Research paper
Development and validation of an iodine-specific FFQ to estimate iodine intake in Australian pregnant women.
Study answer
What this study found
I-FFQ shows moderate validity for iodine intake from food (r = 0.349, P < 0.001) and very strong validity when iodine supplements are included (r = 0.876, P < 0.001). Adequacy classification agreement improves from 66% (food alone) to 90% (food plus supplements) with kappa rising from 0.28 to 0.72. Reproducibility across pregnancy is strong (r = 0.622). Total iodine intake estimated by I-FFQ correlates with 24 h UIE and 24 h UIC, but not with spot UIC. Supplement users show moderate correlations with UIE/UIC; non-supplement users show weaker or no correlation. Iodised salt use raises UIE but…
- Study & population
- Observational validation study of an iodine-specific FFQ (I-FFQ) in pregnant Australian women.
- Key limitation
- Small, single-country sample; observational validation; iodine intake from iodised salt not quantified; only one 24 h urine and one spot urine sample; PABA not used to check collection completeness; thyroperoxidase not measured; Tg antibodies measured but autoimmunity not fully excluded; results may not generalize…
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Open PDFOriginal abstract
Adequate iodine is important during pregnancy to ensure optimal growth and development of the offspring. We validated an iodine-specific FFQ (I-FFQ) for use in Australian pregnant women. A forty-four-item I-FFQ was developed to assess iodine intake f…