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Sponsored by: |
Zhejiang University |
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Information provided by: | Zhejiang University |
ClinicalTrials.gov Identifier: | NCT00505479 |
Iodine is an essential component of thyroid hormone, which is necessary for many metabolic processes as well as the maturation of the CNS. Deficiencies of iodine have deleterious effects on both pregnant women and infants. The iodine status of the population after implementation of the universal salt iodization program in Zhejiang province has not been known. This study was to determine whether pregnant women show evidence of iodine deficiency, and to examine the correlation between maternal urine iodine concentration and newborn thyroid function.
Condition |
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Congenital Hypothyroidism Pregnancy Iodine Deficiency |
Study Type: | Observational |
Study Design: | Screening, Longitudinal, Random Sample, Prospective Study |
Study Start Date: | May 2007 |
Estimated Study Completion Date: | May 2010 |
Iodine is an essential component of thyroid hormone, which is necessary for many metabolic processes as well as the maturation of the CNS. Deficiencies of iodine have deleterious effects on both pregnant women and infants. The iodine status of the population after implementation of the universal salt iodization program in Zhejiang province has not been known. This study was to determine whether pregnant women show evidence of iodine deficiency, and to examine the correlation between maternal urine iodine concentration and newborn thyroid function.
Healthy women at 12 weeks’ gestation and over from four different areas in Zhejiang province were enrolled to participate this program from May 2007 to May 2010. Women consented to provide urine samples and salt samples during pregnancy (12, 16, 24 weeks’ gestation and before delivery), and give permission to access their newborn’s TSH value. Urinary iodine concentration (UIC) was determined by ammonium persulfate digestion microplate method, and TSH was determined by a time resolved fluoro-immunoassay (TRFIA). The diagnostic standard for congenital hypothyroidism was: TSH ≥ 20 mU/L and declined FT4 levels. Compare the correlation to effects with different level of iodine content in salt, maternal UIC and neonatal TSH. Investigate the optimal level of iodine content in salt in different areas in ZheJiang province.
Ages Eligible for Study: | 20 Years to 40 Years |
Genders Eligible for Study: | Female |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
Exclusion Criteria:
Contact: Zhengyan Zhao, M.D. | 008657187061007 | zhaozy@zju.edu.cn |
China, Zhejiang | |
Children's Hospital Zhejiang University School of Medicine | Recruiting |
Hangzhou, Zhejiang, China, 310003 | |
Contact: Zhengyan Zhao, M.D. 008657187061007 zhaozy@zju.edu.cn | |
Principal Investigator: Zhengyan Zhao, M.D. |
Study Director: | zhengyan Zhao, M.D. | Children's Hospital Zhejiang University School of Medicine |
Study ID Numbers: | G20020584 |
Study First Received: | July 20, 2007 |
Last Updated: | July 20, 2007 |
ClinicalTrials.gov Identifier: | NCT00505479 |
Health Authority: | China: Ministry of Health |
Congenital Hypothyroidism pregnancy iodine deficiency |
Dwarfism Bone Diseases, Endocrine Cretinism Endocrine System Diseases Bone Diseases Congenital hypothyroidism Musculoskeletal Diseases |
Genetic Diseases, Inborn Congenital Hypothyroidism Bone Diseases, Developmental Iodine Hypothyroidism Endocrinopathy Thyroid Diseases |