Endocrinology and Metabolism

Seong Hoon Jeon (Jeon SH)

2 Articles

Association between Cigarette Smoking and Thyroid Function in Adults without Previous History of Thyroid Disease.: Bo Hyun Kim, Won Bae Kim, Tae Yong Kim, Hong Kyu Kim, Seong Hoon Jeon, Chang Won Lee, Young Kee Shong; J Korean Endocr Soc. 2008;23(2):123-128. Published online April 1, 2008; DOI: https://doi.org/10.3803/jkes.2008.23.2.123

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BACKGROUND
Cigarette smoking has a significant impact on thyroid function. However, the association between smoking and thyroid function is incompletely understood. METHODS: We conducted a cross-sectional study that included 90,970 adults (age range: 20 to 79) who had visited the health promotion center at Asan Medical Center between January 1, 2001, and December 31, 2003. Those subjects with previous known thyroid disease, a history of thyroid operation, a history of thyroid function altering medication (herb, estrogen or digestive) or a family history of thyroid disease were excluded. Finally, 47,577 subjects (males: 30,726, females: 16,851) were included in this study. We calculated the age-adjusted geometric mean of the serum TSH and the age-adjusted mean of the serum free T4 among the current, former and never smokers. We also analyzed the age-adjusted prevalence of hypothyroidism and hyperthyroidism among each group. RESULTS: Among men, the geometric mean TSH level was significantly low in the current (1.40 mIU/L, 95% confidence interval [CI]: 1.38-1.41) and former smokers (1.59 mIU/L, 95% CI: 1.57-1.61) compared with the never smokers (1.65 mIU/L, 95% CI: 1.63-1.68). The mean free T4 level was high in the current smokers (1.236 ng/dL, 95% CI: 1.234-1.239) compared with the never smokers (1.234 ng/dL, 95% CI: 1.230-1.238). Similarly, among women, the geometric mean TSH level was low in the current smokers (1.75 mIU/L, 95% CI: 1.67-1.87) compared with the never smokers (1.85 mIU/L, 95% CI: 1.83-1.87). The mean free T4 level was high in the current smokers (1.149 ng/dL, 95% CI: 1.139-1.159) compared with the never smokers (1.138 ng/dL, 95% CI: 1.135-1.140). Among the current male smokers, heavy daily smoking (over 2 packs per day) was more associated with low TSH levels than moderate smoking (less than 1 pack per day). In men, the prevalence of subclinical hypothyroidism was low in the current smokers compared with the never smokers (odds ratio: 0.53, 95% CI: 0.43-0.66). CONCLUSION: We found that current smokers had lower TSH levels and higher free T4 levels than never smokers in both men and women and smoking was associated with a low prevalence of subclinical hypothyroidism in men, which may be of importance when evaluating subjects with subclinical hypothyroidism in Korea.

Citations

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Reference interval for thyrotropin in a ultrasonography screened Korean population
Mijin Kim, Tae Yong Kim, Soo Han Kim, Yunkyoung Lee, Su-yeon Park, Hyung-don Kim, Hyemi Kwon, Yun Mi Choi, Eun Kyung Jang, Min Ji Jeon, Won Gu Kim, Young Kee Shong, Won Bae Kim
The Korean Journal of Internal Medicine.2015; 30(3): 335. CrossRef
Clinical Review of Thyroid Dysfunction in the Subjects for Health Check-up
Ji Eun Park, Ho Chan Cho
Journal of Korean Thyroid Association.2012; 5(1): 52. CrossRef
Thyroid Dysfunction of North Korean Women Living in South Korea, Focusing on Subclinical Hypothyroidism
Joo Hyung Kim, Sol Ah Park, Nam Hoon Kim, Jae Hee Ahn, Yoon Jung Kim, Myongjin Cho, Yoon Jung Lee, Hye Jin Yoo, Hee Young Kim, Ji A Seo, Nan Hee Kim, Kyung Mook Choi, Sei Hyun Baik, Dong Seop Choi, Sin Gon Kim
Endocrinology and Metabolism.2012; 27(3): 200. CrossRef

Prevalence of Ultrasonographically-Detected Thyroid Nodules in Adults without Previous History of Thyroid Disease.: Ji Hye Suk, Tae Yong Kim, Mi Kyung Kim, Won Bae Kim, Hong Kyu Kim, Seong Hoon Jeon, Young Kee Shong; J Korean Endocr Soc. 2006;21(5):389-393. Published online October 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.5.389

