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Dietary assessment methods evaluated in the Malmö food study
E Callmer1, E Riboli, R Saracci
1Department of Medical Nutrition, Huddinge Unversity Hospital, Sweden.
Journal of Internal Medicine
|January 1, 1993
Summary
This study assessed dietary assessment methods for cancer research. Both a food-use questionnaire and a combined food frequency questionnaire with a diet diary showed good validity compared to weighed food records.
Area of Science:
- Nutrition science
- Epidemiology
- Dietary assessment methodology
Background:
- Prospective cohort studies require validated dietary assessment tools.
- Accurate dietary data is crucial for understanding diet-cancer relationships.
Purpose of the Study:
- To evaluate the relative validity of two dietary assessment methods.
- To determine suitability for a prospective cohort study on diet and cancer.
Main Methods:
- Comparison of a long food-use questionnaire and a combined food frequency questionnaire/diet diary against a 18-day weighed food record reference method.
- Study conducted on a random sample of the Malmö population (1984-1985).
Main Results:
- Good subject compliance and acceptance of the diet diary.
- Both methods demonstrated fair correlations (0.40-0.60) with the reference method for most nutrients, adjusted for energy.
- Both methods tended to overestimate intake of macronutrients and micronutrients.
Conclusions:
- The evaluated dietary assessment methods show reasonable validity for use in prospective cohort studies.
- Dietary assessment methods may overestimate nutrient intake, requiring careful interpretation of results.