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Related Concept Videos

Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

Assessment of the Gastrointestinal System II: Health Perception Pattern

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Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
58

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Updated: May 17, 2025

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Relative Validity and Reproducibility of a Semi-Quantitative Web-Based Food Frequency Questionnaire for Swiss Adults.

Sarah T Pannen1,2, Elsa Chevillard3, Angeline Chatelan3

  • 1Division of Chronic Disease Epidemiology, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Hirschengraben 84, 8001 Zurich, Switzerland.

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|May 14, 2025
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Summary

The Swiss eFFQ is a reproducible and user-friendly tool for assessing diet in Swiss adults. It demonstrated acceptable accuracy in categorizing food intake, making it valuable for large studies.

Keywords:
dietary assessmentfood frequency questionnairerelative validityreproducibilityusabilityweb-based FFQ

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Area of Science:

  • Nutrition Science
  • Epidemiology
  • Public Health

Background:

  • Food frequency questionnaires (FFQs) are crucial for large epidemiological studies assessing diet-health relationships.
  • Validation of FFQs in the target population is essential before implementation.
  • The Swiss eFFQ is a novel web-based tool requiring assessment of its performance.

Purpose of the Study:

  • To evaluate the relative validity, reproducibility, and usability of the Swiss eFFQ.
  • To compare dietary intake data from the Swiss eFFQ with a 4-day estimated food record (4-d FR).
  • To determine the accuracy of the Swiss eFFQ in classifying participants' food intake.

Main Methods:

  • A convenience sample of 177 Swiss adults completed the Swiss eFFQ twice and a 4-d FR.
  • Dietary data were analyzed for energy, nutrient, and food group intakes.
  • Statistical methods included bias analysis, Wilcoxon signed-rank test, quartile cross-classification, Cohen's kappa (Kw), and correlation coefficients.

Main Results:

  • The Swiss eFFQ was user-friendly, with a completion time under 35 minutes.
  • It tended to underestimate nutrient and food intake compared to the 4-d FR.
  • Reproducibility (median Spearman: 0.70) and validity (median crude Spearman: 0.45 for food groups) were acceptable.

Conclusions:

  • The Swiss eFFQ is a reproducible and user-friendly dietary assessment tool for Swiss adults.
  • It demonstrates acceptable accuracy for categorizing food intake in large populations.
  • The tool offers advantages for dietary assessment in Swiss adult populations.