scholarly journals Free Triiodothyronine Concentrations Are Inversely Associated with Microalbuminuria

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Yulin Zhou ◽  
Lei Ye ◽  
Tiange Wang ◽  
Jie Hong ◽  
Yufang Bi ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Endothelial Damage ◽  
Chinese Adults ◽  
Free Triiodothyronine ◽  
Cross Sectional ◽  
Ratio Measurement ◽  
Chemiluminescent Microparticle Immunoassay ◽  
Adjusted Logistic Regression

Thyroid function and microalbuminuria are both associated with vascular disease and endothelial damage. However, whether thyroid function is associated with microalbuminuria is not well established. The objective was to explore the relationship between thyroid hormones and microalbuminuria in Chinese population. A community-based cross-sectional study was performed among 3,346 Chinese adults (aged ≥ 40 years). Serum free triiodothyronine (FT3), free thyroxine (FT4), and TSH (thyroid stimulating hormone) were determined by chemiluminescent microparticle immunoassay. A single-void first morning urine sample was obtained for urinary albumin-creatinine ratio measurement. The prevalence of microalbuminuria decreased according to FT3 quartiles (13.2, 9.5, 8.6, and 8.2%,Pfor trend = 0.0005). A fully adjusted logistic regression analysis showed that high FT3 levels were associated with low prevalent microalbuminuria. The adjusted odds ratios for microalbuminuria were 0.61 (95% CI, 0.43–0.87,P= 0.007) when comparing the highest with the lowest quartile of FT3. The exclusion of participants with abnormal FT3 did not appreciably change the results (OR = 0.69, 95% CI, 0.49–0.98,P= 0.02). We concluded that serum FT3 levels, even within the normal range, were inversely associated with microalbuminuria in middle-aged and elderly Chinese adults. FT3 concentrations might play a role in the pathogenesis of microalbuminuria.

scholarly journals Independent associations of thyroid-related hormones with hepatic steatosis and insulin resistance in euthyroid overweight/obese Chinese adults

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Danyan Ma ◽  
Jinyang Zeng ◽  
Bingkun Huang ◽  
Fangfang Yan ◽  
Jiawen Ye ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Hepatic Steatosis ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Model Assessment ◽  
Chinese Adults ◽  
Free Triiodothyronine ◽  
Cross Sectional ◽  
Fatty Liver Index ◽  
Homeostatic Model Assessment

Abstract Purpose The aim of the study is to explore the independent association of free triiodothyronine (FT3), free thyroxine (FT4) and thyroid stimulating hormone (TSH) with hepatic steatosis and insulin resistance. Methods A cross-sectional study of 88 overweight/obese adults who underwent anthropometric measurements [BMI, waist circumference (WC) and waist-to-height ratio (WHtR)], hepatic steatosis assessment (FibroScan) and thyroid-related hormones tests was conducted from 2018 to 2020 in Xiamen, China. Results Subjects with increasing tertiles of FT3 showed significantly higher levels of controlled attenuation parameter (CAP) ((295.4 ± 44.1, 290.1 ± 68.2 and 331.7 ± 43.6 (dB/m) for tertile 1–3, respectively, p = 0.007) and fatty liver index (FLI) score (47.7 (33.9–60.8), 61.5 (45.1–88.9) and 90.5 (84.5–94.8), respectively, p < 0.001). FT3 significantly and positively correlated with obesity index (BMI, WC, and WHtR), homeostatic model assessment of insulin resistance (HOMA-IR) and hepatic steatosis (CAP and FLI). Multivariable linear regression analyses with adjustment for potential confounding factors showed FT3 was independently associated with BMI (regression coefficient (β (95%CI): 0.024 (0.004–0.043), p = 0.020), HOMA-IR (β (95%CI): 0.091 (0.007–0.174), p = 0.034), CAP (β (95%CI): 25.45 (2.59–48.31), p = 0.030) and FLI (β (95%CI): 0.121 (0.049–0.194), p = 0.001). Neither FT4 nor TSH was significantly associated with any indicators of obesity, insulin resistance or hepatic steatosis. Conclusions Increased FT3, but not FT4 or TSH, was independently associated with higher risks of hepatic steatosis and insulin resistance in euthyroid overweight/obese Chinese adults. Trial registration Registration is not applicable for our study.

