• J Am Diet Assoc · Apr 2003

    Secondary analysis of a marketing research database reveals patterns in dairy product purchases over time.

    • Timothy W Van Wave and Michael Decker.
    • Department of Family Medicine of the University of Minnesota School of Medicine Duluth, Duluth, MN 55812, USA. tvanwave@d.umn.edu
    • J Am Diet Assoc. 2003 Apr 1; 103 (4): 445-53.

    ObjectiveDevelopment of a method using marketing research data to assess food purchase behavior and consequent nutrient availability for purposes of nutrition surveillance, evaluation of intervention effects, and epidemiologic studies of diet-health relationships.DesignData collected on household food purchases accrued over a 13-week period were selected by using Universal Product Code numbers and household characteristics from a marketing research database. Universal Product Code numbers for 39,408 dairy product purchases were linked to a standard reference for food composition to estimate the nutrient content of foods purchased over time.Subjects/SettingTwo thousand one hundred sixty-one households located in Victoria, Texas, and surrounding communities who were active members of a frequent shopper program.AnalysesDemographic characteristics of sample households and the nutrient content of their dairy product purchases were analyzed using frequency distribution, cross tabulation, analysis of variance, and t test procedures.ResultsA method for using marketing research data was successfully used to estimate household purchases of specific foods and their nutrient content from a marketing database containing hundreds of thousands of records. Distribution of dairy product purchases and their concomitant nutrients between Hispanic and non-Hispanic households were significant (P<.01, P<.001, respectively) and sustained over time.Application/ConclusionsPurchase records from large, nationally representative panels of shoppers, such as those maintained by major market research companies, might be used to accomplish detailed longitudinal epidemiologic studies or surveillance of national food- and nutrient-purchasing patterns within and between countries and segments of their respective populations.

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