Association of Using Long-term Care Services With the Changes in the Level of Care Needed: A Retrospective Study Using a Nationwide Administrative Database in Japan

Introduction: Existing evidence on the effectiveness of interventions for frailty is limited, and it is not known if long-term care insurance services affect changes in the level of care. This study aimed to investigate the relationship between the type of long-term care services used and changes in care level among Japanese individuals ≥65 years old described in a nationwide administrative database in Japan who were unstable when first certified for a care level.