Text and Data Mining valid from 2020-04-15
Received: 10 September 2019
Accepted: 6 April 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: This study was exempt from the Research Ethics Committee of the Graduate School of Medicine, The University of Tokyo, Japan, as the data set did not include any personally identifiable information. Prior to this study, the CDC approved the protocol for all YRBS conducted in the US. The survey was designed to protect adolescents’ privacy through anonymity and encourage voluntary participation. Before administering the survey, local parental permission procedures were followed. Data were obtained from the CDC upon request.
: Not applicable.
: The authors declare that they have no competing interests.