Relationship between Iodine Nutrition and Thyroid Function in Early Pregnan-cy and Pregnancy Outcomes
- VernacularTitle:孕早期碘营养与甲状腺功能及妊娠结局相关性研究
- Author:
Yushan CHENG
1
,
2
;
Jinsong GAO
;
Lili GAO
Author Information
1. 中国医学科学院北京协和医学院北京协和医院妇产科国家妇产疾病临床医学研究中心,北京 100730
2. 北京市朝阳区保健院妇产科,北京 100021
- Keywords:
Iodine nutrition;
Urine iodine;
Thyroid function;
Adverse pregnancy outcomes;
Risk factors
- From:
Journal of Practical Obstetrics and Gynecology
2024;40(10):823-827
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the correlation between iodine nutrition level and thyroid function in women in early pregnancy and to analyze the risk factors associated with adverse pregnancy outcomes.Meth-ods:A retrospective analysis of 566 early pregnant women who underwent routine prenatal examinations from Oc-tober 2020 to May 2022 in Peking Union Medical College Hospital.Their general clinical information,urinary iodine concentration and thyroid function were collected to determine the iodine nutritional status of pregnant women in early pregnancy.According to different iodine nutrient levels,they were divided into the iodine deficiency group(UIC＜150 μg/g),iodine beyond appropriate group(250 μg/g ≤ UIC＜500 μg/g),iodine excess group(UIC ≥500 μg/g),iodine appropriate group(150 μg/g≤UIC＜250 μg/g)and iodine nutrition abnormality group(inclu-ding iodine deficiency,iodine beyond appropriate,and iodine excess).The incidence of thyroid disease was com-pared and analyzed.Logistic regression analysis was used to analyze the risk factors of the adverse pregnancy outcomes(including hypertensive disorders in pregnancy,gestational diabetes mellitus,preterm delivery,miscar-riage,and low birth weight infants).Results:①The median urinary iodine/creatinine ratio of the 566 pregnant women in early pregnancy was 99 μg/g,indicating an overall iodine deficiency level.The abnormal rate of iodine nutrition was 82.9％(including 73.0％in iodine deficiency group,7.4％in iodine beyond appropriate group and 2.5％in iodine excess group),but only 17.1％in appropriate group.②There was no significant difference in the incidence of thyroid dysfunction(including hypothyroidism,subclinical hypothyroidism,and simple positive TPO-Ab)among groups with different levels of iodine nutrition(P＞0.05).However,the incidence of thyroid dys-function in pregnant women with iodine nutrition abnormalitieswas higher than that in pregnant women with moder-ate iodine and the difference was statistically significant(20.3％vs.11.3％,x2=4.198,P=0.04).③Multivariate Logistic regression analysis showed that age(≥35 years),body mass index(≥24 kg/m2)and abnormal iodine nutrition were independent risk factors of the adverse pregnancy outcomes(OR＞1,P＜0.05).Conclusions:The rate of abnormal iodine nutrition in early pregnancy is more than 80％,indicating an overall iodine deficiency state Abnormal iodine nutrition is a risk factor of adverse pregnancy outcomes.It is recommended to monitor the iodine nutrition level of pregnant women in early pregnancy,provide iodine supplementation or low iodine diet according to different iodine nutrition levels,correct abnormal iodine nutrition during pregnancy,and strengthen health educa-tion intervention to improve pregnancy outcomes.
