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Comparison of triglyceride-glucose index and HOMA-IR as indicators of insulin resistance in obese women with subclinical hypothyroidism

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Onur Kirac C., Sirikci V., Avni Findikli H.
European Journal of Clinical and Experimental Medicine
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2022
|
issue 4
412-416
EN
Introduction and aim. Thyroid hormones play an important role in glucose metabolism as in many metabolic events. The aim of our study is to evaluate the relationship between subclinical hypothyroidism (SCH) and insulin resistance, especially in obese women. Material and methods. Newly diagnosed SCH patients with body mass index (BMI) ≥30 who applied to our outpatient clinic between March 2021 and October 2021, and euthyroid obese women who applied for routine control were included in the study. In this study, we used homeostasis model assessment of insulin resistance (HOMA-IR) and triglyceride glucose (TyG) indexes, which are noninvasive, simple and useful methods for evaluating insulin sensitivity. Results. The study included 78 female patients between the ages of 19 and 64. A correlational analysis was performed between thyroid stimulating hormone (TSH) and HOMA-IR, TyG, and BMI. The results showed that TSH levels were positively correlated with HOMA-IR (R=0.297, p=0.008), TyG (R=0.316, p=0.005) and BMI (R=0.307, p=0.006). This relationship was stronger for TyG compared to the other variables. As another finding, BMI was positively correlated with HOMA-IR (R=0.359, p=0.001) and TyG (R=0.404, p<0.001). This relationship was stronger for TyG than HOMA-IR. Conclusion. These results show that patients with SCH are at risk of developing diseases that accompany insulin resistance, such as metabolic syndrome and cardiovascular disorders. The most important finding of our study is that the TyG index gives more significant results than HOMA-IR, especially in obese women.
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Evaluation of the relationship between subclinical hypothyroidism and metabolic syndrome components among workers

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Cheserek M., Wu G., Shen L., Shi Y., Le G.
International Journal of Occupational Medicine and Environmental Health
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2014
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vol. 27
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issue 2
175-187
EN
Objectives: Both hyperthyroidism and overt hypothyroidism are associated with increased prevalence of metabolic syndrome and its components, while data on subclinical hypothyroidism is currently limited especially in working populations. The aim of this study was to examine the association between subclinical hypothyroidism and metabolic syndrome components in workers; and to evaluate whether there are differences by sex and occupation. Material and Methods: A total of 1150 university employees (male - 792, female - 358) aged 30-60 years who came for an annual medical check-up were studied. Anthropometric measurements were taken, and blood pressure, fasting plasma glucose (FPG), lipid profiles, thyroid stimulating hormone (TSH), free thyroxin (FT4) and free triiodothyronine (FT3) levels were measured. Results: After adjustment for age and body mass index (BMI), TSH was positively associated with increased triglyceride (TG) levels (β = 0.108, p = 0.020) and FPG (β = 0.130, p = 0.006) in subclinical hypothyroid male workers. However, TSH was not associated (p > 0.05) with any component of metabolic syndrome (MS) in the euthyroid group. In females, TSH was not correlated with MS components in both euthyroid and subclinical hypothyroid groups. Furthermore, comparison by occupation showed higher TSH in subclinical hypothyroid male workers employed in administration (5.23±0.52 mU/l) than those working as academics (5.12±0.52 mU/l), which resulted in elevated systolic and diastolic blood pressure, FPG, total cholesterol, TG and high density lipoprotein cholesterol. In females, BMI, systolic and diastolic blood pressure, TG and FPG were significantly (p < 0.05) higher in subclinical hypothyroid administrators than those in academics. Conclusions: Subclinical hypothyroidism was associated with metabolic syndrome components in male workers and not in females. Administration workers showed increased metabolic risks compared to academics. The findings suggest that the assessment of thyroid function in individuals with metabolic syndrome in the workplace may be favorable especially among men.
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