scholarly journals More than adequate iodine intake may increase subclinical hypothyroidism and autoimmune thyroiditis: a cross-sectional study based on two Chinese communities with different iodine intake levels

2011 ◽  
Vol 164 (6) ◽  
pp. 943-950 ◽  
Author(s):  
Xiaochun Teng ◽  
Zhongyan Shan ◽  
Yanyan Chen ◽  
Yaxin Lai ◽  
Jiashu Yu ◽  
...  
Keyword(s):  
Subclinical Hypothyroidism ◽  
Thyroid Autoimmunity ◽  
Urinary Iodine ◽  
Cross Sectional Study ◽  
Iodine Intake ◽  
Health Concern ◽  
Thyroid Peroxidase ◽  
Sectional Study ◽  
Cross Sectional ◽  
Chinese Populations

ObjectiveWith the introduction of iodized salt worldwide, more and more people are exposed to more than adequate iodine intake levels with median urinary iodine excretion (MUI 200–300 μg/l) or excessive iodine intake levels (MUI >300 μg/l). The objective of this study was to explore the associations between more than adequate iodine intake levels and the development of thyroid diseases (e.g. thyroid dysfunction, thyroid autoimmunity, and thyroid structure) in two Chinese populations.DesignA population-based cross-sectional study was conducted in two areas in which people are exposed to different levels of iodine intake (Rongxing, MUI 261 μg/l; Chengshan, MUI 145 μg/l). A total of 3813 individuals were recruited by random sampling. Thyroid hormones, thyroid autoantibodies in serum, and iodine levels in urine were measured. B-mode ultrasonography of the thyroid was also performed for each participant.ResultsThe prevalence of subclinical hypothyroidism was significantly higher for subjects who live in Rongxing than those who live in Chengshan (5.03 vs 1.99%, P<0.001). The prevalence of positive anti-thyroid peroxidase antibody (TPOAb) and positive anti-thyroglobulin antibody (TgAb) was significantly higher for subjects in Rongxing than those in Chengshan (TPOAb: 10.64 vs 8.4%, P=0.02; TgAb: 10.27 vs 7.93%, P=0.01). The increase in thyroid antibodies was most pronounced in the high concentrations of TPOAb (TPOAb: ≥500 IU/ml) and low concentrations of TgAb (TgAb: 40–99 IU/ml) in Rongxing.ConclusionsMore than adequate iodine intake could be a public health concern in terms of thyroid function and thyroid autoimmunity in the Chinese populations.

Urinary iodine excretion and individual iodine supplementation among elderly subjects: A cross-sectional investigation in the commune of Randers, Denmark

1995 ◽  
Vol 132 (2) ◽  
pp. 171-174 ◽  
Author(s):  
Klaus M Pedersen ◽  
Eigil Iversen ◽  
Peter Laurberg
Keyword(s):  
Urinary Iodine ◽  
Cross Sectional Study ◽  
Iodine Intake ◽  
Elderly Subjects ◽  
Urinary Iodine Excretion ◽  
Sectional Study ◽  
Cross Sectional ◽  
Iodine Supplementation ◽  
Median Level ◽  
Iodine Excretion

Pedersen KM, Iversen E, Laurberg P. Urinary iodine excretion and individual iodine supplementation among elderly subjects. A cross-sectional investigation in the commune of Randers, Denmark. Eur J Endocrinol 1995;132:171–4. ISSN 0804–4643 Several studies have demonstrated that the iodine intake is relatively low in Denmark. However, the results are difficult to interpret because no information has been given on the frequency of individual iodine supplementation. We performed a cross-sectional study of elderly subjects living in the commune of Randers, Denmark. Urinary iodine excretion was measured in the 423 participants (185 males, 238 females) and a careful history was taken on any possible intake of supplementary iodine. The median urinary iodine excretion was 48.3 μg/g creatinine for the whole population (40.8 μg/g creatinine in males, 53.2 μg/g creatinine in females). In the part of the population that did not take iodine supplementation (46.7%) the median value was 36.1 μg/g creatinine (males 33.8; females 38.8). Regular iodine supplementation taken as an iodine-containing vitamin/mineral tablet was found in 30.8% of the population. This increased the urinary iodine excretion to a median level of 80.5 μg/g creatinine (males 62.0; females 88.0). The study shows that the basic iodine intake level is overestimated if individual iodine supplementation is not taken into account. Such supplementation may lead to median iodine excretion values that seem reasonable, even if the iodine intake of the part of the population not taking iodine (in this study, nearly half of the population) is low. Klaus Pedersen, Department of Internal Medicine and Endocrinology, Aalborg Hospital, Reberbansgade, DK-9000 Aalborg, Denmark

