Calibration of the dietary questionnaire for the Canadian study of diet, lifestyle and health cohort

Meera G. Jain, Thomas E. Rohan, Colin L. Soskolne, Nancy Kreiger

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Objective: For proper interpretation of results from epidemiological studies that use food-frequency questionnaires (FFQs), it is necessary to know the relationship between reported intakes from the FFQ and true usual intake. In this paper, we report a calibration study conducted to investigate the performance of the FFQ used in a cohort study, the Canadian Study of Diet, Lifestyle and Health. Methods: Over a 1-year period, 151 men and 159 women completed a full set of questionnaires including a self-administered baseline FFQ, three 24-hour diet recalls administered by telephone, and a second FFQ self-administered subsequently. The association between the nutrient estimates derived from the FFQs and the diet recalls was evaluated by calculating deattenuated Pearson's correlation coefficients. Results: The FFQs estimated mean daily nutrient intakes higher than the diet recalls. When the log-transformed and energy-adjusted nutrient intakes from the average of three 24-hour recalls were compared against the baseline FFQ, the following deattenuated correlations were obtained in men and women, respectively: total energy 0.44 and 0.32, total fat 0.64 and 0.68, saturated fat 0.68 and 0.70, dietary fibre 0.65 and 0.44, vitamin E 0.32 and 0.37, vitamin C 0.40 and 0.37, β-carotene 0.34 and 0.29, alcohol 0.74 and 0.67, caffeine 0.81 and 0.76, with a median correlation of 0.49 and 0.53. Correlations between the second FFQ and diet recalls were similar. The correlations between the two FFQs as a test of reliability had a median value 0.64 for men and 0.63 for women for selected nutrients. Conclusions: The study suggests that the FFQ method gives acceptable levels of nutrients or food component estimates, as assessed by this calibration study against diet recalls, when limited to energy-adjusted and deattenuated values.

Original languageEnglish (US)
Pages (from-to)79-86
Number of pages8
JournalPublic Health Nutrition
Volume6
Issue number1
DOIs
StatePublished - Feb 2003

Fingerprint

food frequency questionnaires
diet study techniques
Calibration
lifestyle
Life Style
calibration
questionnaires
Diet
Food
Health
diet recall
nutrient intake
energy
nutrients
Surveys and Questionnaires
carotenes
caffeine
Fats
cohort studies
epidemiological studies

Keywords

  • Calibration
  • Diet methods
  • Food-frequency questionnaires
  • Validation

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Public Health, Environmental and Occupational Health
  • Food Science

Cite this

Calibration of the dietary questionnaire for the Canadian study of diet, lifestyle and health cohort. / Jain, Meera G.; Rohan, Thomas E.; Soskolne, Colin L.; Kreiger, Nancy.

In: Public Health Nutrition, Vol. 6, No. 1, 02.2003, p. 79-86.

Research output: Contribution to journalArticle

Jain, Meera G. ; Rohan, Thomas E. ; Soskolne, Colin L. ; Kreiger, Nancy. / Calibration of the dietary questionnaire for the Canadian study of diet, lifestyle and health cohort. In: Public Health Nutrition. 2003 ; Vol. 6, No. 1. pp. 79-86.
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