
NutritionPublic Health NutritionAgricultural EconomicsFoodwaysFood ChoiceBody CompositionFood Delivery SystemsFood SystemsDietary IntakeFood PhotographsPopulation NutritionWeighed IntakePhotographic Food AtlasPublic HealthFood PolicyHealth SciencesFood DistributionDiet QualitySelf‐served Portion SizesFood QualityMarketingNutritional SciencesFood TextureFood ServiceDietary HealthNutrition Assessment
Background: Although it is generally accepted that a weighed intake is the most valid way of assessing nutrient intake, this is not always the most appropriate method. Photographs have been suggested as a useful aid in assessing portion size when other methods of recording dietary intake are used. Method: Male and female subjects ( n =100) were recruited to assess portion sizes of served amounts of mashed potato or cornflakes using food photographs. A second group of subjects ( n =40) were recruited to assess portion sizes of self‐served mashed potato or cornflakes using the same photographs. Results: Estimates varied from −70.6% underestimation to +198.7% overestimation for mashed potato, with less variation for the cornflakes where portions were served.??? Where the food was self‐served, results ranged from −38% and −64% underestimation to +61% and +88% overestimation for cornflakes and mashed potato, respectively.Correlation coefficients between estimated and actual weights of food showed them to be of statistical significance ( P <0.05). Conclusion: Food photographs are a useful and convenient aid in the estimation of food portion sizes.