title: Secondary analysis of a marketing research database reveals patterns in dairy product purchases over time.
abstract: OBJECTIVE
  Development 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.
  
  
  METHODS
  Data 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.
  
  
  METHODS
  Two thousand one hundred sixty-one households located in Victoria, Texas, and surrounding communities who were active members of a frequent shopper program.
  
  
  METHODS
  Demographic 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.
  
  
  RESULTS
  A 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.
  
  
  CONCLUSIONS
  Purchase 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.
authors.affiliation: Department of Family Medicine of the University of Minnesota School of Medicine Duluth, Duluth, MN 55812, USA. tvanwave@d.umn.edu
authors.forename: Timothy W
authors.initials: TW
authors.lastname: Van Wave
authors.forename: Michael
authors.initials: M
authors.lastname: Decker
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D003132:Commerce / Q000706:statistics & numerical data*; D003258:Consumer Behavior; D003611:Dairy Products / Q000032:analysis / Q000706:statistics & numerical data; D005240:Feasibility Studies; D005247:Feeding Behavior / Q000208:ethnology; D005260:Female; D005504:Food Analysis; D005518:Food Preferences; D015438:Health Behavior; D006293:Health Promotion; D006630:Hispanic or Latino / Q000706:statistics & numerical data*; D006801:Humans; D007182:Income; D007223:Infant; D008297:Male; D040541:Marketing; D009749:Nutrition Surveys; D009753:Nutritive Value; D013781:Texas