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

Table 1 Inclusion and exclusion criteria

Inclusion criteria	Exclusion criteria
Colorectal tumors diagnosis for every patient has been confirmed by histology	Case report
Comparison of EMR and ESD for the treatment of colorectal tumors	Comment
Written in English	Review
	Letter to editor
	Insufficient data
	Guidelines

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

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.