scholarly journals HbA1c is inversely associated with thyroid cysts in a euthyroid population: A cross-sectional study

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253841
Author(s):  
Yuji Shimizu ◽  
Shin-Ya Kawashiri ◽  
Yuko Noguchi ◽  
Yasuhiro Nagata ◽  
Takahiro Maeda ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Thyroid Peroxidase ◽  
Sectional Study ◽  
Normal Range ◽  
Free Triiodothyronine ◽  
Free T4 ◽  
Cross Sectional ◽  
Normal Thyroid Function

Anti-thyroid peroxidase antibody (TPO-Ab) is revealed to be inversely associated with thyroid cysts among euthyroid population. TPO-Ab causes autoimmune thyroiditis by bolstering thyroid inflammation. Therefore, at least partly, absence of thyroid cysts could indicate latent thyroid damage. Since participants with subclinical hypothyroidism are reported to have higher HbA1c than normal healthy controls, HbA1c could be inversely associated with thyroid cysts through a mechanism reflecting latent thyroid damage. To investigate the association between HbA1c and thyroid cysts among a euthyroid population, a cross-sectional study was conducted on 1,724 Japanese individuals who were within the normal range of thyroid function [i.e., normal range of free triiodothyronine (T3) and free thyroxine (T4)] and aged 40–74 years. Among this study population, 564 were diagnosed with thyroid cysts. Independently of thyroid related hormones [thyroid stimulating hormone (TSH), free T3, and free T4] and known cardiovascular risk factors, HbA1c was found to be significantly inversely associated with the presence of thyroid cysts. This association remained significant even after this analysis was limited to participants within a normal range of TSH. The fully adjusted odds ratios (ORs) of thyroid cysts for 1 standard deviation (SD) increment of HbA1c were 0.84 (0.74, 0.95) for total participants and 0.80 (0.70, 0.92) for participants within a normal range of TSH. Among participants with normal thyroid function, HbA1c was inversely associated with the presence of thyroid cysts. The absence of thyroid cysts and higher levels of HbA1c could indicate the latent functional damage of the thyroid.

scholarly journals Retrospective analysis of thyroid function in drug-free patients with bipolar disorder in China

2019 ◽  
Author(s):  
Bin Yang ◽  
Yan Zhong Li ◽  
Qi Wang ◽  
Xin Sheng Guo ◽  
Ying Zhao ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Thyroid Function ◽  
Bipolar Depression ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Thyroid Function Tests ◽  
Free Triiodothyronine ◽  
Cross Sectional ◽  
Female Patients ◽  
Previous Hospitalization

Abstract Background Bipolar disorder is a common mental illness with serious consequences. Clinical studies have found that thyroid function may have an impact on patients with bipolar disorder, but there are few relevant studies in China. So this study explores the characteristics of thyroid function in patients with bipolar disorder in China.Methods Using retrospective cohort study and a cross-sectional study, thyroid function tests were performed in inpatients from September 2015 to January 2018 in the Second Affiliated Hospital of Xinxiang Medical University, who were diagnosed with bipolar disorder and were not treated with medications for at least three months before hospitalization.Results We found that the triiodothyronine (T3) and free triiodothyronine (FT3) levels were significantly higher in bipolar mania than in bipolar depression (P < 0.01). The thyroid stimulating hormone (TSH) levels were significantly lower in male than female patients, while the FT3, free thyroxine (FT4) levels were higher in male than female patients (P < 0.01). Patients were divided into two groups: those who used lithium and those who did not. Both groups had a tendency of hypothyroidism after treatment. In addition, the T3 and FT3 levels were significantly higher in manic than in depressive status in those patients who had a transition between mania and depression in 28 patients compared with previous hospitalization (P < 0.05).Conclusion Patients with bipolar disorder may develop thyroid dysfunction at different stages and in male/female sexes.

