Kim, MD, et al.

Highly frequent users (HFU) of the emergency department (ED) are a poorly defined population. This study describes patient and visit characteristics for Canadian ED HFU and patient subgroups with mental illness, substance misuse, or ≥ 30 yearly ED visits.

Hocker, MD, et al.

We sought to describe ED utilization patterns for different triage levels using the National Hospital Ambulatory Medical Care Survey (NHAMCS) database.

Glover, MD, et al.

We conducted this institutional review board-approved, retrospective study in a large, quaternary care academic center and Level I trauma center.