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Table 1: Characteristics of included studies
Study Country Total Sample Size Mean Age (Range) (yr) % Male MR Imaging Magnet <2 mm³ Resolution T2 or FLAIR WI 3D
Kim et al, 2002³ US 225 NA (1–18) 44 1.5 No Yes No
Kumra et al, 2006⁴ US 60 NA (10–21) NA 1.5 No Yes Yes
Seki et al, 2010⁵ Japan 110 NA (5–8) 54 1.5 No Yes Yes
Gur et al, 2013⁶ US 1400 14.8 (8–21) 48 3 Yes No Yes
Kaiser et al, 2015⁷ US 114 8.3 (0.2–18) 41 3 Yes Yes Yes
Monterrey et al, 2017⁸ US 65 10.1 (NA) 71 3 Yes No Yes
Jansen et al, 2017⁹ Netherlands 3966 10.1 (8.6–11.9) 49 3 Yes Yes Yes
Note:—NA indicates not applicable; WI, weighted imaging.

Study	Country	Total Sample Size	Mean Age (Range) (yr)	% Male	MR Imaging Magnet	<2 mm³ Resolution	T2 or FLAIR WI	3D
Kim et al, 2002³	US	225	NA (1–18)	44	1.5	No	Yes	No
Kumra et al, 2006⁴	US	60	NA (10–21)	NA	1.5	No	Yes	Yes
Seki et al, 2010⁵	Japan	110	NA (5–8)	54	1.5	No	Yes	Yes
Gur et al, 2013⁶	US	1400	14.8 (8–21)	48	3	Yes	No	Yes
Kaiser et al, 2015⁷	US	114	8.3 (0.2–18)	41	3	Yes	Yes	Yes
Monterrey et al, 2017⁸	US	65	10.1 (NA)	71	3	Yes	No	Yes
Jansen et al, 2017⁹	Netherlands	3966	10.1 (8.6–11.9)	49	3	Yes	Yes	Yes