Table 2a.

Characteristics of studies with a follow-up period of 6–11 months

Publication	Study setting	Level of evidence	n (patients)	n (ears)	Age (mean, years) [range]	Follow-up (months) [range]	Dilation instrument; inflation pressure and time
Poe et al., 2011 [13]	Prospective case series	4	11	11	52 [33–76]	Median 7 [6–14]	Acclarent Relieva Solo 7×16 mm; 7 cases 12 bar, 1 min 4 cases 8–10 bar, 1 min
McCoul et al., 2012 [14]	Prospective case series	4	Total 22 0–6 weeks: 22 12 weeks: 19 6 months: 18	35	55	Median 10 [5–14]	Acclarent Relieva Solo 5×24 mm or 7×24 mm; 10 bar, 2 min
Bast et al., 2013 [15]	Retrospective questionnaire study	4	30	NA	50 [24–73]	[6–18]	Spiggle & Theis 3.3×20 mm; inflation pressure and time not reported
Liang et al., 2016 [12]	Prospective randomized controlled trial (unblinded)	1b	90	90	No mean reported [20–52]	6	Spiggle & Theis 3.3×20 mm; 10 bar, 2 min
Bowles et al., 2017 [16]	Prospective case series	4	39	55	46 [19–74]	6	Acclarent Aera 6×16 mm; 12 bar, 2 min