Readiness to Shop for Low-Fat Foods: A Population Study

Ronald C. Plotnikoff, Stephen B. Hotz, Steven T. Johnson, Janice S. Hansen, Nicholas J. Birkett, Lynne E. Leonard, Laura M. Flaman

    Research output: Contribution to journalJournal Articlepeer-review

    16 Citations (Scopus)


    Background: Stages of change are related to dietary fat consumption. Few studies have examined stage occupation within the context of purchasing low-fat foods. Objective: To determine the stage-prevalence of individuals for purchasing low-fat foods; identify the frequency of misclassification into action and maintenance (A/M) stages for purchasing for low-fat foods; and explain the demographic and cognitive-variable differences between pseudo (or false positive) A/M and true A/M individuals. Design: Data were collected using a self-administered questionnaire among English-speaking adults (n=1,001) who were randomly sampled by mail. Statistical analyses performed: Descriptive statistics were used to compare the characteristics of the stage groups. Groups were compared using χ2 tests and Student t test. Results: Of those who reported being in A/M stages, 32% were misclassified by the staging algorithm and were not true A/M low-fat food purchasers. Conclusions: Individuals who are in A/M stages for buying low-fat foods still purchase high-fat foods. Stage misclassification may be a persistent problem in studies of dietary change using the Transtheoretical Model.

    Original languageEnglish
    Pages (from-to)1392-1397
    Number of pages6
    JournalJournal of the American Dietetic Association
    Issue number8
    Publication statusPublished - Aug. 2009


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