scholarly journals Association between Urinary Iodine Concentration and Thyroid Nodules in Adults: A Cross-Sectional Study in China

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Hui Sun ◽  
Hanyu Wang ◽  
Xiaolan Lian ◽  
Chao Liu ◽  
Bingyin Shi ◽  
...  
Keyword(s):  
Thyroid Nodules ◽  
Urinary Iodine ◽  
Iodine Concentration ◽  
Cross Sectional Study ◽  
Iodine Intake ◽  
Thyroid Peroxidase ◽  
Urinary Iodine Concentration ◽  
Cross Sectional ◽  
Physical Examinations ◽  
The Relationship

Background. Associations between iodine intake and thyroid nodules (TNs) were not consistent. We aimed to illustrate the relationship between urinary iodine concentration (UIC) and TNs. Methods. A total of 12,698 participants were enrolled in analysis. All of the participants filled out questionnaires and underwent physical examinations, laboratory tests, and thyroid ultrasonography. UIC, serum thyrotropin (TSH), thyroid peroxidase antibodies (TPOAb), and thyroglobulin antibodies (TgAb) were measured in the central laboratory. Results. The prevalence of TNs was 16.00%, and the median UIC was 206.1 μg/L. TNs and UIC were negatively related when UIC was less than 527 μg/L ( adjusted   OR = 0.87 ; 95% CI, 0.80, 0.94), and the relationship between UIC and TNs was not statistically significant when UIC was greater than 527 μg/L ( adjusted   OR = 1.25 ; 95% CI, 0.98, 1.60). In women, UIC was negatively associated with risk for TNs (adjusted OR 0.95; 95% CI, 0.91, 0.99). Conclusion. The relationship between TNs and UIC differed between men and women. The risk of TNs decreased with the elevation of UIC in men when UIC was lower than 527 μg/L, while UIC and the presence of TNs were negatively correlated in women. In the future, cohort studies or other studies that can explain causality must be conducted to explore the relationship between iodine status and TNs.

scholarly journals Impaired Fertility Associated with Subclinical Hypothyroidism and Thyroid Autoimmunity: The Danish General Suburban Population Study

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Anne-Dorthe Feldthusen ◽  
Palle L. Pedersen ◽  
Jacob Larsen ◽  
Tina Toft Kristensen ◽  
Christina Ellervik ◽  
...  
Keyword(s):  
Population Study ◽  
Subclinical Hypothyroidism ◽  
Thyroid Autoimmunity ◽  
Cross Sectional Study ◽  
Thyroid Peroxidase ◽  
Spontaneous Abortions ◽  
Full Cohort ◽  
Cross Sectional ◽  
Number Of Children ◽  
First Child

Introduction.The aim of this study was to estimate the significance of TSH, thyroid peroxidase antibody (TPOAb), and mild (subclinical) hypothyroidism in women from The Danish General Suburban Population Study (GESUS) on the number of children born, the number of pregnancies, and the number of spontaneous abortions.Methods.Retrospective cross sectional study of 11254 women participating in GESUS. Data included biochemical measurements and a self-administrated questionnaire.Results.6.7% had mild (subclinical) hypothyroidism and 9.4% prevalent hypothyroidism. In women with mild hypothyroidism TPOAb was significantly elevated and age at first child was older compared to controls. TSH and TPOAb were negatively linearly associated with the number of children born and the number of pregnancies in the full cohort in age-adjusted and multiadjusted models. TSH or TPOAb was not associated with spontaneous abortions. Mild (subclinical) hypothyroidism was associated with a risk of not having children and a risk of not getting pregnant in age-adjusted and multiadjusted models. Prevalent hypothyroidism was not associated with the number of children born, the number of pregnancies, or spontaneous abortions.Conclusion.Impaired fertility is associated with TSH, TPOAb, and mild (subclinical) hypothyroidism in a Danish population of women.

