Reproducibility and validity of a food-frequency questionnaire designed for use in girls age 7 to 12 years

Julie E. Arnold, Thomas Rohan, Geoffrey Howe, Michael Leblanc

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

This study focused on a food-frequency questionnaire (FFQ) designed to measure nutrient intake in girls aged 7 to 12 years, inclusive. The instrument's reproducibility and validity were assessed using food records (FRs) as "gold standards" of measurement. Log-transformed nutrient intake estimates were compared from two FFQs and between FFQs and FRs. Intraclass correlation coefficients measuring the reproducibility of the FFQ ranged from 0.11 (starch) to 0.69 (fiber). Intraclass correlation coefficients measuring agreement between FFQ and 14-day FR data varied between 0.15 (starch) and 0.68 (vitamin B2) for the first, and between 0.06 (starch) and 0.95 (vitamin B1) for the second FFQ. FFQs were in the best agreement with FRs for the following nutrients: fiber, vitamin B1, vitamin B2, vitamin C, and beta-carotene. Joint classifications revealed that overall, 36% of subjects were similarly categorized by FFQ and FR, and 70% of those in the lowest or highest FR quartiles were found in the lowest or highest two FFQ quartiles, respectively.

Original languageEnglish (US)
Pages (from-to)369-377
Number of pages9
JournalAnnals of Epidemiology
Volume5
Issue number5
DOIs
StatePublished - Sep 1995
Externally publishedYes

Keywords

  • children
  • diet
  • epidemiologic methods
  • food
  • questionnaires

ASJC Scopus subject areas

  • Epidemiology

Fingerprint Dive into the research topics of 'Reproducibility and validity of a food-frequency questionnaire designed for use in girls age 7 to 12 years'. Together they form a unique fingerprint.

  • Cite this