Risk Factors for Prolonged Length of Stay of Older Patients in an Academic Emergency Department: A Retrospective Cohort Study

Table 2

Exclusions.

Number of patients	Reason for exclusion
2	Missing LOS	No LOS could be calculated neither automatically nor manually.
2	Administrative mistake	Patient was registered twice.
21	No or incomplete notes	Missing notes.
26	Observation	Patients kept for observation due to a medical reason or a delay in transfer or logistics.
26	Outpatient department (OPD)	Patients primarily admitted to OPD for ophthalmology, oral and maxillofacial surgery, or ENT. For administrative reasons these patients were registered at the ED; however consultation took place at OPD.
15	Procedure in the ED	Patients coming in for a small procedure not involving a physicians’ consultation, e.g., changing or flushing a urinary catheter or cutting a ring.
Total of 92

ED: emergency department
LOS: length of stay
OPD: outpatient department
ENT: ear nose throat