scholarly journals Association of Anti-TPO Antibodies with Insulin Resistance in Patients of Hypothyroidism with Metabolic Syndrome: A Cross-sectional Study

2020 ◽  
Author(s):  
Amit Jain ◽  
Sagar Dholariya ◽  
Mirza Masroor ◽  
P Lali ◽  
L Chandra ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Metabolic Syndrome ◽  
Subclinical Hypothyroidism ◽  
Linear Regression Analysis ◽  
Cross Sectional Study ◽  
Thyroid Peroxidase ◽  
Multivariate Linear Regression Analysis ◽  
Model Assessment ◽  
Sectional Study ◽  
Cross Sectional

Introduction: Hypothyroidism and Metabolic Syndrome (MetS) are associated with insulin resistance. Exact reason for development of insulin resistance in hypothyroidism is still unclear. Aim: To determine the association between Anti-Thyroid Peroxidase Antibodies (Anti-TPO Abs) and Thyroid Stimulating Hormone (TSH) with components of MetS, Fasting Insulin (FSI) and Homeostatic Model Assessment Index for Insulin Resistance (HOMA-IR). Materials and Methods: Total 118 subjects of hypothyroidism were included in this cross-sectional study. The diagnosis of MetS was made based on National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) criteria. Independent association of components of MetS, FSI and HOMA-IR with TSH and anti-TPO Abs was analysed by multivariate linear regression analysis. Results: MetS was more prevalent in subclinical hyperthyroidism (53.0%) compared to overt hypothyroidism (49.3%). Serum anti-TPO Abs level was significantly high in MetS group compared to non-MetS group in both overt (200.0±170.2 and 122.8±98.9, p=0.02*) and subclinical (184.9±142.9 and 114.5±90.9, p=0.04*) hyperthyroidism. Waist Circumference (WC), Fasting Plasma Glucose (FPG), FSI and HOMA-IR were independently associated with anti-TPO Abs in both overt and subclinical hypothyroidism. Anti-TPO was also increased significantly in linear trend along with increased in the number of MetS components in both overt and subclinical hypothyroidism. Conclusion: MetS is highly prevalent in hypothyroidism and anti-TPO Abs rather than TSH and is more associated with insulin resistance in patients of hypothyroidism with MetS.

scholarly journals Early menarche is independently associated with subclinical hypothyroidism: a cross-sectional study

2019 ◽  
Vol 38 (1) ◽  
Author(s):  
Marianna Kotopouli ◽  
Theodora Stratigou ◽  
Georgios Antonakos ◽  
Gerasimos Socrates Christodoulatos ◽  
Irene Karampela ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Subclinical Hypothyroidism ◽  
Thyroid Autoimmunity ◽  
Reproductive Factors ◽  
Cross Sectional Study ◽  
Full Term ◽  
Age At Menarche ◽  
Sectional Study ◽  
Cross Sectional ◽  
Early Menarche

Abstract Background Subclinical hypothyroidism (SH) is more frequent in females than males, with a female to male ratio ranging from 1.5 to 5 in the general population. The aim of this study was to evaluate for the first time the association of reproductive factors, particularly age at menarche, with SH risk. Materials and methods In a cross-sectional study, reproductive factors such as age at menarche, at menopause and at first birth, lactation, parity, full-term pregnancies, reproductive years, use of oral contraceptives and hormonal replacement therapy, somatometric data and insulin resistance parameters were recorded in 72 consecutive female patients with SH and 72 healthy female controls matched on age (±5 years) and date of diagnosis (±1 month). Results SH cases exhibited significantly younger age at menarche than controls (12.6 ± 1.2 vs. 13.3 ± 0.8 years, respectively, p < 0.001). Cases presented later age at first pregnancy with a lower number of full-term pregnancies (p = 0.04). Early age at menarche was independently associated with SH risk, above and beyond thyroid autoimmunity, body mass index (BMI), hip circumference (HC), homeostatic model assessment of insulin resistance and alcohol consumption [odds ratio (OR): 0.22, 95% confidence interval (CI): 0.11–0.44; p < 0.001]. Conclusions It is possible that an interplay of early exposure to estrogens, as expressed by early menarche, and induction of thyroid autoimmunity may be associated with SH risk. More prospective studies shedding light on the role of estrogens in SH are required to confirm these findings.

