Using cross-check questions to address the problem of mis-reporting of specific food groups on Food Frequency Questionnaires. UKWCS Steering Group. United Kingdom Women's Cohort Study Steering Group.
Eur J Clin Nutr
; 51(10): 708-12, 1997 Oct.
Article
en En
| MEDLINE
| ID: mdl-9347293
ABSTRACT
OBJECTIVE:
To explore the potential mis-reporting of specific food groups from food frequency questionnaire (FFQ) data and to examine the effect of using a weighting factor on estimated nutrient intake and ranking of subjects within the cohort according to nutrient intake. DESIGN ANDSUBJECTS:
A weighting factor was calculated for each of the individual 6572 women aged 35-69 y for four food groups, fish, meat, vegetables and fruit, using FFQ data and cross-check responses.RESULTS:
The vegetables weighting had most effect on median intakes, particularly of fibre, vitamins A, C and E and folate. When all the weightings were applied, the median intakes of vitamins A and E were reduced by 35% and 27% respectively and the vitamin C intake was reduced by 44%. Ranking of subjects within the cohort according to nutrient intake was barely affected by the fish and meat weightings. The vegetable weighting had most effect on vitamin A with a rank correlation coefficient of 0.88. When all the weightings were applied the rank correlations for vitamins A, C and E and folate were all less than 0.90.CONCLUSION:
Inclusion of cross-check questions in FFQs can provide an additional source of information on food group intake. This can be compared with FFQ data to help identify possible over-reporting and then to adjust frequency of intake accordingly.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Encuestas y Cuestionarios
/
Dieta
/
Alimentos
Tipo de estudio:
Etiology_studies
/
Observational_studies
/
Prognostic_studies
Límite:
Adult
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Aged
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Animals
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
Eur J Clin Nutr
Asunto de la revista:
CIENCIAS DA NUTRICAO
Año:
1997
Tipo del documento:
Article