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Evaluation of brief dietary questions to estimate vegetable and fruit consumption - using serum carotenoids and red-cell folate

Coyne, Terry, Ibiebele, Torukiri I., McNaughton, Sarah, Rutishauser, Ingrid, O'Dea, Kerin, Hodge, Allison M., McClintock, Christine, Findlay, Michael G. and Lee, Amanda (2005). Evaluation of brief dietary questions to estimate vegetable and fruit consumption - using serum carotenoids and red-cell folate. Public Health Nutrition,8(3):298-308.

Document type: Journal Article
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Title Evaluation of brief dietary questions to estimate vegetable and fruit consumption - using serum carotenoids and red-cell folate
Author Coyne, Terry
Ibiebele, Torukiri I.
McNaughton, Sarah
Rutishauser, Ingrid
O'Dea, Kerin
Hodge, Allison M.
McClintock, Christine
Findlay, Michael G.
Lee, Amanda
Journal Name Public Health Nutrition
Publication Date 2005
Volume Number 8
Issue Number 3
ISSN 1368-9800   (check CDU catalogue open catalogue search in new window)
Start Page 298
End Page 308
Total Pages 10
Place of Publication United Kingdom
Publisher Cambridge University Press
HERDC Category C1 - Journal Article (DEST)
Abstract Objective To evaluate responses to self-administered brief questions regarding consumption of vegetables and fruit by comparison with blood levels of serum carotenoids and red-cell folate.

Design
A cross-sectional study in which participants reported their usual intake of fruit and vegetables in servings per day, and serum levels of five carotenoids (α-carotene, β-carotene, β-cryptoxanthin, lutein/zeaxanthin and lycopene) and red-cell folate were measured. Serum carotenoid levels were determined by high-performance liquid chromatography, and red-cell folate by an automated immunoassay system.

Settings and subjects
Between October and December 2000, a sample of 1598 adults aged 25 years and over, from six randomly selected urban centres in Queensland, Australia, were examined as part of a national study conducted to determine the prevalence of diabetes and associated cardiovascular risk factors.

Results Statistically significant (P<0.01) associations with vegetable and fruit intake (categorised into groups: ≤1 serving, 2–3 servings and ≥4 servings per day) were observed for α-carotene, β-carotene, β-cryptoxanthin, lutein/zeaxanthin and red-cell folate. The mean level of these carotenoids and of red-cell folate increased with increasing frequency of reported servings of vegetables and fruit, both before and after adjusting for potential confounding factors. A significant association with lycopene was observed only for vegetable intake before adjusting for confounders.

Conclusions
These data indicate that brief questions may be a simple and valuable tool for monitoring vegetable and fruit intake in this population.
Keywords Vegetables
Fruit
Dietary intake methods
Serum carotenoids
Red-cell folate
Antioxidants
Biological markers
Brief questions
Short questions
Surveys
DOI http://dx.doi.org/10.1079/PHN2004688   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
Additional Notes Copyright bye the Cambridge University Press


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