Objective: What are the quality effects of an emergency medicine (EM) residency, and the associated 24/7 supervision of residents by faculty, in an academic emergency department (ED)? The authors evaluated activity and quality indicators when there were no EM residents present. The hypothesis of the study was that there was no difference between the patient care provided by faculty supervising EM residents and that with an alternative model without EM residents (AbsenceEMResident). Methods: To support the weekly residency educational program (Thursday), EM residents are not scheduled clinically for a 24-hour period (ConfDay). Emergency medicine resident coverage (mean 62.7 hours) was replaced with incremental faculty and mid-level providers (mean 41.0 hours). This study was limited to adult patients (22,527 visits of 39,190 ED total) Emergency medicine (EM) is one of the very few specialties that require full-time, 24/7 faculty supervision for their residents. The founders of the specialty adopted this requirement because of the nature of emergency care and because they believed that residents should have direct supervision and education for all patients who present to the ED, regardless of the hour of presentation.How does this model affect patient care, which in many academic emergency departments (EDs) is largely provided by residents with supervision by faculty attending physicians (faculty)? Does supervision of EM residents result in the same quality when compared with an experienced clinician working without EM residents? Even hospital leaders question the equivalence of care when they specifically request faculty to treat some patients (e.g., VIPs) without resident involvement. There have been relatively few attempts to study and compare quality of care delivered by EM residents supervised by faculty compared with faculty working without EM residents. [1][2][3][4][5][6][7] In order to allow all residents to attend Thursday educational conferences and to also meet the Bell Commission work requirements, 8 our residency program chose to implement a weekly educational schedule that excused EM residents from ED staffing from approximately midnight Wednesday to approximately midnight Thursday. To meet the clinical demands of that period, we developed an alternative staffing model without EM residents (AbsenceEMResident), utilizing additional faculty and mid-level providers (MLPs). No other changes were made to accommodate this weekly educational period (i.e., triage, nurse staffing, off-service resident staffing, and clinical protocols remained consistent).This educational and staffing schedule presented us with the unique opportunity to compare, over a prolonged period of time, several activity and quality indicators of patient care for the two staffing models. Our hypothesis was that there would be no difference for the quality indicators between EM residents working with faculty supervision and the AbsenceEMResident model.