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Prevalence of thyroid nodules and their associated clinical parameters: a large-scale, multicenter-based health checkup study

  • Moon, Jae Hoon (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Hyun, Min Kyung (Department of Preventive Medicine, Dongguk University College of Korean Medicine) ;
  • Lee, Ja Youn (National Evidence-based Healthcare Collaborating Agency) ;
  • Shim, Jung Im (National Evidence-based Healthcare Collaborating Agency) ;
  • Kim, Tae Hyuk (Department of Internal Medicine, Seoul National University Hospital) ;
  • Choi, Hoon Sung (Department of Internal Medicine, Kangwon National University Hospital) ;
  • Ahn, Hwa Young (Department of Internal Medicine, Chung-Ang University Hospital) ;
  • Kim, Kyung Won (Department of Internal Medicine, Seoul National University Hospital Healthcare System Gangnam Center) ;
  • Park, Do Joon (Department of Internal Medicine, Seoul National University Hospital) ;
  • Park, Young Joo (National Evidence-based Healthcare Collaborating Agency) ;
  • Yi, Ka Hee (Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center)
  • Received : 2015.08.12
  • Accepted : 2016.06.13
  • Published : 2018.07.01

Abstract

Background/Aims: We evaluated the prevalence and characteristics of thyroid nodules detected by thyroid ultrasound (US) at health checkups and the associated clinical parameters. Methods: A total of 72,319 subjects who underwent thyroid US at three health checkup centers in Korea from January 2004 to December 2010 were included in this study. The correlations between the presence of thyroid nodules and other clinical parameters were analyzed. Results: The prevalence of thyroid nodules and cysts was 34.2% (n = 24,757). Thyroid nodules were more prevalent in women and older age groups. Among the subjects with thyroid nodules with size information (n = 24,686), 18,833 (76.3%) had nodules measuring ${\leq}1.0cm$. Women and older age groups showed higher proportion of larger nodules. Percentage of women, age, body mass index (BMI), waist circumference, body fat composition, blood pressure, and the level of fasting glucose, total cholesterol, and low density lipoprotein cholesterol were higher in the subjects with thyroid nodules compared to those without nodules. The prevalence of metabolic syndrome and overt/subclinical thyrotoxic state was higher in the subjects with thyroid nodules. In the multivariable logistic regression analysis, women, age, BMI, metabolic syndrome, and thyrotoxicosis were independently associated with the presence of thyroid nodules. Conclusions: The high prevalence of thyroid nodules in people who underwent thyroid US at a health checkup suggests that increased detection of thyroid nodules resulted in an increased prevalence in the general population. However, metabolic disturbances may also have contributed to the increase in thyroid nodule prevalence in Korea.

Keywords

Acknowledgement

Supported by : National Evidence-based Healthcare Collaborating Agency(NECA), Korean Foundation for Cancer Research

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