Endocrinology and Metabolism

Original Articles

Rising Incidence and Comorbidities of Endogenous Hypothyroidism in Republic of Korea from 2004 to 2018: A Nationwide Population Study: Chae Won Chung, Hwa Young Ahn, Sun Wook Cho, Ka Hee Yi; Received March 28, 2024 Accepted July 15, 2024 Published online September 23, 2024; DOI: https://doi.org/10.3803/EnM.2024.1996 [Epub ahead of print]

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Abstract PDF Supplementary Material PubReader ePub: Background
Hypothyroidism, a prevalent endocrine disorder, results from insufficient thyroid hormone production or release, affecting metabolism. However, disparities in comorbidities and treatment trajectories may exist between endogenous and exogenous hypothyroidism.
Methods
Data from the Korean National Health Insurance Service from 2004 to 2018. Endogenous hypothyroidism was defined as cases with two or more diagnostic codes for hypothyroidism coupled with a history of thyroid hormone intake exceeding 60 days. To eliminate iatrogenic hypothyroidism, individuals with diagnosis codes for thyroid cancer, treatment codes for thyroid surgery, or radiotherapy were excluded. Hypothyroidism-related comorbidities were defined as new occurrences of the corresponding diagnosis code after the diagnosis of hypothyroidism during the entire study period.
Results
The age-standardized incidence of endogenous hypothyroidism among men was 0.2 per 1,000 person-years in 2004, increasing to 0.8 in 2018. Among women, the incidence increased from 1.6 per 1,000 person-years in 2004 to 3.7 in 2018. When comparing age groups of 20s–50s and 60s–90s, both sexes in the 60s–90s demonstrated a more rapid increase in incidence than those in the 20s–50s age range. Patients with endogenous hypothyroidism demonstrated a higher incidence of mood disorders across all age groups and cerebrovascular disease in individuals ≥60 years old, regardless of sex.
Conclusion
In Republic of Korea, endogenous hypothyroidism incidence has been increased in recent years. The incidence of endogenous hypothyroidism is increasing more rapidly in men than in women, especially in the elderly. Patients with endogenous hypothyroidism seem to have a heightened risk for cerebrovascular disease and mood disorders.

Thyroid Big Data Articles (National Health Insurance Service Database)
Prevalence, Treatment Status, and Comorbidities of Hyperthyroidism in Korea from 2003 to 2018: A Nationwide Population Study: Hwa Young Ahn, Sun Wook Cho, Mi Young Lee, Young Joo Park, Bon Seok Koo, Hang-Seok Chang, Ka Hee Yi; Endocrinol Metab. 2023;38(4):436-444. Published online July 12, 2023; DOI: https://doi.org/10.3803/EnM.2023.1684

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Abstract PDF Supplementary Material PubReader ePub

Background
This study aimed to investigate the changes of incidence and treatment of choice for hyperthyroidism from 2003 to 2018 and explore the treatment-related complications and concomitant comorbidities in South Korea using data from the National Health Insurance Service.
Methods
This is a retrospective observational study. Hyperthyroidism was defined as a case having two or more diagnostic codes of thyrotoxicosis, with antithyroid drug intake for more than 6 months.
Results
The average age-standardized incidence of hyperthyroidism from 2003 to 2018 was 42.23 and 105.13 per 100,000 men and women, respectively. In 2003 to 2004, hyperthyroidism was most often diagnosed in patients in their 50s, but in 2017 to 2018, people were most often diagnosed in their 60s. During the entire period, about 93.7% of hyperthyroidism patients were prescribed with antithyroid drugs, and meanwhile, the annual rates of ablation therapy decrease from 7.68% in 2008 to 4.56% in 2018. Antithyroid drug-related adverse events, mainly agranulocytosis and acute hepatitis, as well as complications of hyperthyroidism such as atrial fibrillation or flutter, osteoporosis, and fractures, occurred more often in younger patients.
Conclusion
In Korea, hyperthyroidism occurred about 2.5 times more in women than in men, and antithyroid drugs were most preferred as the first-line treatment. Compared to the general population, hyperthyroid patients may have a higher risk of atrial fibrillation or flutter, osteoporosis, and fractures at a younger age.

Citations

Citations to this article as recorded by

Long-term Effect of Thyrotropin-binding Inhibitor Immunoglobulin on Atrial Fibrillation in Euthyroid Patients
Jung-Chi Hsu, Kang-Chih Fan, Ting-Chuan Wang, Shu-Lin Chuang, Ying-Ting Chao, Ting-Tse Lin, Kuan-Chih Huang, Lian-Yu Lin, Lung-Chun Lin
Endocrine Practice.2024; 30(6): 537. CrossRef
Treatment Patterns and Preferences for Graves’ Disease in Korea: Insights from a Nationwide Cohort Study
Kyeong Jin Kim, Jimi Choi, Soo Myoung Shin, Jung A Kim, Kyoung Jin Kim, Sin Gon Kim
Endocrinology and Metabolism.2024; 39(4): 659. CrossRef
Dynamic Risk Model for the Medical Treatment of Graves’ Hyperthyroidism according to Treatment Duration
Meihua Jin, Chae A Kim, Min Ji Jeon, Won Bae Kim, Tae Yong Kim, Won Gu Kim
Endocrinology and Metabolism.2024; 39(4): 579. CrossRef
The Current Status of Hyperthyroidism in Korea
Hyemi Kwon
Endocrinology and Metabolism.2023; 38(4): 392. CrossRef
Is Thyroid Dysfunction Associated with Unruptured Intracranial Aneurysms? A Population-Based, Nested Case–Control Study from Korea
Hyeree Park, Sun Wook Cho, Sung Ho Lee, Kangmin Kim, Hyun-Seung Kang, Jeong Eun Kim, Aesun Shin, Won-Sang Cho
Thyroid®.2023; 33(12): 1483. CrossRef

