8. The validation of dietary assessment
- 24 April 1997
- book chapter
- Published by Oxford University Press (OUP)
Abstract
Validation considers the context within which measures are being made (national, household, individual) and helps to describe the extent to which observed values differ from the truth. This chapter outlines the general principles that should be applied in the design of validation studies of dietary measurements, and considers some of the statistical techniques that have been developed to overcome the problems which arise from the absence of a reference measure of ‘true’ dietary intakes. The concepts of validity and reproducibility are reviewed. The context of validation is considered (current or past intake; food consumption or nutrient intake; absolute or relative intakes; group versus individual intakes). Validation techniques, including the identification of relevant reference measures, validation procedures, and factors affecting the design of validation studies are considered. Statistical techniques for interpreting findings from validation studies are described in detail.Keywords
This publication has 24 references indexed in Scilit:
- Development and relative validity of a food frequency questionnaire for the estimation of intake of retinol and β‐caroteneNutrition and Cancer, 1989
- Development of a food frequency instrument: Ethnic differences in food sourcesNutrition and Cancer, 1989
- A comparison of two diet history questionnaires that measure usual food intakeNutrition and Cancer, 1989
- Determinants of long‐term (24‐year) diet recall ability using a 21‐item food frequency questionnaireNutrition and Cancer, 1989
- Long‐term (24‐year) recall reliability in cancer cases and controls using a 21‐item food frequency questionnaireNutrition and Cancer, 1989
- The problem of profound mismeasurement and the power of epidemiological studies of diet and cancerNutrition and Cancer, 1988
- The relative validity of a retrospective estimate of food consumption based on a current dietary history and a food frequency listNutrition and Cancer, 1988
- Case‐control study of dietary etiological factors: The Melbourne colorectal cancer studyNutrition and Cancer, 1987
- Observations on the reliability and validity of the design and diet history method in the Melbourne colorectal cancer studyNutrition and Cancer, 1987
- Statistical methods to assess and minimize the role of intra-individual variability in obscuring the relationship between dietary lipids and serum cholesterolJournal of Chronic Diseases, 1978