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Article History

Received: 17 March 2023

Accepted: 29 August 2023

First Online: 12 September 2023

Declarations

:

: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

: Before the examinations, all KNHANES participants received written informed permission, which was performed by the Korea Centers for Disease Control and Prevention's Health and Nutrition Examination Department. The KNHANES investigation commission authorized this study. These surveys were approved by the KNHANES inquiry commission (IRB Approval numbers: 2009-01CON-03-2C, 2010-02CON-21-C, 2011-02CON-06-C, 2012-01EXP-01-2C, 2013-07CON-03-4C, 2013-12EXP-03-5C). From 2016 to 2017, KNHANES was exempt from evaluation for research ethics under the Bioethics and Safety Act.