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SUBCLINICAL HYPOTHYROIDISM PREVALENCE AND SELENIUM LEVELS IN WOMEN OF NORTH KHORASAN, IRAN: A CROSS-SECTIONAL STUDY.

Kimiya Hadavi1, Ali Esmaeili2, Zeynab Moallemi1

  • 1Student Research Committee, Faculty of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran.

Acta Clinica Croatica
|October 6, 2025
PubMed
Summary

Subclinical hypothyroidism affects 6.48% of women in North Khorasan, Iran. Higher serum selenium levels were linked to increased thyroid-stimulating hormone (TSH) in these individuals.

Keywords:
SeleniumSubclinical hypothyroidismThyroid hormones

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Area of Science:

  • Endocrinology
  • Nutritional Science
  • Public Health

Background:

  • Subclinical hypothyroidism (SCH) is a precursor to overt hypothyroidism.
  • The thyroid gland has the highest selenium concentration, crucial for thyroid hormone metabolism.
  • Selenium's role in SCH requires further investigation, particularly in specific populations.

Purpose of the Study:

  • To determine the prevalence of SCH in North Khorasan, Iran.
  • To assess serum selenium levels in women with SCH.
  • To explore the relationship between selenium status and SCH.

Main Methods:

  • Prospective study of 550 females (aged 20-55).
  • Measurement of serum TSH, T4, and T3 levels.
  • Comparison of serum selenium and thyroid hormone levels between SCH and control groups using ELISA and atomic absorption methods.

Main Results:

  • The prevalence of SCH was 6.48% in the studied population.
  • Significant differences in serum TSH and selenium levels were found between the SCH and control groups.
  • A positive correlation was observed between TSH and selenium levels within the SCH group.

Conclusions:

  • SCH is prevalent in North Khorasan, Iran.
  • Serum selenium levels are associated with SCH.
  • Higher selenium levels may be linked to increased TSH in individuals with subclinical hypothyroidism.