“…To explore the utility of the HARS score in clinical practice, patients were classified into low-, intermediate-, and high-risk groups according to the MACE rate (14-17). However, existing literature uses different boundaries for low-, intermediate-, and high-risk for patients with chest pain (3)(4)(5)(6)(7)(18)(19)(20)(21)(22)(23). In this study, we defined the boundaries of low, intermediate, and high risk as ≤2%, >2% but <20%, and ≥20%, respectively, based on the study population, events, and follow-up time.…”