scholarly journals Iodine Nutritional Status and Related Factors among Chinese School-Age Children in Three Different Areas: A Cross-Sectional Study

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1404
Author(s):  
Xiaoyun Shan ◽  
Changqing Liu ◽  
Xiaoyan Luo ◽  
Yan Zou ◽  
Lichun Huang ◽  
...  
Keyword(s):  
Vitamin A ◽  
Nutritional Status ◽  
Iodine Deficiency ◽  
Urinary Iodine ◽  
Thyroid Stimulating Hormone ◽  
School Age Children ◽  
Urinary Iodine Concentration ◽  
School Age ◽  
Related Factors ◽  
Cross Sectional

We evaluated the iodine nutritional status and related factors among school-age children based on the 2016 National Nutrition and Health Surveillance of Children and Lactating Women; 3808 children from Hebei, Guangxi, and Zhejiang province were included in the study. Urinary iodine concentration (UIC), thyroid-stimulating hormone (TSH), body mass index (BMI), vitamin A (VA), and vitamin D (VD) were measured. The abnormal rate of UIC and TSH were assessed. Relationships between UIC/TSH and the possible factors were analyzed. The overall median UIC was 185.14 µg/L, and the median UIC of children aged 8–10 was 164.60 µg/L. Prevalence of iodine deficiency and excess was 13.84% and 14.36%, respectively, and 12.87% of children showed TSH excess. UIC, as well as the abnormal rates of iodine deficiency (ID) and TSH, were significantly different among the three provinces. The median UICs and excess rates increased with age, reaching 211.45 µg/L and 21.35% at age of 14~, while TSH showed the opposite trend. Overweight children tended to have lower UIC and higher TSH. Higher UIC and TSH were found in VA sufficient group (p < 0.01). Further, the VD deficient group had a higher TSH compared to the sufficient group (p < 0.01). Moreover, UI and TSH distribution was obviously different among different vitamin A/D status (p < 0.05). Although the median UIC of school-age children was optimal, there were pockets of inadequate and excessive UI in the three provinces. Compared to the national IDD monitoring results in 2014, the iodine nutritional status of children was greatly improved. Considerations of region, age, BMI, VA, or VD are needed in the future iodine evaluation and surveillance.

scholarly journals Thyroid stimulating hormone isn’t a sensitive indicator of iodine nutritional status in schoolchildren

2016 ◽  
Vol 14 (3) ◽  
pp. 350
Author(s):  
Renata De Oliveira Campos ◽  
Joaquim Custódio Silva Júnior ◽  
Elton Estrela Ramos
Keyword(s):  
Public Schools ◽  
Nutritional Status ◽  
Filter Paper ◽  
Urinary Iodine ◽  
Iodine Concentration ◽  
Thyroid Stimulating Hormone ◽  
Urinary Iodine Concentration ◽  
Iodine Nutrition ◽  
Cross Sectional ◽  
Stimulating Hormone