scholarly journals Association between Hyperhomocysteinemia and Thyroid Hormones in Euthyroid Diabetic Subjects

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Yun Zhang ◽  
Qiong Wang ◽  
Quanzhong Li ◽  
Ping Lu
Keyword(s):  
Blood Pressure ◽  
Fasting Glucose ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Diabetic Patients ◽  
Biomedical Data ◽  
Sectional Study ◽  
Free Triiodothyronine ◽  
Cross Sectional ◽  
Elderly Males

Objectives. The concept now emerging is that higher thyroid-stimulating hormone (TSH) and lower thyroid hormone levels within the euthyroid range may adversely affect atherosclerosis. The present study aimed to investigate the potential associations between thyroid parameters and hyperhomocysteinaemia in a cohort of euthyroid diabetic subjects.Material and Methods. Two hundred and seventy-three euthyroid diabetic subjects (167 males and 106 females) were consecutively recruited in this cross-sectional study. Clinical and biomedical data was collected.Results. TSH level was higher in females than males. Compared to normal-homocysteine group, hyperhomocysteinaemia group was more likely to be elderly, males, with longer diabetes history, and with lower diastolic blood pressure. Free thyroxine (FT4) level was lower in hyperhomocysteinaemia group than in normal-homocysteine group; however, it was not statistically significant. Adjusted for age, sex, body mass index, duration of diabetes, blood pressure, fasting glucose, total cholesterol, and triglyceride in logistic regression analyses, hyperhomocysteinaemia was significantly correlated with FT4 (P=0.021). No significant association was found with TSH or free triiodothyronine. When analyzed in subjects with TSH < 2.5 uIU/mL separately, we got similar results.Conclusions. In conclusion, we identified a relation between hyperhomocysteinemia and FT4 in a group of euthyroid diabetic patients.

scholarly journals Reference Intervals of Thyroid Hormones and Correlation of BMI with Thyroid Function in Healthy Zhuang Ethnic Pregnant Women

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Yonghong Sheng ◽  
Dongping Huang ◽  
Shun Liu ◽  
Xuefeng Guo ◽  
Jiehua Chen ◽  
...  
Keyword(s):  
Thyroid Hormones ◽  
Pregnant Women ◽  
Thyroid Function ◽  
Reference Intervals ◽  
Thyroid Stimulating Hormone ◽  
Specific Reference ◽  
American Thyroid Association ◽  
Reference Ranges ◽  
Free Triiodothyronine ◽  
Cross Sectional

Ethnic differences in the level of thyroid hormones exist among individuals. The American Thyroid Association (ATA) recommends that an institution or region should establish a specific thyroid hormone reference value for each stage of pregnancy. To date, a limited number of studies have reported the level of thyroid hormones in Chinese minorities, and the exact relationship between BMI and thyroid function in pregnant women is ill. This study was performed to establish trimester-specific reference ranges of thyroid hormones in Zhuang ethnic pregnant women and explore the role of body mass index (BMI) on thyroid function. A total of 3324 Zhuang ethnic health pregnant women were recruited in this Zhuang population-based retrospective cross-sectional study. The values of thyroid stimulating hormone (TSH), free thyroxine (FT4), and free triiodothyronine (FT3) were determined by automatic chemiluminescence immunoassay analyzer. Multivariate linear regression and binary logistic regression were constructed to evaluate the influence of BMI on the thyroid function. The established reference intervals for the serum thyroid hormones in three trimesters were as follows: TSH, 0.02–3.28, 0.03–3.22, and 0.08-3.71 mIU/L; FT4, 10.57–19.76, 10.05–19.23, and 8.96–17.75 pmol/L; FT3, 3.51–5.64, 3.42–5.42, and 2.93–5.03 pmol/L. These values were markedly lower than those provided by the manufacturers for nonpregnant adults which can potentially result in 6.10% to 19.73% misclassification in Zhuang pregnant women. Moreover, BMI was positively correlated with isolated hypothyroxinemia (OR=1.081, 95% CI=1.007–1.161), while the correlation between the BMI and subclinical hypothyroidism was not statistically significant (OR=0.991, 95% CI=0.917–1.072). This is the first study focusing on the reference ranges of thyroid hormones in Guangxi Zhuang ethnic pregnant women, which will improve the care of them in the diagnosis and treatment. We also found that high BMI was positively associated with the risk of isolated hypothyroxinemia.

