Nutritional RequirementsNCT06074770
Study on Dietary Intake Levels of Iodine for 3-6 Years Old Pre-school Children
An observational study of Nutritional Requirements, run by Chen Wen at 1 site in China.
Trial summary
Iodine as an essential trace element for human, both excessive and insufficient intake would be harmful for human health. As susceptible population, children will be more sensitive to adverse effects caused by inadequate intake of iodine since they are at the peak of growth and development. Read more about this study
- Who is it for?
- Ages 3 to 6 yearsHealthy volunteers can take part
- Conditions the study is for
- Nutritional Requirements
- How many people
- 2,650 participants
- Where
- 1 siteChina
- Study dates
- 5 May 2023to 31 Dec 2026
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 3 to 6 years
- All sexes
- Healthy volunteers accepted
- Child
Study population: 3-6 years old pre-school children are the research subjects. They were recruited in Tianjin and Shandong.
Who may be able to join
- for children with mild malnutrition: hemoglobin <110g / L, or weight for age <P50 according to the Chinese 2009 child growth and development reference standard, or BMI z score <-1 according to the WHO Child Growth Assessment Software (version 3.2.2 ) ; have not been treated for thyroid disease; have not used amiodarone and other drugs (including iodine supplements) during the investigation; have no major diseases ,chronic diseases and family history.
- for children with good nutritional status: healthy,-1 <BMI z score <1; have not been treated for thyroid disease; have not used amiodarone and other drugs (including iodine supplements) during the investigation; have no major diseases ,chronic diseases and family history;
Who cannot join
- long-term low-protein; long-term low-heat energy malnutrition
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
China1 site, 1 recruiting
- Recruiting
Shandong Institute for Endemic Disease Control and Research
Yuncheng, Shandong
wen chen, 022-83336610, wenchen@tmu.edu.cn
ying ye, 022-83336717, yeying@tmu.edu.cn
About this study
Iodine as an essential trace element for human, both excessive and insufficient intake would be harmful for human health. As susceptible population, children will be more sensitive to adverse effects caused by inadequate intake of iodine since they are at the peak of growth and development. Meanwhile, there are few direct evidence to establish dietary intakes levels of iodine for 3-6 years old pre-school children.
Read the detailed description
This study plan to conduct iodine balance experiment by providing devised diet consist of different iodine contents, in order to simulate iodine equilibrium of iodine deficiency to iodine excess in children and find the lowest iodine requirement of iodine for pre-school children, then aim to provide data to establish recommend nutrient intake of iodine for 3-6-year-old pre-school children. On the other hand, this study will make use of natural geographic environment with high water iodine in China. The investigators will conduct big-scale epidemiologic study in areas with high water iodine levels in Shandong and areas with adequate iodine in Tianjin, to enroll pre-school children with various iodine intake levels. The investigators will collect 24-hour urine samples as well as dietary records to evaluate iodine intake levels, and detect thyroid volume and thyroglobulin to evaluate the effects of various iodine intake on pre-school children, aiming to find the lowest safe intake level of iodine and then establish the tolerable upper intake level (UL) of iodine for 3-6-year-old pre-school children. This study aims to define the RNI and UL of iodine for 3-6-year-old pre-school children, to provide data for revision of Chinese dietary intake levels of iodine, and to guide children safe and scientifical iodine fortification.
- Conditions
- Nutritional Requirements
- Being tested
- no intervention
- Keywords
- nutrient, dietary intake levels, pre-school children, iodine
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
no interventionOther
Natural exposure of iodine
What is being measured
The primary outcome is the main question the study is designed to answer.
urinary iodine concentration
μg/L
Measured: 2 weeks
diet iodine intake
μg/day
Measured: 2 weeks
urinary iodine excretion
μg/day
Measured: 2 weeks
thyroglobulin antibody
IU/mL
Measured: 2 weeks
salt iodine concentration
μg/L
Measured: 2 weeks
water iodine intake
μg/day
Measured: 2 weeks
thyroid volume
ml
Measured: 2 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Oct 2023
- Study start5 May 2023
- Primary completion31 Dec 2026 (estimated)
- Study completion31 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (29)Papers the sponsor has linked to this study.