<p><strong><em>Introduction:</em></strong><em> iodine deficiency </em><em>disorders (IDD)</em><em> </em><em>are most common cause of preventable brain damage, mental retardation and stunted growth in children</em><em> worldwide. Several indicators are complementary to urinary iodine concentration (UIC) for assessing iodine nutritional status, as thyroid size, thyroglobulin (Tg) and thyroid stimulating hormone (TSH) concentrations in the blood.</em><strong><em> Objective:</em></strong><em> </em><em>analyze TSH in filter paper blood values and correlate with UIC in schoolchildren from public school at state of Bahia, Brazil</em><em>. <strong>Methodology: </strong></em><em>cross-sectional study was conducted in 880 schoolchildren aged 6-14 years, randomly selected, of public schools in five cities of four micro-regions of Bahia between October 2013 and September 2014. TSH was analyzed in filter-paper blood and UIC were measured by adapted Sandell-Kolthoff reaction. </em><strong><em>Results:</em></strong><em> 880 blood samples on filter-paper were analyzed for TSH. The reference range previously established is 0.72 to 6.0 </em><em>μ</em><em>UI/mL</em><em>. Results of this research TSH dosage ranged from 0.24 </em><em>μ</em><em>IU/L to</em><em> 7.71 </em><em>μ</em><em>IU/L,</em><em> with a mean of 1.01±0.55 </em><em>μ</em><em>UI/L</em><em> and median 0.89 </em><em>μ</em><em>UI/L</em><em>. Only one child presented TSH greater than 6.0 (7.71 </em><em>μ</em><em>IU/L); however, results of urinary iodine were consistent with a more than adequate nutrition iodine (243.70</em><em>μ</em><em>g/L). There’ no correlation between TSH and UIC (r= 0.115; p= 0.002)</em><em>.</em><em> </em><strong><em>Conclusion:</em></strong><em>  in the present study, schoolchildren showed low values of TSH, but the mean UIC was indicative of adequate iodine nutrition</em><em>.</em><em></em></p>

scholarly journals Agreement between markers of population iodine status in classifying iodine status of populations: a systematic review

2019 ◽  
Vol 110 (4) ◽  
pp. 949-958 ◽  
Author(s):  
Molla Mesele Wassie ◽  
Philippa Middleton ◽  
Shao Jia Zhou
Keyword(s):  
Systematic Review ◽  
Urinary Iodine ◽  
Iodine Concentration ◽  
Thyroid Stimulating Hormone ◽  
School Age Children ◽  
Urinary Iodine Concentration ◽  
School Age ◽  
Iodine Status ◽  
Goiter Prevalence ◽  
Reference Markers

ABSTRACT Background Population iodine deficiency is indicated by >3% of the population with newborn thyroid-stimulating hormone (TSH) concentration >5 mIU/L, median urinary iodine concentration (MUIC) <100 µg/L, or >5% prevalence of goiter in school-age children. However, the agreement between these population markers has not been systematically investigated. Objective To assess the agreement between TSH, MUIC, and goiter as markers of population iodine status. Methods We performed a systematic search for studies published on PubMed, Scopus, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Embase, and PsycINFO up to 29 October, 2018. Studies assessing iodine status in the population using the TSH marker and either MUIC or goiter prevalence in school-age children were included. The agreement between markers in classifying iodine status of the population was assessed. The sensitivity and specificity of the TSH marker was determined against MUIC and goiter prevalence as the reference markers. Results Of 17,435 records identified by the search strategy, 57 eligible studies were included in the review. The agreement between markers in classifying the iodine status of populations into the same category was 65% for TSH and MUIC, and 83% for TSH and goiter prevalence. The TSH marker had a sensitivity of 0.75 and specificity of 0.53 when compared with MUIC, and 0.86 and 0.50 when compared with goiter prevalence. Conclusions The TSH marker has a better agreement with goiter prevalence than MUIC when classifying the iodine status of populations. Re-evaluation of the current criteria for classifying the iodine status of populations using the TSH marker is warranted. This systematic review was registered at PROSPERO (http://www.crd.york.ac.uk/prospero/) as CRD42018091247.

scholarly journals Iodine Status of School Age Children 6-12 Years in Umuahia South LGA of Abia State, Nigeria

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
A.D. Oguizu ◽  
J.O. Nwagwu
Keyword(s):  
Nutrition Education ◽  
Iodine Deficiency ◽  
School Children ◽  
Urinary Iodine ◽  
Food Habit ◽  
Iodized Salt ◽  
School Age Children ◽  
Urinary Iodine Concentration ◽  
School Age ◽  
Iodine Status

