This is a Wharton professor who took an operations modeling look at ED LWBS rates, stratified by Emergency Severity Index. Using timestamp data from 150,000 ED visits, this approach derived four reasonable conclusions:
- For patients with moderate severity, observing additional patients in the queue lead to increased abandoment.
- Additional arrivals into the waiting room increased abandonment, while departures decreased abandonment.
- Watching an arrival "queue-jump" due to higher acuity level increased chance of abandonment.
- Initiation of diagnostic testing – such as triage protocols – reduced abandonment even if overall wait time was unchanged.
"Waiting Patiently: An Empirical Study of Queue Abandonment in an Emergency Department"