Dietary Iodine from Interview-Based Semi-Quantitative Food Frequency Questionnaire:
Correlation with 24h Dietary Recall
Abstract:
Iodine deficiency is a major public health problem throughout
the world. Malaysia's latest IDD survey in 2008 showed that 12.5% of the school
children had urinary iodine above adequate requirement (>200 μg/L),
where 7.6% were above the adequate value (200-299 μg/L) and 4.9% were excessive
(>300 μ/L) particularly in the Federal Territory of Putrajaya
(19.9%) and Sabah (16.6%). Socio-demography, environment and dietary are three
main factors contributing to an increase in the prevalence of high urinary iodine
in a population. Therefore, this study was conducted to validate an interview-based
semi-quantitative Food Frequency Questionnaire (FFQ) with 24h dietary recall
method on iodine nutrition for use in future studies in Malaysia particularly
among school children. A total of 35 healthy euthyroid consented school children
in the Federal Territory of Putrajaya were enrolled in the study. Each subject
completed 24h dietary recall, followed by an interview-based food frequency
questionnaire to assess dietary iodine intake. A standardized coloured book
containing photos of food high in iodine and household measuring tools were
used to help the respondents in answering the questions. Daily iodine intake
was calculated for each participant in both FFQ and 24h dietary recall. Median
daily iodine intake was 423.95±225.49 μg/L from the interview-based
FFQ and 436.45±217.37 μg/L in the 24h dietary recall. The iodine
content from the 24h dietary recall was strongly correlated with the iodine
content from the interview-based FFQ where r = 0.954. It is concluded that the
semi-quantitative FFQ is sufficiently reliable to inquire the daily iodine intake
of school children.
How to cite this article
Salina Md. Taib and Zaleha Md. Isa, 2013. Dietary Iodine from Interview-Based Semi-Quantitative Food Frequency Questionnaire:
Correlation with 24h Dietary Recall. Pakistan Journal of Nutrition, 12: 688-691.
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