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Abstract PDF

BACKGROUND
The prevalence of palpable thyroid nodules in the general population is about 5%, and is 3~5 times higher in women than in men. However, much higher prevalence, up to 50%, was reported from autopsy data. Recently, the use of high resolution ultrasonography for routine check-up has resulted in much more detection of non-palpable thyroid nodules. We studied the prevalence of thyroid nodules in healthy adults without history of thyroid disease, and compared the prevalence in relation to palpability, age and gender. METHODS: The prevalence of thyroid nodules was studied in adults aged from 20 to 79 years who had visited the health promotion center at Asan Medical Center, Seoul, Korea, from Jan 2002 to Dec 2003. Subjects with previous thyroid disease were excluded. 7,440 subjects (6,168 female, 1,272 men) were included in this study. Thyroid palpation was performed and followed by ultrasonography using a 12-MHz real-time scanner. RESULTS: Thyroid nodules were detected in 3,040 of the 7,440 subjects (41%). Palpable nodules were present in 213 (3%), and non-palpable, but ultrasonographically detected thyroid nodules were present in 2,827 (38%). Thyroid nodules were present in 2,602 women (42.2%) and 370 men (29%). Among them, 159 women (2.6%) and 54 men (4.2%) had palpable thyroid nodules and 2,443 women (39.6%) and 316 men (24.8%) had non-palpable but ultrasonographically detected nodules. A significant linear trend was found between age and the prevalence of thyroid nodules. CONCLUSIONS: The prevalence of ultrasonographically detected thyroid nodules in adults with no previous history of thyroid disease was 41%. The prevalence of palpable nodules and non-palpable, but ultrasonographically detected nodules were 3% and 38%, respectively. Thyroid nodules were detected in 42.2% of women and 29% of men, showing that thyroid nodules are very common in healthy adults, even in men.

Citations

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The Prevalence of Thyroid Nodules and the Morphological Analysis of Malignant Nodules on Ultrasonography
An Hyun, Ji Tae-jeong, Lee Hyo-young, Im In-chul
Journal of Radiological Science and Technology.2019; 42(3): 201. CrossRef
Prevalence of thyroid nodules and their associated clinical parameters: a large-scale, multicenter-based health checkup study
Jae Hoon Moon, Min Kyung Hyun, Ja Youn Lee, Jung Im Shim, Tae Hyuk Kim, Hoon Sung Choi, Hwa Young Ahn, Kyung Won Kim, Do Joon Park, Young Joo Park, Ka Hee Yi
The Korean Journal of Internal Medicine.2018; 33(4): 753. CrossRef
Prevalence and Annual Incidence of Thyroid Disease in Korea from 2006 to 2015: A Nationwide Population-Based Cohort Study
Hyemi Kwon, Jin-hyung Jung, Kyung-Do Han, Yong-Gyu Park, Jung-Hwan Cho, Da Young Lee, Ji Min Han, Se Eun Park, Eun-Jung Rhee, Won-Young Lee
Endocrinology and Metabolism.2018; 33(2): 260. CrossRef
An Iodine Database for Common Korean Foods and the Association between Iodine Intake and Thyroid Disease in Korean Adults
Mi-Rhan Han, Dal Lae Ju, Young Joo Park, Hee-Young Paik, YoonJu Song
International Journal of Thyroidology.2015; 8(2): 170. CrossRef
Management of Thyroid Nodules and Cancers Arising in the Elderly
Eunyoung Kim, June Young Choi, Kyu Eun Lee
Journal of Korean Thyroid Association.2012; 5(2): 99. CrossRef
Screening of Thyroid Cancer and Management of Thyroid Incidentaloma
Jung Jin Cho
Korean Journal of Family Medicine.2010; 31(2): 87. CrossRef
Postoperative Findings of the Cytological Diagnosis of Follicular Neoplasm or Hürthle Cell Neoplasm and the Risk of Malignancy
Ji Hye Yim, Eui Young Kim, Won Gu Kim, Tae Yong Kim, Gyungyup Gong, Suck Joon Hong, Won Bae Kim, Young Kee Shong
Endocrinology and Metabolism.2010; 25(4): 316. CrossRef
Prevalence of Thyroid Nodules Detected by Ultrasonography in Adults for Health Check-up and Analysis of Fine Needle Aspiration Cytology
Jae Hoon Chung
Journal of Korean Endocrine Society.2008; 23(6): 391. CrossRef
Prevalence of Thyroid Nodules Detected by Ultrasonography in Adults for Health Check-Ups and Analysis of Fine Needle Aspiration Cytology
Won Jun Kim, Joo Hyong Kim, Dong Won Park, Chang Beom Lee, Yong Soo Park, Dong Sum Kim, Woong Hwan Choi, Tae Wha Kim, You Hern Ahn
Journal of Korean Endocrine Society.2008; 23(6): 413. CrossRef
Trends Analysis of Characteristics of Thyroid Cancer Patients in One Medical Center
Seung Hun Lee, Tae Yong Kim, Jin-Sook Ryu, Gyungyub Gong, Won Bae Kim, Seong Chul Kim, Suck Joon Hong, Young Kee Shong
Journal of Korean Endocrine Society.2008; 23(1): 35. CrossRef
Prevalence of Thyroid Nodules Detected by Ultrasonography in Adult Men Attending Health Check-ups
Jung Hyun Kim, Sang Jun Park, Sang Eok Kim, Kwang Hee Lee, Il Kwon Cho, Sun Ik Jang, Jin Kwan Lee, Keum Soo Seo, Hyuck Po Kwon, Sung Chang Chung
Journal of Korean Endocrine Society.2007; 22(2): 112. CrossRef

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