scholarly journals Cigarette smoking is associated with higher thyroid hormone and lower TSH levels: the PREVEND study

Endocrine ◽  
2019 ◽  
Vol 67 (3) ◽  
pp. 613-622 ◽  
Author(s):  
Eke G. Gruppen ◽  
Jenny Kootstra-Ros ◽  
Anneke Muller Kobold ◽  
Margery A. Connelly ◽  
Daan Touw ◽  
...  
Keyword(s):  
Alcohol Consumption ◽  
Cigarette Smoking ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Self Report ◽  
Free Triiodothyronine ◽  
Cross Sectional ◽  
Current Smoking ◽  
Urinary Cotinine ◽  
Tsh Levels

Abstract Purpose The extent to which smoking is associated with thyroid stimulating hormone (TSH), free thyroxine (FT4), and free triiodothyronine (FT3) when taking account of clinical variables including alcohol consumption is unclear. We aimed to determine associations of TSH, FT4, and FT3 levels with current smoking. Methods A cross-sectional study was performed in 5766 euthyroid participants (Prevention of Renal and Vascular End-Stage Disease cohort). Current smoking was determined by self-report, categorized as never, former, and current (≤20 and >20 cigarettes per day). Smoke exposure was determined by urinary cotinine. Results Current smoking of ≤20 and >20 cigarettes per day was associated with lower TSH and higher FT3 levels. FT4 levels were higher in subjects smoking <20 cigarettes per day vs. never and former smokers. Current smokers also consumed more alcohol. Multivariable linear regression analyses adjusted for age, sex, anti-TPO autoantibody positivity, alcohol consumption, and other variables demonstrated that lower TSH, higher FT4 and higher FT3 were associated with smoking ≤20 cigarettes per day vs. subjects who never smoked (P < 0.001, P = 0.018, and P < 0.001, respectively) without a further significant incremental effect of smoking >20 cigarettes per day. In agreement, TSH was inversely, whereas FT4 and FT3 levels were positively associated with urinary cotinine (P < 0.001 for each). In contrast, alcohol consumption >30 g per day conferred higher TSH and lower FT3 levels. Conclusions Cigarette smoking is associated with modestly higher FT4 and FT3, and lower TSH levels, partly opposing effects of alcohol consumption.

scholarly journals Iodine status and thyroid function among Spanish schoolchildren aged 6–7 years: the Tirokid study

2016 ◽  
Vol 115 (9) ◽  
pp. 1623-1631 ◽  
Author(s):  
L. Vila ◽  
S. Donnay ◽  
J. Arena ◽  
J. J. Arrizabalaga ◽  
J. Pineda ◽  
...  
Keyword(s):  
Thyroid Function ◽  
Reference Values ◽  
Thyroid Autoimmunity ◽  
Geographical Area ◽  
Public Health Problem ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Cross Sectional ◽  
History Of ◽  
Tsh Levels

