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Evaluation of brief dietary questions to estimate vegetable and fruit consumption - using serum carotenoids and red-cell folate
journal contribution
posted on 2005-01-01, 00:00 authored by T Coyne, T Ibiebele, Sarah McNaughtonSarah McNaughton, I Rutsihauser, K O'Dea, A Hodge, C McClintock, M Findlay, A LeeObjective 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.
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.
History
Journal
Public health nutritionVolume
8Issue
3Pagination
298 - 308Publisher
CABI PublishingLocation
Wallingford, EnglandPublisher DOI
ISSN
1368-9800eISSN
1475-2727Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2005, CABI PublishingUsage metrics
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No categories selectedKeywords
vegetablesfruitdietary intake methodsserum carotenoidsred-cell folateantioxidantsbiological markersbrief questionsshort questionssurveysScience & TechnologyLife Sciences & BiomedicinePublic, Environmental & Occupational HealthNutrition & DieteticsPLASMA CAROTENOIDSBETA-CAROTENECARDIOVASCULAR-DISEASEWOMENS HEALTHBIOMARKERSRETINOLCANCERHUMANSNUTRITIONCOMMUNITY
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