About the Authors

Shinichiro Ishikawa

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Resources, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

yukiteigokuraku@gmail.com

Affiliation Department of Cardiovascular Medicine, Jikei University School of Medicine, Minato, Tokyo, Japan

Yusaku Hayashi

Roles Data curation, Investigation, Resources, Visualization

Affiliation Department of Internal Medicine, Tsunan Town Hospital, Tsunan, Niigata, Japan

Toshiyuki Abe

Roles Formal analysis, Investigation, Software, Visualization

Affiliation Former Tokamachi Public Health Center, Tokamachi, Niigata, Japan

Susumu Tanaka

Roles Formal analysis, Investigation, Software, Visualization

Affiliation Former Niigata Prefectural Welfare and Health Department, Health and Welfare Division, Niigata, Niigata, Japan

Competing Interests

In this study, the SMR values were calculated using the Niigata Prefecture SMR Calculation Sheet Version 0.71 devised by Susumu TANAKA. This report concerns an investigator-initiated study, and the authors have no conflicts of interest to disclose with respect to this report.