Table 3.

Number of emergency department visits

Study, year	Patients included, n	ED visits 60 days % (n)	ED visits 90 days % (n)	ED visits 1 years % (n)	ED visits 2 years % (n)	ED visits 3 years % (n)
Cho, 2008 [25]	733			25.6% (188)	30% (220)	31.1% (228)
Kellogg, 2009 [26]	1222	3.4% (41)	3.9% (48)
Shah, 2016 [28]	270		27.1% (73)
Groups
Chen 2016 [23]	Total 132		32.6% (43)
	Medicaid 33		48.2% (16)
	Non-Medicaid 99		27.4% (27)
Dallal, 2008 [27]	Total 341	7.6% (26)
	Private practice 217	1.4% (3)
	Academic 124	18.5% (23)
Funk, 2014 [24]	Total 120		15.8% (19)
	Medicaid 30		33.3% (10)
	Non-Medicaid 90		10.0% (9)

ED visits emergency department visits