Association Between Emergency Room Evaluation and Recommendations Tool (ER2) Frailty Levels and Incident Adverse Health Events in Older Community Dwellers: Results of the NuAge Study

Older adults' health and functional status are heterogeneous because of the various cumulative effects of chronic diseases and physiologic decline, contributing to a vicious cycle of increased frailty 1-4. Thanks to advances in medicine and hygiene, a growing number of older adults spend more years with a greater range of chronic diseases causing disability but not mortality 5. Health systems need to face this new challenge 4,5. Quantification of frailty and its association with the occurrence of incident adverse health events (i.e., functional decline, unplanned hospitalizations) is crucial to understand how health systems may efficiently respond to this situation 6. This study aims to examine the association of the ER2 tool score and its stratification in three levels for incident adverse health events in older community dwellers and to compare this association with three validity frailty indexes which are the Cardiovascular Health Study (CHS) frailty index, Study of Osteoporotic Fracture (SOF) index and Rockwood frailty index.