Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/135131
43 Visitors
47 Hits
0 Downloads
- Title
- Relative and biomarker-based validity of a food frequency questionnaire that measures the intakes of vitamin B₁₂, folate, iron, and zinc in young women
- Related
- Nutrition research, Vol. 31, No. 1, (2011), p.14-20
- DOI
- 10.1016/j.nutres.2010.12.004
- Publisher
- Elsevier
- Date
- 2011
- Author/Creator
- Fayet, Flavia
- Author/Creator
- Flood, Victoria
- Author/Creator
- Petocz, Peter
- Author/Creator
- Samman, Samir
- Description
- Folate, vitamin B₁₂, iron, and zinc are particularly important nutrients for women of childbearing age. We tested the hypothesis that an electronic, 235-item, semiquantitative food frequency questionnaire (FFQ) is a valid measure of dietary intake when compared with repeat dietary 24-hour recalls. Biomarkers of folate, vitamin B₁₂, iron, and zinc were determined because their measurement errors are unrelated to errors in dietary questionnaires. Female adults (N = 256) aged 18 to 35 years completed the FFQ, and a representative subset (n = 53) completed repeat dietary 24-hour recalls. The FFQ estimates (mean ± SD) were 315 ± 132 μg for folate, 3.1 ± 2.1 μg for vitamin B₁₂, 15.4 ± 5.6 mg for iron, and 15.1 ± 6.4 mg for zinc. The percentage of women classified within the same ±1 quartile for energy intake by the 2 methods was 77.3%. There was moderate agreement between the 2 dietary methods, and no systematic bias was noted for energy, folate, vitamin B₁₂, and zinc. The deattenuated energy-adjusted correlation coefficients ranged from 0.41 (dietary folate equivalents) to 0.60 (folate). Significant correlations between biomarker and nutrient intakes were found for folate (r = 0.37, P <.01) and vitamin B12 (r = 0.27, P <.01). The electronic FFQ developed in the prese nt study is a relatively valid tool that was able to adequately assess and rank individuals according to their nutrient intakes.
- Description
- 7 page(s)
- Subject Keyword
- Biomarker
- Subject Keyword
- FFQ
- Subject Keyword
- Folate
- Subject Keyword
- Iron
- Subject Keyword
- Validation
- Subject Keyword
- Vitamin B12
- Subject Keyword
- Women
- Subject Keyword
- Zinc
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Statistics
- Identifier
- http://hdl.handle.net/1959.14/135131
- Identifier
- ISSN:0271-5317
- Identifier
- mq_res-ext-2-s2.0-79551635698
- Language
- eng
- Reviewed
List Of Titles
