Funding for this research was provided by:
National Research Foundation of Korea (NRF# 2020R1A2C1013497)
Received: 30 April 2020
Accepted: 20 January 2021
First Online: 4 February 2021
Ethics approval and consent to participate
: The KNHANES is a national survey on the health behavior of the people, the prevalence of chronic diseases, nutrition, etc., conducted pursuant to the Korean National Health Promotion Act (Approval Number 117002). The use of KNHANES data is exempt from deliberation by the Public Welfare Research Ethics Deliberation Committee in accordance with Article 2, Paragraph 1 of the Bioethics Act and the Enforcement Rules of the law, so there is no need for administrative permission.
: Not applicable.
: The corresponding author, Seon Young Hwang is an Associate editor of this journal.