- Other trials for Nutritional RequirementsStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 2,650 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Chen Wen
- Sponsor type
- University, hospital or other
- Collaborators
- Shandong Institute for Endemic Disease Control and Research
- Responsible party
- Sponsor-investigator, Chen Wen, Tianjin Medical University
- Investigators
- xiao ming Wang, Study chair, Shandong Institute for Endemic Disease Control and Researchdong An, Study chair, Tianjin Children's Hospitalfang Fang, Study chair, Tianjin Medical Universityna Sai, Study chair, Tianjin Medical University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06074770
- Sponsor's protocol ID
- NSFC-8227121511
- Status last verified
- Oct 2023
- First submitted
- 26 Sep 2023
- Last updated
- 10 Oct 2023
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Laurberg P, Cerqueira C, Ovesen L, Rasmussen LB, Perrild H, Andersen S, Pedersen IB, Carle A. Iodine intake as a determinant of thyroid disorders in populations. Best Pract Res Clin Endocrinol Metab. 2010 Feb;24(1):13-27. doi: 10.1016/j.beem.2009.08.013.
PubMed 20172467Zimmermann MB, Boelaert K. Iodine deficiency and thyroid disorders. Lancet Diabetes Endocrinol. 2015 Apr;3(4):286-95. doi: 10.1016/S2213-8587(14)70225-6. Epub 2015 Jan 13.
PubMed 25591468Li Y, Teng D, Ba J, Chen B, Du J, He L, Lai X, Teng X, Shi X, Li Y, Chi H, Liao E, Liu C, Liu L, Qin G, Qin Y, Quan H, Shi B, Sun H, Tang X, Tong N, Wang G, Zhang JA, Wang Y, Xue Y, Yan L, Yang J, Yang L, Yao Y, Ye Z, Zhang Q, Zhang L, Zhu J, Zhu M, Ning G, Mu Y, Zhao J, Shan Z, Teng W. Efficacy and Safety of Long-Term Universal Salt Iodization on Thyroid Disorders: Epidemiological Evidence from 31 Provinces of Mainland China. Thyroid. 2020 Apr;30(4):568-579. doi: 10.1089/thy.2019.0067. Epub 2020 Mar 24.
PubMed 32075540Sang Z, Chen W, Shen J, Tan L, Zhao N, Liu H, Wen S, Wei W, Zhang G, Zhang W. Long-term exposure to excessive iodine from water is associated with thyroid dysfunction in children. J Nutr. 2013 Dec;143(12):2038-43. doi: 10.3945/jn.113.179135. Epub 2013 Oct 9.
PubMed 24108132Lee SY, Pearce EN. Reproductive endocrinology: Iodine intake in pregnancy--even a little excess is too much. Nat Rev Endocrinol. 2015 May;11(5):260-1. doi: 10.1038/nrendo.2015.28. Epub 2015 Feb 24.
PubMed 25707780Bougma K, Aboud FE, Harding KB, Marquis GS. Iodine and mental development of children 5 years old and under: a systematic review and meta-analysis. Nutrients. 2013 Apr 22;5(4):1384-416. doi: 10.3390/nu5041384.
PubMed 23609774Pearce EN, Lazarus JH, Moreno-Reyes R, Zimmermann MB. Consequences of iodine deficiency and excess in pregnant women: an overview of current knowns and unknowns. Am J Clin Nutr. 2016 Sep;104 Suppl 3(Suppl 3):918S-23S. doi: 10.3945/ajcn.115.110429. Epub 2016 Aug 17.
PubMed 27534632Zimmermann MB, Jooste PL, Mabapa NS, Mbhenyane X, Schoeman S, Biebinger R, Chaouki N, Bozo M, Grimci L, Bridson J. Treatment of iodine deficiency in school-age children increases insulin-like growth factor (IGF)-I and IGF binding protein-3 concentrations and improves somatic growth. J Clin Endocrinol Metab. 2007 Feb;92(2):437-42. doi: 10.1210/jc.2006-1901. Epub 2006 Nov 21.