Background: Iodine deficiency disorders have continued to be a significant health problem in some Nigerian communities despite universal salt iodization. Objective: This study was designed to assess the iodine status of school age children (6-12 years) in Umuahia South LGA of Abia State, Nigeria. Methods: A total of 414 school children were studied. Urine samples were obtained from 84 school children, 30 males and 54 females. The background and socio-economic information, food habit and dietary intake of the respondents were determined using validated questionnaires. Urinary iodine concentration analysis, using Sandell-Kolthoff reaction was used to determine the iodine status of the children. Chi-square was used to determine the relationship between urinary iodine status of the children and the socio-economic characteristics of their parents. Results: More than half (58.7%) of the children were females while 40.5% were males. About a quarter of the children (40.1%) were 9-10 years, 23.4% were 11-12 years while 36.5% were 6-8 years. Most of the respondents (72.2%) were aware of iodized salt; 14.3% heard about iodized salt from friends, 41.8% heard from the media while 13% heard about iodized salt from the market. Majority of the respondents (94.4%) claimed they consume iodized salt while 4.9% said they use salts that were measured in cups which was not iodized salt. The study revealed that 54.3% of the school children had optimal iodine status while 35.7% had mild iodine deficiency which was higher in males (46.7%) than in females (29.6%). About 5.6% of the respondents had grade 1 goiter. There was a significant association (p< 0.05) between urinary iodine status of the school children and educational status of their fathers’, mothers’, parents’ occupation and income level of fathers. Conclusion: Nutrition education should be aimed at mothers, caregivers, and school children to promote consumption of iodine rich foods.

scholarly journals Assessment of iodine status among school age children and pregnant women of Belarus in 2017–2018

2018 ◽  
Vol 14 (3) ◽  
pp. 149-155
Author(s):  
Tatiana V. Mokhort ◽  
Sergei V. Petrenko ◽  
Boris Y. Leushev ◽  
Ekaterina V. Fedorenko ◽  
Natalia D. Kolomiets ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Iodine Deficiency ◽  
Urinary Iodine ◽  
Thyroid Volume ◽  
Iodine Concentration ◽  
School Age Children ◽  
Normative Values ◽  
Urinary Iodine Concentration ◽  
School Age ◽  
Iodine Sufficiency

Background. Despite the measures taken by the Government of Belarus, the problem of iodine deficiency among the population remains actual. Aims. To determine iodine sufficiency in children and pregnant women living in Belarus. Materials and methods. The study included 873 schoolchildren aged 9–12 years of both sexes, of which 650 children were in regular schools, and the remaining children in boarding schools. A separate group consisted of 700 practically healthy pregnant women (during gestation from 16 to 36 weeks). Questioning, determination of urinary iodine concentration and thyroid volume with ultrasound was carried out. Results. Urine iodine median was 191 µg/L in the 873 children in 16 regions of Belarus. Thyroid volume corresponds to the normative values in children. According to the survey, 81% of households used iodized salt, constantly – 46%. Indicator of iodine sufficiency of 700 pregnant women (median urinary iodine concentration was 121 µg /l) is a non-optimal for this population group. Conclusions. Currently adequate iodine supplementation in school age children has been achieved. The prevalence of thyroid gland diseases caused by iodine deficiency in children decreased significantly. In pregnant women iodine supply is still insufficient.

scholarly journals Iodine status of school age children in the two hilly districts Dhankuta and Tehrathum of Eastern Nepal

2013 ◽  
Vol 1 (1) ◽  
pp. 38-41
Author(s):  
AK Nepal ◽  
S Gautam ◽  
S Khatiwada ◽  
PR Shakya ◽  
B Gelal ◽  
...  
Keyword(s):  
School Children ◽  
Urinary Iodine ◽  
Iodine Concentration ◽  
Cross Sectional Study ◽  
School Age Children ◽  
Urinary Iodine Concentration ◽  
Population Parameter ◽  
School Age ◽  
Cross Sectional ◽  
Iodine Status

