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Related Experiment Videos

Computerized dietary analysis systems: a comparative view.

M O Adelman, J T Dwyer, M Woods

    Journal of the American Dietetic Association
    |October 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

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    Computerized dietary analysis systems vary significantly in nutrient calculations, impacting study results. Differences may stem from the system used, not subject variations, highlighting a need for standardized comparison methods.

    Area of Science:

    • Nutrition Science
    • Computational Nutrition
    • Dietary Assessment

    Background:

    • Computerized dietary analysis systems are crucial tools in nutritional research and practice.
    • Variability in nutrient calculations across different systems can affect research outcomes and dietary recommendations.
    • Standardized methods for comparing these systems are lacking.

    Purpose of the Study:

    • To compare a university-based computerized dietary analysis system with two commercial systems.
    • To identify differences in content, software, database maintenance, and cost.
    • To assess the impact of system variability on nutrient calculations.

    Main Methods:

    • Comparison of three computerized dietary analysis systems: one from Tufts University/Frances Stern Nutrition Center and two commercial systems.

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  • Analysis of three-day food records from ten women (five omnivores, five vegetarians).
  • Evaluation of system characteristics including content, software, database maintenance, and cost.

    • Main Results:

    • Significant differences were observed in calculations for total kilocalories, total fat, saturated fatty acids, polyunsaturated fatty acids, cholesterol, and phosphorus.
    • Variability in nutrient calculations differed between the systems.
    • Skilled coders did not significantly influence nutrient calculations within a single system.

    Conclusions:

    • Observed differences in dietary studies may be attributable to the computerized dietary analysis system employed, rather than subject variability.
    • The lack of valid reference standards hinders the precise identification of errors in nutrient values.
    • Standardized information for comparing computerized dietary analysis systems is needed for consumers and researchers.