Adrenal Gland Big Data Articles (National Health Insurance Service Database)
Epidemiology and Long-Term Adverse Outcomes in Korean Patients with Congenital Adrenal Hyperplasia: A Nationwide Study: Jung Hee Kim, Sunkyu Choi, Young Ah Lee, Juneyoung Lee, Sin Gon Kim; Endocrinol Metab. 2022;37(1):138-147. Published online February 28, 2022; DOI: https://doi.org/10.3803/EnM.2021.1328

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Background
Previous studies on the epidemiology and complications of congenital adrenal hyperplasia (CAH) were conducted in Western countries and in children/adolescents. We aimed to explore the epidemiology of CAH, as well as the risk of comorbidities and mortality, in a Korean nationwide case-control study.
Methods
CAH patients (n=2,840) were included between 2002 and 2017 from the National Health Insurance Service database and the Rare Intractable Disease program. CAH patients were compared, at a 1:10 ratio, with age-, sex-, and index year-matched controls (n=28,400).
Results
The point prevalence of CAH patients in Korea was 1 in 18,745 persons in 2017. The annual incidence rate declined between 2003 and 2017 from 3.25 to 0.41 per 100,000 persons. CAH patients were at elevated risk for cardiovascular disease (odds ratio [OR], 1.6; 95% confidence interval [CI], 1.4 to 1.9), stroke (OR, 1.7; 95% CI, 1.3 to 2.0), diabetes mellitus (OR, 2.8; 95% CI, 2.6 to 3.1), dyslipidemia (OR, 2.4; 95% CI, 2.2 to 2.6), and psychiatric disorders (OR, 1.5; 95% CI, 1.3 to 1.6). Fracture risk increased in CAH patients aged over 40 years (OR, 1.4; 95% CI, 1.1 to 1.7). CAH patients were at higher risk of mortality than controls (hazard ratio, 1.6; 95% CI, 1.3 to 2.0).
Conclusion
Our nationwide study showed a recent decline in the incidence of CAH and an elevated risk for cardiovascular, metabolic, skeletal, and psychiatric disorders in CAH patients. Lifelong management for comorbidity risk is a crucial component of treating CAH patients.

Citations

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Angelica Lindén Hirschberg
The Journal of Clinical Endocrinology & Metabolism.2024; 109(5): 1202. CrossRef
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Suranut Charoensri, Richard J Auchus
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Eun Young Joo, Myung Ji Yoo, Su Jin Kim, Woori Jang, Ji-Eun Lee
Frontiers in Endocrinology.2024;[Epub] CrossRef
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Robert Krysiak, Hedi L Claahsen-van der Grinten, Nicole Reisch, Philippe Touraine, Henrik Falhammar
Endocrine Reviews.2024;[Epub] CrossRef
Proof of concept for a superior therapeutic index of corticosterone compared with hydrocortisone in patients with congenital adrenal hyperplasia
Catriona J Kyle, Luke D Boyle, Mark Nixon, Natalie Z M Homer, Joanna P Simpson, Alison Rutter, Lynne E Ramage, Alexandra Kelman, Ellen Marie Freel, Ruth Andrew, Brian R Walker, Roland H Stimson
European Journal of Endocrinology.2024; 191(6): 535. CrossRef
Анализ распространенности и заболеваемости надпочечниковой недостаточностью в мире
М. Ю. Юкина, Н. Ф. Нуралиева, Е. А. Трошина
Ateroscleroz.2023; 18(4): 426. CrossRef
Big Data Research in the Field of Endocrine Diseases Using the Korean National Health Information Database
Sun Wook Cho, Jung Hee Kim, Han Seok Choi, Hwa Young Ahn, Mee Kyoung Kim, Eun Jung Rhee
Endocrinology and Metabolism.2023; 38(1): 10. CrossRef
Long-term cardiometabolic morbidity in young adults with classic 21-hydroxylase deficiency congenital adrenal hyperplasia
Beatrice Righi, Salma R. Ali, Jillian Bryce, Jeremy W. Tomlinson, Walter Bonfig, Federico Baronio, Eduardo C. Costa, Guilherme Guaragna-Filho, Guy T’Sjoen, Martine Cools, Renata Markosyan, Tania A. S. S. Bachega, Mirela C. Miranda, Violeta Iotova, Henrik
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Serum steroid profile captures metabolic phenotypes in adults with classic congenital adrenal hyperplasia
Chang Ho Ahn, Jaeyoon Shim, Han Na Jang, Young Ah Lee, Sang-Won Lee, Man Ho Choi, Jung Hee Kim
The Journal of Steroid Biochemistry and Molecular Biology.2023; 234: 106374. CrossRef
Multiplexed Serum Steroid Profiling Reveals Metabolic Signatures of Subtypes in Congenital Adrenal Hyperplasia
Jaeyoon Shim, Chang Ho Ahn, Seung Shin Park, Jongsung Noh, Chaelin Lee, Sang Won Lee, Jung Hee Kim, Man Ho Choi
Journal of the Endocrine Society.2023;[Epub] CrossRef
Long-Term Outcomes of Congenital Adrenal Hyperplasia
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Endocrinology and Metabolism.2022; 37(4): 587. CrossRef

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