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Related Experiment Videos

A computerized diet history questionnaire for epidemiologic studies

M L Slattery1, B J Caan, D Duncan

  • 1Department of Family and Preventive Medicine, University of Utah, Salt Lake City 84132.

Journal of the American Dietetic Association
|July 1, 1994
PubMed
Summary

Computerizing the Coronary Artery Risk Factor Development in Young Adult (CARDIA) study diet history questionnaire improved data accuracy. Quality control using audiotapes identified errors missed by visual review, enhancing dietary assessment reliability.

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Area of Science:

  • Epidemiology
  • Nutritional Science
  • Health Informatics

Background:

  • The Coronary Artery Risk Factor Development in Young Adult (CARDIA) study utilizes a diet history questionnaire.
  • Dietary assessment is crucial for understanding diet-disease associations in epidemiologic research.
  • Computerization of questionnaires can streamline data collection and analysis.

Purpose of the Study:

  • To detail the methods for computerizing the CARDIA diet history questionnaire.
  • To outline quality-control procedures for computerized dietary assessment.
  • To evaluate the effectiveness of quality-control measures in identifying data errors.

Main Methods:

  • Developed a computerized version of the diet history questionnaire.
  • Implemented quality-control procedures involving audiotape review alongside visual data inspection.

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  • Applied these methods in a case-control study setting across three centers.
  • Included male and female participants aged 30-79 years.

    • Main Results:

    • Visual review alone would result in 100% error-free computerized forms.
    • Probing errors constituted 47.3% of all identified errors.
    • Probing errors included non-directive probing and failure to verify questionable responses.

    Conclusions:

    • Computerization of the CARDIA diet history questionnaire supports epidemiologic studies on diet and disease.
    • Audiotape review revealed errors not detectable by visual inspection alone.
    • Developed quality-control procedures are adaptable to various dietary assessment methods.