Table II.

Demographic characteristics of the included studies.

Authors	Patient no.	Agea, years	Study type	Patient enrollment	Time of study	(Refs.)
Tateishi et al	117	42±21	Prospective	Consecutive	Unclear	(6)
Strobel et al	50	36.9 (11–72)	Prospective	Consecutive	Unclear	(7)
Shin et al	91	42 (6–79)	Retrospective	Unclear	2004.5–2007.6	(8)
Charest et al	212	47±19.2	Retrospective	Consecutive	2004.5–2008.4	(9)
Pepirkova et al	93	50.1±14.9	Retrospective	Unclear	2004.1–2007.5	(10)
Fuglø et al	89	NA	Retrospective	Unclear	2001.12–2010.12	(11)
Sharma et al	53	20.1±10.5	Retrospective	Unclear	2006.3–2012.1	(12)
Xu et al	103	59.1±18.6	Retrospective	Unclear	2007.3–2013.2	(13)
Byun et al	206	15 (4–71)	Retrospective	Consecutive	2006.1–2011.11	(14)
Iagaru et al	14	36±14	Retrospective	Consecutive	1999.1–2004.12	(15)
Evilevitch et al	42	17 (7–31)	Prospective	Consecutive	2005.1–2007.1	(16)
Hamada et al	11	17 (10.68)	Prospective	Consecutive	2002.6–2006.8	(17)
Benz et al	12	31.6±15.0	Prospective	Consecutive	2005.2–2007.11	(18)
Im et al	20	15 (10–25)	Prospective	Consecutive	2003.8–2010.7	(19)
Byun et al	27	15 (10–23)	Prospective	Consecutive	2010.5–2012.3	(20)
Byun et al	31	15 (10–21)	Prospective	Consecutive	2010.5–2013.9	(21)

^aPresented as mean ± standard deviation of median (range). NA, not available.