Table 2.

Frequent presenter definitions

Author	Year	Frequent Presenter’ Definition
Crane	2012	≥6 visits/ year
DeHaven	2012	≥2 visits/ year
Edgren	2016	≥3 visits in previous 6 months
Enard	2013	Extracted data from > 5 visits pre intervention period.
Grimmer-Somers	2010	Individuals known to use public hospital ED services in an unplanned manner.
Grover	2018	≥10 visits in 12 months, ≥6 visits in 6 months, ≥4 visits in 1 month or concerned ED use.
Hardin	2017	≥3visit/ year
Lin	2017	Patients with the most ED visits in the previous month and previous year.
Murphy	2013	Frequent = 3–11 visits per year, Extreme = ≥12 visits/year preceding year of enrolment.
Navratil-Strawn	2014	≥3 visits/ year in the previous 12 months
Okin	2000	≥5 visits/ year
Reinius	2012	≥3 visits during 6 months before inclusion.
Seaberg	2017	≥5 visits/ year
Shumway	2008	≥5 visits/ year
Stokes-Buzzelli	2010	Patients with the most ED visits.
Tadros	2012	≥10 visits/ year