Background: Iodine deficiency remains a significant health problem in developing countries, including Nepal.   Objective: This study was conducted to measure the iodine status of school children in two districts Dhankuta and Tehrathum of Eastern Nepal by estimating median urinary iodine concentration (UIC) as a population parameter in the school children. Materials and Methods: This cross-sectional study was conducted from August 2010 to July 2011 in school children (6-12 years of age) of two hilly districts of Eastern Nepal, Dhankuta and Tehrathum. A total of 154 school age children from the two districts were chosen for the study after obtaining written consent from their guardians and school authority. UIC was estimated in these school children by ammonium persulphate digestion microplate method. Results: Among the school age children selected for the study median inter-quartile range (IQR) of urinary iodine in Dhankuta (n=63) and Tehrathum (n=91) districts were 214.04 (126.44; 323.0) μg/L and 252.34 (161.81; 301.63) μg/L. No significant differences were observed between the median UIC of these two districts (p=0.235). Among the school children in Dhankuta districts 2(3.2%) were severely deficient, 4(6.3%) were moderately deficient and 6(9.5%) were mildly deficient. In Tehrathum district 2(2.2%) were moderately deficient and 5(5.5%) were mildly deficient. Conclusion: The present study showed improved iodine status with optimal levels of median urinary iodine concentration in the two districts, Dhankuta and Tehrathum of Eastern Nepal. Regular monitoring of population median urinary iodine concentration is recommended for sustainable optimal iodine nutrition.DOI: http://dx.doi.org/10.3126/stcj.v1i1.7986 Sunsari Technical College Journal Vol.1(1) 2012 38-41

scholarly journals State of iodine supply of children with chronic somatic diseases

2021 ◽  
pp. 13-18
Author(s):  
N.S. Shevchenko ◽  
◽  
H.О. Shlieienkova ◽  
K.V. Voloshyn ◽  
T.V. Zimnytska ◽  
...  
Keyword(s):  
Iodine Deficiency ◽  
Urinary Iodine ◽  
School Age Children ◽  
Urinary Iodine Excretion ◽  
Urinary Iodine Concentration ◽  
School Age ◽  
Digestive Diseases ◽  
Iodine Supply ◽  
Iodine Excretion ◽  
Somatic Diseases

One of the most common conditions resulting from micronutrient deficiency is iodine deficiency. Purpose — to evaluate the current state of iodine supply in schoolchildren living in the North-Eastern region of Ukraine, including children with digestive diseases and inflammatory joint diseases. Materials and methods. Target group: 86 people (11.8±2.71 years), which included patients with digestive diseases (DD) (26.7%) and juvenile idiopathic arthritis (JIA) (60.5%). Methods: dietary iodine intake evaluation by urinary iodine concentration (Sandell–Kolthoff reaction), followed by calculation of the median. Results. Median urinary iodine excretion was at the lower normal range and amounted to 104.98 μg/l [QR: 59.8; 180.1] in the examined children. Only 51.2% of children had adequate iodine provision; mild iodine deficiency (ID) was diagnosed in 29.1% (Ме=81,91μg/l [QR: 64.26; 90.58]); moderate — 17.4% (Ме=36,19 μg/l [QR: 33.54; 42.24]); severe — in 2.3% of the surveyed (Ме 14,02 μg/l [QR: 12.34; 15.70]). The median urinary iodine excretion in children with somatic diseases was significantly lower than in children of the control group and amounted to 97.26 μg/l [QR 53.7; 148.3] versus 183.71 μg/l [QR 104.4; 287.4], (p=0.003). Conclusions. School-age children have a high incidence of iodine deficiency (51.2%). Often encountered in childhood diseases (DD and JIA) are accompanied by insufficiency of iodine supply. The research was carried out in accordance with the principles of the Helsinki declaration. The study protocol was approved by the Local Ethics Committee of all participating institution. The informed consent of the patient was obtained for conducting the studies. No conflict of interest was declared by the author. Key words: iodine deficiency, school-age children, the level of iodine excretion.

