Funding for this research was provided by:
Japan Society for the Promotion of Science (17K12921)
Received: 6 February 2020
Accepted: 17 November 2020
First Online: 25 November 2020
Ethics approval and consent to participate
: The present analysis was based on secondary analysis of observational survey data. Under the Shiga prefecture government anonymized all individual-level data before providing the authors with the datasets for this study. No ethical review was sought based on the Ethical Guidelines for Medical and Health Research Involving Human Subjects, because this present study used only information that had already been anonymized.
: Not applicable.
: The authors declare that they have no competing interests.