PubMed 17118996Black RE, Victora CG, Walker SP, Bhutta ZA, Christian P, de Onis M, Ezzati M, Grantham-McGregor S, Katz J, Martorell R, Uauy R; Maternal and Child Nutrition Study Group. Maternal and child undernutrition and overweight in low-income and middle-income countries. Lancet. 2013 Aug 3;382(9890):427-451. doi: 10.1016/S0140-6736(13)60937-X. Epub 2013 Jun 6.
PubMed 23746772Harika R, Faber M, Samuel F, Mulugeta A, Kimiywe J, Eilander A. Are Low Intakes and Deficiencies in Iron, Vitamin A, Zinc, and Iodine of Public Health Concern in Ethiopian, Kenyan, Nigerian, and South African Children and Adolescents? Food Nutr Bull. 2017 Sep;38(3):405-427. doi: 10.1177/0379572117715818. Epub 2017 Jul 6.
PubMed 28682645Lee J, Kim JH, Lee SY, Lee JH. Iodine status in Korean preschool children as determined by urinary iodine excretion. Eur J Nutr. 2014;53(2):683-8. doi: 10.1007/s00394-013-0558-y. Epub 2013 Jul 24.
PubMed 23881585Nakatsuka H, Watanabe T, Shimbo S, Sawatari H, Izumi K, Yaginuma-Sakurai K, Ikeda M. High iodine intake by preschool children in Miyagi prefecture, Japan. Environ Health Prev Med. 2014 Sep;19(5):330-8. doi: 10.1007/s12199-014-0394-6. Epub 2014 Jun 28.
PubMed 24972786Wang Y, Cui Y, Chen C, Duan Y, Wu Y, Li W, Zhang D, Li F, Hou C. Stopping the supply of iodized salt alone is not enough to make iodine nutrition suitable for children in higher water iodine areas: A cross-sectional study in northern China. Ecotoxicol Environ Saf. 2020 Jan 30;188:109930. doi: 10.1016/j.ecoenv.2019.109930. Epub 2019 Nov 11.
PubMed 31727496Chen W, Li X, Wu Y, Bian J, Shen J, Jiang W, Tan L, Wang X, Wang W, Pearce EN, Zimmermann MB, Carriquiry AL, Zhang W. Associations between iodine intake, thyroid volume, and goiter rate in school-aged Chinese children from areas with high iodine drinking water concentrations. Am J Clin Nutr. 2017 Jan;105(1):228-233. doi: 10.3945/ajcn.116.139725. Epub 2016 Dec 7.
PubMed 27927635Malvaux P, Beckers C, De Visscher M. Iodine balance studies in nongoitrous children and in adolescents on low iodine intake. J Clin Endocrinol Metab. 1969 Jan;29(1):79-84. doi: 10.1210/jcem-29-1-79. No abstract available.
PubMed 5762324
Study at a glance
From the registry record, last updated by the sponsor on 10 Oct 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Study on Dietary Intake Levels of Iodine for 3-6 Years Old Pre-school Children
- ClinicalTrials.gov ID
- NCT06074770
- Acronym / sponsor ID
- NSFC-8227121511
- Conditions
- Nutritional Requirements
- Keywords
- nutrient, dietary intake levels, pre-school children, iodine
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 2,650 participants (estimated)
- Lead sponsor
- Chen WenUniversity, hospital or other
- Collaborators
- Shandong Institute for Endemic Disease Control and Research
- Study start
- 5 May 2023 (actual)
- Primary completion
- 31 Dec 2026 (estimated)
- Study completion
- 31 Dec 2026 (estimated)
- First posted
- 10 Oct 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Iodine as an essential trace element for human, both excessive and insufficient intake would be harmful for human health. As susceptible population, children will be more sensitive to adverse effects caused by inadequate intake of iodine since they are at the peak of growth and development. Meanwhile, there are few direct evidence to establish dietary intakes levels of iodine for 3-6 years old pre-school children.
