4.7 Article

Maternal Iodine Intake and Neurodevelopment of Offspring: The Japan Environment and Children's Study

期刊

NUTRIENTS
卷 14, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/nu14091826

关键词

iodine intake; food frequency questionnaire; pregnancy; neurodevelopment; birth cohort study; Ages and Stages Questionnaire Third Edition

资金

  1. Ministry of the Environment, Japan

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Inadequate maternal iodine intake during pregnancy may have negative effects on fetal brain development and neurodevelopment in offspring. Lower iodine intake is associated with an increased risk of delayed fine motor and problem-solving abilities in children at 1 and 3 years old.
Inadequate maternal iodine intake affects thyroid function and may impair fetal brain development. This study investigated the association between maternal iodine intake during pregnancy and neurodevelopmental delay in offspring at 1 and 3 years of age using a nationwide birth cohort: the Japan Environment and Children's Study. We assessed dietary iodine intake during pregnancy using a food frequency questionnaire and child neurodevelopment using the Japanese translation of the Ages and Stages Questionnaire, Third Edition. The risk of delay (score below the cut-off value) for fine motor domain at 1 year of age was increased in the lowest quintile iodine intake group compared with the fourth quintile iodine intake group. The risk of delay for problem-solving at 1 year of age was increased in the lowest and second quintile iodine intake group and decreased in the highest quintile iodine intake group. The risk of delay for communication, fine motor, problem-solving, and personal-social domains at 3 years of age was increased in the lowest and second quintile iodine intake group compared with the fourth quintile iodine intake group, while the risk of delay for fine motor and problem-solving domains was decreased in the highest quintile iodine intake group. Low iodine intake levels in pregnancy may affect child neurodevelopment.

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