Maternal Iodine Intake and Offspring Attention-Deficit/Hyperactivity Disorder: Results from a Large Prospective Cohort Study.

Nutrients · 2017 · PMC5707711 · PMID 29137191

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borderline significantno p-value reported

However, the associations with ADHD outcomes were robust and remained borderline significant for participants with a low iodine intake from food who initiated iodine supplement use in the first trimester.

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did not reach statistical significanceno p-value reported

The negative effect associated with a low iodine intake (<200 μg/day) on ADHD symptoms was primarily seen in the inattention subscale ( p overall < 0.001), and it did not reach statistical significance for the hyperactivity subscale ( p overall = 0.19).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.