Detailed description
This study plan to conduct iodine balance experiment by providing devised diet consist of different iodine contents, in order to simulate iodine equilibrium of iodine deficiency to iodine excess in children and find the lowest iodine requirement of iodine for pre-school children, then aim to provide data to establish recommend nutrient intake of iodine for 3-6-year-old pre-school children. On the other hand, this study will make use of natural geographic environment with high water iodine in China. The investigators will conduct big-scale epidemiologic study in areas with high water iodine levels in Shandong and areas with adequate iodine in Tianjin, to enroll pre-school children with various iodine intake levels. The investigators will collect 24-hour urine samples as well as dietary records to evaluate iodine intake levels, and detect thyroid volume and thyroglobulin to evaluate the effects of various iodine intake on pre-school children, aiming to find the lowest safe intake level of iodine and then establish the tolerable upper intake level (UL) of iodine for 3-6-year-old pre-school children. This study aims to define the RNI and UL of iodine for 3-6-year-old pre-school children, to provide data for revision of Chinese dietary intake levels of iodine, and to guide children safe and scientifical iodine fortification.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
Who may qualify
- Ages
- 3 to 6 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child
- Study population
- 3-6 years old pre-school children are the research subjects. They were recruited in Tianjin and Shandong.
Key inclusion criteria (2 listed)
- for children with mild malnutrition: hemoglobin <110g / L, or weight for age <P50 according to the Chinese 2009 child growth and development reference standard, or BMI z score <-1 according to the WHO Child Growth Assessment Software (version 3.2.2 ) ; have not been treated for thyroid disease; have not used amiodarone and other drugs (including iodine supplements) during the investigation; have no major diseases ,chronic diseases and family history.
- for children with good nutritional status: healthy,-1 <BMI z score <1; have not been treated for thyroid disease; have not used amiodarone and other drugs (including iodine supplements) during the investigation; have no major diseases ,chronic diseases and family history;
Key exclusion criteria (1 listed)
- long-term low-protein; long-term low-heat energy malnutrition
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| no interventionNatural exposure of iodine | Other | – |
Primary outcome
urinary iodine concentration
Time frame: 2 weeks
μg/L
diet iodine intake
Time frame: 2 weeks
μg/day
urinary iodine excretion
Time frame: 2 weeks
μg/day
thyroglobulin antibody
Time frame: 2 weeks
IU/mL
salt iodine concentration
Time frame: 2 weeks
μg/L
water iodine intake
Time frame: 2 weeks
μg/day
thyroid volume
Time frame: 2 weeks
ml
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 10 Oct 2023.
- Background: PubMed 20172467Laurberg P, Cerqueira C, Ovesen L, Rasmussen LB, Perrild H, Andersen S, Pedersen IB, Carle A. Iodine intake as a determinant of thyroid disorders in populations. Best Pract Res Clin Endocrinol Metab. 2010 Feb;24(1):13-27. doi: 10.1016/j.beem.2009.08.013.
- Background: PubMed 25591468Zimmermann MB, Boelaert K. Iodine deficiency and thyroid disorders. Lancet Diabetes Endocrinol. 2015 Apr;3(4):286-95. doi: 10.1016/S2213-8587(14)70225-6. Epub 2015 Jan 13.
- Background: PubMed 32075540Li Y, Teng D, Ba J, Chen B, Du J, He L, Lai X, Teng X, Shi X, Li Y, Chi H, Liao E, Liu C, Liu L, Qin G, Qin Y, Quan H, Shi B, Sun H, Tang X, Tong N, Wang G, Zhang JA, Wang Y, Xue Y, Yan L, Yang J, Yang L, Yao Y, Ye Z, Zhang Q, Zhang L, Zhu J, Zhu M, Ning G, Mu Y, Zhao J, Shan Z, Teng W. Efficacy and Safety of Long-Term Universal Salt Iodization on Thyroid Disorders: Epidemiological Evidence from 31 Provinces of Mainland China. Thyroid. 2020 Apr;30(4):568-579. doi: 10.1089/thy.2019.0067. Epub 2020 Mar 24.
- Background: PubMed 24108132Sang Z, Chen W, Shen J, Tan L, Zhao N, Liu H, Wen S, Wei W, Zhang G, Zhang W. Long-term exposure to excessive iodine from water is associated with thyroid dysfunction in children. J Nutr. 2013 Dec;143(12):2038-43. doi: 10.3945/jn.113.179135. Epub 2013 Oct 9.