scholarly journals Effect of the Cut-Off Level for Thyroid-Stimulating Hormone on the Prevalence of Subclinical Hypothyroidism among Infertile Mexican Women

Diagnostics ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 417
Author(s):  
Lidia Arce-Sánchez ◽  
Salvatore Giovanni Vitale ◽  
Claudia Montserrat Flores-Robles ◽  
Myrna Souraye Godines-Enriquez ◽  
Marco Noventa ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Subclinical Hypothyroidism ◽  
Thyroid Autoimmunity ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Mexican Women ◽  
Cross Sectional ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

The primary aim of this study was to compare the prevalence of subclinical hypothyroidism (SCH) using two different cut-off levels for TSH values (≥2.5 mIU/L versus ≥4.1 mIU/L). The secondary objective was to analyze the clinical-biochemical characteristics in women with and without SCH. This was a retrospective cross-sectional study. In total, 1496 Mexican women with infertility were included: Group 1, women with TSH levels ranging between 0.3 and 2.49 mIU/L, n = 886; Group 2, women with TSH between 2.5 and 4.09 mIU/L, n = 390; and Group 3, women with TSH ≥4.1 mIU/L n = 220. SCH prevalence was 40.7% (CI 95%: 38.3–43.3%) with TSH cut-off ≥ 2.5 mIU/L, and 14.7% (CI 95%: 12.7–16.5%) with TSH cut-off ≥ 4.1 mIU/L, (p = 0.0001). The prevalence of overweight was higher in Group 2 than in Groups 1 and 3. Thyroid autoimmunity, obesity and insulin resistance were higher in Group 3 than in Group 1 (p < 0.05). No other differences were observed between groups. Conclusions: The prevalence of SCH in our selected patients increased almost three times using a TSH cut-off ≥ 2.5 mIU/L compared with a TSH cut-off ≥ 4.1 mIU/L. Women with TSH ≥4.1 mIU/L compared with TSH cut-off ≤ 2.5 mIU/L more often presented with obesity, thyroid autoimmunity and insulin resistance.

scholarly journals Metals Exposures of Residents Living Near the Akaki River in Addis Ababa, Ethiopia: A Cross-Sectional Study

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Ellen Yard ◽  
Tesfaye Bayleyegn ◽  
Almaz Abebe ◽  
Andualem Mekonnen ◽  
Matthew Murphy ◽  
...  
Keyword(s):  
Drinking Water ◽  
Addis Ababa ◽  
Urinary Iodine ◽  
Reference Value ◽  
Cross Sectional Study ◽  
World Health ◽  
Sectional Study ◽  
Cross Sectional ◽  
Metal Levels ◽  
Akaki River

Background. The Akaki River in Ethiopia has been found to contain elevated levels of several metals. Our objectives were to characterize metals exposures of residents living near the Akaki River and to assess metal levels in their drinking water.Methods. In 2011, we conducted a cross-sectional study of 101 households in Akaki-Kality subcity (near the Akaki River) and 50 households in Yeka subcity (distant to the Akaki River). One willing adult in each household provided urine, blood, and drinking water sample.Results. Urinary molybdenum (p<0.001), tungsten (p<0.001), lead (p<0.001), uranium (p<0.001), and mercury (p=0.049) were higher in Akaki-Kality participants compared to Yeka participants. Participants in both subcities had low urinary iodine; 45% met the World Health Organization (WHO) classification for being at risk of moderate iodine deficiency. In Yeka, 47% of households exceeded the WHO aesthetic-based reference value for manganese; in Akaki-Kality, only 2% of households exceeded this value (p<0.001). There was no correlation between metals levels in water samples and clinical specimens.Conclusions. Most of the exposures found during this investigation seem unlikely to cause acute health effects based on known toxic thresholds. However, toxicity data for many of these metals are very limited.

