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How accurate are adolescents in portion-size estimation using the computer tool young adolescents' nutrition assessment on computer (YANA-C)?

(2010) BRITISH JOURNAL OF NUTRITION. 103(12). p.1844-1850
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Abstract
Computer-administered questionnaires have received increased attention for large-scale population research on nutrition. In Belgium-Flanders, Young Adolescents' Nutrition Assessment on Computer (YANA-C) has been developed. In this tool, standardised photographs are available to assist in portion-size estimation. The purpose of the present study is to assess how accurate adolescents are in estimating portion sizes of food using YANA-C. A convenience sample, aged 11-17 years, estimated the amounts of ten commonly consumed foods (breakfast cereals, French fries, pasta, rice, apple sauce, carrots and peas, crisps, creamy veloute, red cabbage, and peas). Two procedures were followed: (1) short-term recall: adolescents (n 73) self-served their usual portions of the ten foods and estimated the amounts later the same day; (2) real-time perception: adolescents (n 128) estimated two sets (different portions) of pre-weighed portions displayed near the computer. Self-served portions were, on average, 8 % underestimated; significant underestimates were found for breakfast cereals. French fries, peas, and carrots and peas. Spearman's correlations between the self-served and estimated weights varied between 0.51 and 0.84, with an average of 0.72. The kappa statistics were moderate (> 0.4) for all but one item. Pre-weighed portions were, on average, 15% underestimated, with significant underestimates for fourteen of the twenty portions. Photographs of food items can serve as a good aid in ranking subjects; however, to assess the actual intake at a group level, underestimation must be considered.
Keywords
IRON, CONSUMPTION, REPRODUCIBILITY, ATLAS, PHOTOGRAPHS, CHILDREN, CRITERION VALIDITY, DIETARY, FOOD FREQUENCY QUESTIONNAIRE, BLACK-ADOLESCENTS

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Chicago
Vereecken, Carine, Sophie Dohogne, Marc Covents, and Lea Maes. 2010. “How Accurate Are Adolescents in Portion-size Estimation Using the Computer Tool Young Adolescents’ Nutrition Assessment on Computer (YANA-C)?” British Journal of Nutrition 103 (12): 1844–1850.
APA
Vereecken, C., Dohogne, S., Covents, M., & Maes, L. (2010). How accurate are adolescents in portion-size estimation using the computer tool young adolescents’ nutrition assessment on computer (YANA-C)? BRITISH JOURNAL OF NUTRITION, 103(12), 1844–1850.
Vancouver
1.
Vereecken C, Dohogne S, Covents M, Maes L. How accurate are adolescents in portion-size estimation using the computer tool young adolescents’ nutrition assessment on computer (YANA-C)? BRITISH JOURNAL OF NUTRITION. 2010;103(12):1844–50.
MLA
Vereecken, Carine, Sophie Dohogne, Marc Covents, et al. “How Accurate Are Adolescents in Portion-size Estimation Using the Computer Tool Young Adolescents’ Nutrition Assessment on Computer (YANA-C)?” BRITISH JOURNAL OF NUTRITION 103.12 (2010): 1844–1850. Print.
@article{1175172,
  abstract     = {Computer-administered questionnaires have received increased attention for large-scale population research on nutrition. In Belgium-Flanders, Young Adolescents' Nutrition Assessment on Computer (YANA-C) has been developed. In this tool, standardised photographs are available to assist in portion-size estimation. The purpose of the present study is to assess how accurate adolescents are in estimating portion sizes of food using YANA-C. A convenience sample, aged 11-17 years, estimated the amounts of ten commonly consumed foods (breakfast cereals, French fries, pasta, rice, apple sauce, carrots and peas, crisps, creamy veloute, red cabbage, and peas). Two procedures were followed: (1) short-term recall: adolescents (n 73) self-served their usual portions of the ten foods and estimated the amounts later the same day; (2) real-time perception: adolescents (n 128) estimated two sets (different portions) of pre-weighed portions displayed near the computer. Self-served portions were, on average, 8 \% underestimated; significant underestimates were found for breakfast cereals. French fries, peas, and carrots and peas. Spearman's correlations between the self-served and estimated weights varied between 0.51 and 0.84, with an average of 0.72. The kappa statistics were moderate ({\textrangle} 0.4) for all but one item. Pre-weighed portions were, on average, 15\% underestimated, with significant underestimates for fourteen of the twenty portions. Photographs of food items can serve as a good aid in ranking subjects; however, to assess the actual intake at a group level, underestimation must be considered.},
  author       = {Vereecken, Carine and Dohogne, Sophie and Covents, Marc and Maes, Lea},
  issn         = {0007-1145},
  journal      = {BRITISH JOURNAL OF NUTRITION},
  keyword      = {IRON,CONSUMPTION,REPRODUCIBILITY,ATLAS,PHOTOGRAPHS,CHILDREN,CRITERION VALIDITY,DIETARY,FOOD FREQUENCY QUESTIONNAIRE,BLACK-ADOLESCENTS},
  language     = {eng},
  number       = {12},
  pages        = {1844--1850},
  title        = {How accurate are adolescents in portion-size estimation using the computer tool young adolescents' nutrition assessment on computer (YANA-C)?},
  url          = {http://dx.doi.org/10.1017/S0007114510000127},
  volume       = {103},
  year         = {2010},
}

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