AbstractI deficiency is still a worldwide public health problem, with children being especially vulnerable. No nationwide study had been conducted to assess the I status of Spanish children, and thus an observational, multicentre and cross-sectional study was conducted in Spain to assess the I status and thyroid function in schoolchildren aged 6–7 years. The median urinary I (UI) and thyroid-stimulating hormone (TSH) levels in whole blood were used to assess the I status and thyroid function, respectively. A FFQ was used to determine the consumption of I-rich foods. A total of 1981 schoolchildren (52 % male) were included. The median UI was 173 μg/l, and 17·9 % of children showed UI<100 μg/l. The median UI was higher in males (180·8 v. 153·6 μg/l; P<0·001). Iodised salt (IS) intake at home was 69·8 %. IS consumption and intakes of ≥2 glasses of milk or 1 cup of yogurt/d were associated with significantly higher median UI. Median TSH was 0·90 mU/l and was higher in females (0·98 v. 0·83; P<0·001). In total, 0·5 % of children had known hypothyroidism (derived from the questionnaire) and 7·6 % had TSH levels above reference values. Median TSH was higher in schoolchildren with family history of hypothyroidism. I intake was adequate in Spanish schoolchildren. However, no correlation was found between TSH and median UI in any geographical area. The prevalence of TSH above reference values was high and its association with thyroid autoimmunity should be determined. Further assessment of thyroid autoimmunity in Spanish schoolchildren is desirable.

scholarly journals Free Triiodothyronine Levels Are Associated with Diabetic Nephropathy in Euthyroid Patients with Type 2 Diabetes

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jingcheng Wu ◽  
Xiaohua Li ◽  
Yang Tao ◽  
Yufei Wang ◽  
Yongde Peng
Keyword(s):  
Type 2 Diabetes ◽  
Diabetic Nephropathy ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Free Triiodothyronine ◽  
Cross Sectional ◽  
Traditional Risk Factors

Objective. To investigate the association of thyroid function and diabetic nephropathy (DN) in euthyroid patients with type 2 diabetes.Methods. A total of 421 patients were included in this cross-sectional study. The following parameters were assessed: anthropometric measurements, fast plasma glucose, serum creatinine, lipid profile, HbA1c, free triiodothyronine (FT3), free thyroxine, thyroid-stimulating hormone levels, and urinary albumin-to-creatinine ratio (UACR). Patients with UACR of ≥30 mg/g were defined as those suffering from DN.Results. Of the 421 patients, 203 (48.2%) suffered from DN, and no difference was found between males and females. The patients with DN yielded significantly lower FT3 levels than those without DN (P<0.01). The prevalence of DN showed a significantly decreasing trend across the three tertiles based on FT3 levels (59.6%, 46.4%, and 38.6%,P<0.01). After adjustment for gender and age, FT3 levels were found to correlate positively with estimated glomerular filtration rate (P=0.03) and negatively with UACR (P<0.01). Multiple linear regression analysis showed that FT3 level was independently associated with UACR (β=-0.18,t=-3.70, andP<0.01).Conclusion. Serum FT3 levels are inversely associated with DN in euthyroid patients with type 2 diabetes, independent of traditional risk factors.

scholarly journals New Reference Values for Thyroid Volume and a Comprehensive Assessment for Influencing Factors in Chinese Adults with Iodine Sufficiency

2021 ◽  
pp. 1-8
Author(s):  
Wenxing Guo ◽  
Long Tan ◽  
Shuyao Dong ◽  
Ya Jin ◽  
Mei Zhu ◽  
...  
Keyword(s):  
Quantile Regression ◽  
Reference Values ◽  
Thyroid Volume ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Regression Analyses ◽  
Chinese Adults ◽  
Cross Sectional ◽  
Factors Associated ◽  
Iodine Sufficiency