Pattern of Thalassemia and Hemoglobinopathies Among Anemic Under-Five Children of Northern Bangladesh: A Hospital Based Cross Sectional Study

2021 ◽  
Author(s):  
Md. Abdur Rafi ◽  
M. Morsed Zaman ◽  
Md. Golam Hossain
Keyword(s):  
Cross Sectional Study ◽  
Severe Form ◽  
Health Concern ◽  
Sectional Study ◽  
Cross Sectional ◽  
Hemoglobin E ◽  
Under Five ◽  
Under Five Children ◽  
Thalassemia Minor ◽  
Different Types

Abstract Background Congenital hemoglobin defects are significant global health concern affecting more than 330,000 newborns every year. In Bangladesh more than half of the under-five children are anemic, but the contribution of hemoglobin disorders to childhood anemia is quite unexplored. Hence, the objective of the present study was to investigate the prevalence and pattern of hemoglobinopathies among anemic under-five (age 6–59 months) children visiting the hematology department of Rajshahi Medical College Hospital (RMCH). Methods This was a retrospective cross-sectional study among anemic patients aged between 6 to 59 months conducted in the hematology department of RMCH from July 2018 to June 2020. The guideline of WHO was used to define the severity of anemia. Hemoglobinopathies was measured using standard methods. Chi-square test was used to find the association between two categorical factors. Results Female and younger children included in the study were more likely to suffer from moderate to severe form of anemia compared to their counterparts. Out of 534 patients 183 were suffering from different types of hemoglobinopathies (prevalence 34.3%). E-β-Thalassemia was the most common type of hemoglobinopathy (14%) followed by Hemoglobin E trait (11%) and β-Thalassemia minor (5.6%). Prevalence of these hemoglobin disorders was comparatively higher among female and older children (p < 0.05). Patients with E-β-Thalassemia and β-Thalassemia major of our study were mostly suffering from severe form of anemia while patients with hemoglobin E trait and β-Thalassemia minor were mostly suffering from mild anemia (p < 0.01). Conclusions A remarkable number of children were suffering from severe anemia and different types of hemoglobinopathies. Gender and age group were the risk factors of anemia and hemoglobinopathies among under-five children. Health authorities of Bangladesh should especially take care of anemic children in this country.

scholarly journals The Reliability of Iodine Concentration in Diaper-Retrieved Infant Urine Using Urine Collection Pads, and in Their Mothers’ Breastmilk

Biomolecules ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 295
Author(s):  
Kjersti Sletten Bakken ◽  
Ingvild Oma ◽  
Synne Groufh-Jacobsen ◽  
Beate Stokke Solvik ◽  
Lise Mette Mosand ◽  
...  
Keyword(s):  
Intraclass Correlation ◽  
Urinary Iodine ◽  
Correlation Coefficients ◽  
Iodine Concentration ◽  
Cross Sectional Study ◽  
Iodine Intake ◽  
Public Healthcare ◽  
Urinary Iodine Concentration ◽  
Childbearing Age ◽  
Cross Sectional

Mild to moderate iodine deficiency is common among women of childbearing age. Data on iodine status in infants are sparse, partly due to the challenges in collecting urine. Urinary iodine concentration (UIC) is considered a good marker for recent dietary iodine intake and status in populations. The aim of this study was to investigate the reliability of iodine concentration measured in two spot-samples from the same day of diaper-retrieved infant urine and in their mothers’ breastmilk. We collected urine and breastmilk from a sample of 27 infants and 25 mothers participating in a cross-sectional study at two public healthcare clinics in Norway. The reliability of iodine concentration was assessed by calculating the intraclass correlation coefficients (ICC) and the coefficient of variation (CV). The ICC for infants’ urine was 0.64 (95% confidence interval (CI) 0.36–0.82), while the ICC for breastmilk was 0.83 (95% CI 0.65–0.92) Similarly, the intraindividual CV for UIC was 0.25 and 0.14 for breastmilk iodine concentration (BIC). Compared to standard methods of collecting urine for measuring iodine concentration, the diaper-pad collection method does not substantially affect the reliability of the measurements.

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