1. Department of Health Services Research University of Tsukuba Tsukuba Ibaraki Japan
2. Department of Clinical Epidemiology and Health Economics School of Public Health Graduate School of Medicine The University of Tokyo Bunkyo‐ku Tokyo Japan
3. Division of Gerontological Nursing Faculty of Nursing and Medical Care Keio University Fujisawa‐shi Kanagawa Japan
4. Major in Nursing Graduate School of Health Management Keio University Fujisawa‐shi Kanagawa Japan
5. Yamato Homecare Clinic Osaki Osaki‐shi Miyagi Japan
6. Department of Gerontological Nursing and Care System Development Graduate School of Health Care Sciences Tokyo Medical and Dental University Bunkyo‐ku Tokyo Japan
7. Department of Health Policy and Informatics Graduate School of Medicine Tokyo Medical and Dental University Bunkyo‐ku Tokyo Japan