Article History
Received: 30 April 2019
Accepted: 7 August 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: The Community Health Survey data are secondary data from the KCDC and the use thereof was approved by the Institutional Review Board (IRB No. 2–2018-0057) of the Yonsei University College of Dentistry. The data used in this study were provided after completion of the user’s agreement available through the KCDC, Community Health Survey website. Informed consent was obtained from all respondents before the survey was initiated.
: Not applicable
: The authors declare that they have no competing interests.