Document Detail

Reproducibility of a short semi-quantitative food group questionnaire and its performance in estimating nutrient intake compared with a 7-day diet diary in the Million Women Study.
MedLine Citation:
PMID:  15877913     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To assess the short- and long-term reproducibility of a short food group questionnaire, and to compare its performance for estimating nutrient intakes in comparison with a 7-day diet diary. DESIGN: Participants for the reproducibility study completed the food group questionnaire at two time points, up to 2 years apart. Participants for the performance study completed both the food group questionnaire and a 7-day diet diary a few months apart. Reproducibility was assessed by kappa statistics and percentage change between the two questionnaires; performance was assessed by kappa statistics, rank correlations and percentages of participants classified into the same and opposite thirds of intake. SETTING: A random sample of participants in the Million Women Study, a population-based prospective study in the UK. SUBJECTS: In total, 12 221 women aged 50-64 years. RESULTS: In the reproducibility study, 75% of the food group items showed at least moderate agreement for all four time-point comparisons. Items showing fair agreement or worse tended to be those where few respondents reported eating them more than once a week, those consumed in small amounts and those relating to types of fat consumed. Compared with the diet diary, the food group questionnaire showed consistently reasonable performance for the nutrients carbohydrate, saturated fat, cholesterol, total sugars, alcohol, fibre, calcium, riboflavin, folate and vitamin C. CONCLUSIONS: The short food group questionnaire used in this study has been shown to be reproducible over time and to perform reasonably well for the assessment of a number of dietary nutrients.
Andrew W Roddam; Elizabeth Spencer; Emily Banks; Valerie Beral; Gillian Reeves; Paul Appleby; Isobel Barnes; David C Whiteman; Timothy J Key
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Public health nutrition     Volume:  8     ISSN:  1368-9800     ISO Abbreviation:  Public Health Nutr     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-05-09     Completed Date:  2005-06-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9808463     Medline TA:  Public Health Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  201-13     Citation Subset:  IM    
Cancer Research UK Epidemiology Unit, University of Oxford, Radcliffe Infirmary, Oxford OX2 6HE, UK.
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MeSH Terms
Cross-Sectional Studies
Diet Records
Diet Surveys
Food Habits*
Great Britain
Middle Aged
Prospective Studies
Questionnaires / standards*
Reproducibility of Results
Sensitivity and Specificity

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