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Related Experiment Videos

Comparison of two frequency questionnaires for quantifying fruit and vegetable intake.

S Amanatidis1, D Mackerras, J M Simpson

  • 1Central Sydney Area Health Service, Division of Population Health, Camperdown, NSW 2050, Australia.

Public Health Nutrition
|April 12, 2001
PubMed
Summary

Correcting fruit and vegetable intake data from a food frequency questionnaire (FFQ) using summary questions significantly altered nutrient estimates but minimally impacted individual rankings. Further research is needed to validate these dietary assessment methods.

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Area of Science:

  • Nutritional Science
  • Dietary Assessment Methods
  • Public Health Nutrition

Background:

  • Food Frequency Questionnaires (FFQs) are widely used for dietary assessment.
  • Summary questions offer a potentially simpler method for assessing fruit and vegetable intake.
  • Discrepancies between FFQ and summary question data can impact nutrient intake estimations.

Purpose of the Study:

  • To evaluate the impact of correcting fruit and vegetable intake data from a long FFQ using two summary questions.
  • To assess the effect on individual nutrient intake rankings and total nutrient intakes.
  • To compare the performance of a self-administered FFQ with and without corrections for fruit and vegetable intake.

Main Methods:

  • A cohort of 123 women (aged 18-54) participated in the study.

Related Experiment Videos

  • Dietary intake was assessed using a self-administered FFQ and two Block summary questions.
  • FFQ data for fruit and vegetable intake were corrected using responses from the summary questions.

    • Main Results:

    • Significant differences (P < 0.001) were observed in fruit and vegetable intakes between the FFQ and summary questions, with FFQ reporting more than double.
    • Correcting FFQ data led to over 20% lower intakes of beta-carotene, vitamins A and C, and dietary fiber (p < 0.001).
    • Correction methods had minimal impact on the ranking of individuals' nutrient intakes.

    Conclusions:

    • Significant discrepancies exist between FFQ and summary question methods for assessing fruit and vegetable intake.
    • The correction of FFQ data using summary questions substantially alters nutrient intake estimates.
    • Further investigation is required to determine the most accurate method for quantitative comparison with national dietary references.