- Background: PubMed 25707780Lee SY, Pearce EN. Reproductive endocrinology: Iodine intake in pregnancy--even a little excess is too much. Nat Rev Endocrinol. 2015 May;11(5):260-1. doi: 10.1038/nrendo.2015.28. Epub 2015 Feb 24.
- Background: PubMed 23609774Bougma K, Aboud FE, Harding KB, Marquis GS. Iodine and mental development of children 5 years old and under: a systematic review and meta-analysis. Nutrients. 2013 Apr 22;5(4):1384-416. doi: 10.3390/nu5041384.
- Background: PubMed 27534632Pearce EN, Lazarus JH, Moreno-Reyes R, Zimmermann MB. Consequences of iodine deficiency and excess in pregnant women: an overview of current knowns and unknowns. Am J Clin Nutr. 2016 Sep;104 Suppl 3(Suppl 3):918S-23S. doi: 10.3945/ajcn.115.110429. Epub 2016 Aug 17.
- Background: PubMed 17118996Zimmermann MB, Jooste PL, Mabapa NS, Mbhenyane X, Schoeman S, Biebinger R, Chaouki N, Bozo M, Grimci L, Bridson J. Treatment of iodine deficiency in school-age children increases insulin-like growth factor (IGF)-I and IGF binding protein-3 concentrations and improves somatic growth. J Clin Endocrinol Metab. 2007 Feb;92(2):437-42. doi: 10.1210/jc.2006-1901. Epub 2006 Nov 21.
- Background: PubMed 23746772Black RE, Victora CG, Walker SP, Bhutta ZA, Christian P, de Onis M, Ezzati M, Grantham-McGregor S, Katz J, Martorell R, Uauy R; Maternal and Child Nutrition Study Group. Maternal and child undernutrition and overweight in low-income and middle-income countries. Lancet. 2013 Aug 3;382(9890):427-451. doi: 10.1016/S0140-6736(13)60937-X. Epub 2013 Jun 6.
- Background: PubMed 28682645Harika R, Faber M, Samuel F, Mulugeta A, Kimiywe J, Eilander A. Are Low Intakes and Deficiencies in Iron, Vitamin A, Zinc, and Iodine of Public Health Concern in Ethiopian, Kenyan, Nigerian, and South African Children and Adolescents? Food Nutr Bull. 2017 Sep;38(3):405-427. doi: 10.1177/0379572117715818. Epub 2017 Jul 6.
- Background: PubMed 23881585Lee J, Kim JH, Lee SY, Lee JH. Iodine status in Korean preschool children as determined by urinary iodine excretion. Eur J Nutr. 2014;53(2):683-8. doi: 10.1007/s00394-013-0558-y. Epub 2013 Jul 24.
- Background: PubMed 24972786Nakatsuka H, Watanabe T, Shimbo S, Sawatari H, Izumi K, Yaginuma-Sakurai K, Ikeda M. High iodine intake by preschool children in Miyagi prefecture, Japan. Environ Health Prev Med. 2014 Sep;19(5):330-8. doi: 10.1007/s12199-014-0394-6. Epub 2014 Jun 28.
- Individual participant dataSharing planned: No
Related trials for Nutritional Requirements
Recruiting
Adiposity and Iron Requirements in Pregnancy
Iron Deficiency Anemia of Pregnancy
Recruiting
Dietary Iron Requirements
Iron Absorption
RecruitingObservational study
Optimizing Nutrition and Milk (Opti-NuM) Project
Very Low Birth Weight Baby, Early Nutrition and the Preterm Infant
RecruitingObservational study
Protein Requirements After Bariatric Surgery
Obesity and Overweight, Bariatric Surgery (Gastric Bypass)
Active, not recruitingObservational study
Extreme Morphology and Metabolic Health
Skeletal Dysplasia
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
xiao ming Wang study chair
Shandong Institute for Endemic Disease Control and Research
dong An study chair
Tianjin Children's Hospital
fang Fang study chair
Tianjin Medical University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Nutritional Requirements, run by Chen Wen at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 10 Oct 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact wen Chen, Master (022-83336610, wenchen@tmu.edu.cn), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
urinary iodine concentration (time frame: 2 weeks). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT06074770, which also lists 29 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 10 Oct 2023.