scholarly journals Excessive intake of iodine and low prevalence of goiter in school age children five years after implementation of national salt iodization in Shebedino woreda, southern Ethiopia

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Elilta Elias ◽  
Workneh Tsegaye ◽  
Barbara J. Stoecker ◽  
Tafere Gebreegziabher
Keyword(s):  
Iodine Deficiency ◽  
Primary Schools ◽  
Urinary Iodine ◽  
Public Health Problem ◽  
Iodine Concentration ◽  
School Age Children ◽  
Southern Ethiopia ◽  
Urinary Iodine Concentration ◽  
School Age ◽  
Salt Iodization

Abstract Background Iodine is a trace element required for the synthesis of thyroid hormones. The multiple effects of iodine deficiency on human health are called iodine deficiency disorders (IDDs). IDDs have been common nutritional problems in Ethiopia. In 2012, Ethiopia launched a national salt iodization program to address IDDs. The objective of this study was to assess the effects of this program after 5 years by measuring urinary iodine concentration (UIC) and prevalence of goiter in school age children as well as household salt iodine concentration (SIC). Methods A school-based cross-sectional design was employed. After ethical approval, 408 children from eight randomly selected primary schools provided urine samples. UIC was analyzed by inductively coupled plasma mass spectrophotometry (ICP-MS). A 10 g salt sample was collected from each household of a sampled child. SIC was analyzed with a digital electronic iodine checker (WYD, UNICEF) and goiter was assessed by palpation. Results The mean (±SD) age of the children was 9 ± 2 years. The prevalence of goiter was 4.2% and no child had grade 2 goiter. The median (IQR) UIC was 518 (327, 704) μg/L and UIC ranged from 3.1 to 2530 μg/L. Of the salt samples, 15.6% were not adequately iodized (< 15 ppm), 39.3% were adequately iodized (≥15 to ≤40 ppm), and 45.1% were > 40 ppm. SIC ranged from 4.2 to 195 ppm. Of the mothers, 92% said iodized salt prevents goiter and 8% mentioned prevents mental retardation. Conclusions In 2017 iodine deficiency was no longer a public health problem in the study area. However, the high variability in UIC and SIC and excessive iodine intake are of great concern. It is vital to ensure that salt is homogenously iodized at the production site before being distributed to consumers.

scholarly journals Assessment of Dietary Iodine Intake in School Age Children: The Cross-Sectional ANIVA Study

Nutrients ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1884 ◽  
Author(s):  
María Morales-Suárez-Varela ◽  
Isabel Peraita-Costa ◽  
Agustín Llopis-Morales ◽  
Agustín Llopis-Gonzalez
Keyword(s):  
Thyroid Hormones ◽  
Iodine Deficiency ◽  
Dairy Products ◽  
Iodine Intake ◽  
School Age Children ◽  
School Age ◽  
Nutritional Adequacy ◽  
Cross Sectional ◽  
The World ◽  
Important Health

Iodine deficiency is one of the most important health problems in the world. It intervenes in the synthesis of thyroid hormones, which carry out important functions, so that a deficit of this mineral causes alterations of different kinds such as those related to growth. The objective of the present study was to know the prevalence of iodine deficit in the diet of Valencian children from 6 to 8 years old and their relationship with anthropometry. The analysis of the dietary intake was carried out through questionnaires. Thirteen schools participated in the study. The sample studied consists of 661 school children belonging to the Valencian Community, between 6 and 8 years of age: 298 boys and 363 girls. 79.12% of the children did not meet recommended daily iodine intakes. When comparing the groups of girls and boys with an inadequate intake, in general, girls show worse nutritional adequacy. When comparing the groups of girls and boys with sufficient iodine intake, no statistically significant differences were observed. No immediate effects of iodine deficiency on children’s anthropometry were observed. Intake of dairy products, fish and iodized salt is recommended, since they can contribute to the diet the iodine required to avoid a deficiency.

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