<b><i>Objectives:</i></b> The reference values for thyroid volume (Tvol) determined by ultrasound require supportive data of normal Tvol from local iodine-sufficient populations. This study aimed to explore new reference values for Tvol in Chinese adults and comprehensively evaluate the factors associated with enlarged Tvol. <b><i>Methods:</i></b> A cross-sectional study was conducted in Tianjin, China. Tvol was measured by ultrasound in adults with long-term iodine sufficiency. Blood and urine samples were collected to evaluate biochemical indexes, thyroid function, and iodine status. <b><i>Results:</i></b> A total of 1,991 adults from the urban and suburban areas were analysed. The trend of Tvol increasing with age was observed in men under age 40 years and in women under age 52 years. In the quantile regression analyses, we found that body surface area (BSA) (β = 7.22, 95% CI: 5.33, 9.12), thyroid-stimulating hormone (TSH) (β = −1.48, 95% CI: −2.39, −0.57), thyroid nodules (TNs) (β = 6.70, 95% CI: 2.19, 11.22), and metabolic syndrome (MetS) (β = 1.40, 95% CI: 0.63, 2.17) had a strong effect on Tvol at higher percentiles in males. The dominant factors influencing Tvol were BSA (β = 9.64, 95% CI: 2.66, 16.61), TSH (β = −0.78, 95% CI: −1.16, −0.39), and TNs (β = 1.11, 95% CI: 0.43, 1.79) in females. The largest reference values for Tvol based on BSA were 20.18 (17.79, 24.32) mL in males and 15.31 (14.05, 16.70) mL in females. <b><i>Conclusions:</i></b> Quantile regression analyses showed that a high BSA index, a decreased TSH level, and the prevalence of TNs were essential factors associated with the enlargement of the thyroid gland. Our findings reported the new reference values for Tvol determined by ultrasound based on gender and BSA in Chinese adults.

scholarly journals Independent Associations of Thyroid-Related Hormones with Hepatic Steatosis and Insulin Resistance in Euthyroid Overweight/Obese Chinese Adults

2021 ◽  
Author(s):  
Danyan Ma ◽  
Jinyang Zeng ◽  
Bingkun Huang ◽  
Fangfang Yan ◽  
Jiawen Ye ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Hepatic Steatosis ◽  
Cross Sectional Study ◽  
Thyroid Stimulating Hormone ◽  
Model Assessment ◽  
Chinese Adults ◽  
Cross Sectional ◽  
Fatty Liver Index ◽  
Homeostatic Model Assessment ◽  
Independent Association

Abstract Purpose: The aim of the study is to explore the independent association of free triodothyronine (FT3), free thyroxine (FT4) and thyroid stimulating hormone (TSH) with hepatic steatosis and insulin resistance.Methods: A cross-sectional study of 88 overweight/obese adults who underwent anthropometric measurements (BMI, waist circumference (WC) and waist-to-height ratio (WHtR)), hepatic steatosis assessment (FibroScan) and thyroid-related hormones tests was conducted from 2018 to 2020 in Xiamen, China.Results: Subjects with increasing tertiles of FT3 showed significantly higher levels of controlled attenuation parameter (CAP) ((295.4±44.1, 290.1 ± 68.2 and 331.7 ± 43.6 (dB/m) for tertile 1-3, respectively, p=0.007) and fatty liver index (FLI) score (47.7 (33.9-60.8), 61.5 (45.1-88.9) and 90.5 (84.5-94.8), respectively, p<0.001). FT3 significantly and positively correlated with obesity index (BMI, WC, and WHtR), homeostatic model assessment of insulin resistance (HOMA-IR) and hepatic steatosis (CAP and FLI). Multivariable linear regression analyses with adjustment for potential confounding factors showed FT3 was independently associated with BMI (regression coefficient (β(95%CI): 0.024(0.004-0.043), p=0.020), HOMA-IR (β(95%CI): 0.091(0.007-0.174), p=0.034), CAP (β(95%CI): 25.45(2.59-48.31), p=0.030) and FLI (β(95%CI): 0.121(0.049-0.194), p=0.001). Neither FT4 nor TSH was significantly associated with any indicators of obesity, insulin resistance or hepatic steatosis.Conclusions: Increased FT3, but not FT4 or TSH, was independently associated with higher risks of hepatic steatosis and insulin resistance in euthyroid overweight/obese Chinese adults.Trial registration: Registration is not applicable for our study.

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