Endoscopic submucosal dissection vs endoscopic mucosal resection for colorectal tumors: A meta-analysis

Table 2 Key characteristics of the included studies

Country	Duration	Patients	Lesions	Mean age (yr)	Tumor size(mm)	Score	Ref.
Japan	2003.1-2006.12	Not mentioned	ESD 145	ESD 64 ± 4	ESD 28 ± 8	******	[9]
			EPM 228	EMR 64 ± 11	EMR 37 ± 14
Japan	2006.4-2009.12	Not mentioned	ESD 89	ESD 66.7 ± 10.7	ESD 38.8 ± 17.3	******	[10]
			EMR 178	EMR 67.9 ± 11.3	EMR 32.2 ± 15.5
Japan	1995.1-2009.12	ESD 85	ESD 85	ESD 64.3 ± 9.2	ESD 31.6 ± 9.0	******	[11]
		EMR 100	EMR 104	EMR599 ± 10.6	EMR 25.5 ± 6.8
Japan	2000.1-2009.2	Not mentioned	ESD 28	ESD 65.1	ESD 27.1	******	[12]
			EMR 56	EMR 65.9	EMR 25
South Korea	2004.1-2009.11	ESD 303;	ESD 314;	ESD 61	ESD 28.9 ± 12.7	******	[13]
		EPMR 67;	EPMR 69;	EMRP 62	EPMR 23.5 ± 5.6
		EMR 135	EMR 140	EMR 63	EMR 21.7 ± 3.5
South Korea	2002.1-2007.12	A total of 203	ESD 58	ESD 63.8 ± 11.6	ESD 30.6 ± 10.6	******	[14]
			ESD-S 57	ESD-S 63.2 ± 10.7	ESD-S 26.4 ± 9.9
			EMR 91	EMR 60.1 ± 10.8	EMR 20.9 ± 7.9

ESD: Endoscopic submucosal dissection; EMR: Endoscopic mucosal resection; EPMR: Endoscopic piecemeal mucosal resection.