Meta-analysis and systematic review of colorectal endoscopic mucosal resection

Table 1 Study characteristics

	Author, yr	Instrument used	n	Type of polyp	Technique
1	Matsushita et al[23], 2003	Snare	935	No information	EMR
2	Imai et al[24], 1999	Snare	30	No information	EMR
3	Igarashi et al[25], 1999	Snare	884	No information	EMR
4	Oka et al[26], 2005	Snare	410	Lateral spreading tumor	EMR
5	Sano et al[27], 2004	Snare	392	Lateral spreading tumor	EMR
6	Hotta et al[28], 2003	Snare	284	Protrusion 68, flat 213, depressed 3	EMR
7	Matsuda et al[29], 2006	Snare	154	Is,Isp 33, LST-G 96, NG 25	EMR
8	Yasumoto et al[30], 2005	Snare	240	LST-G 180, NG 60	EMR
9	Terai et al[31], 2003	Snare	223	Lateral Spreading tumor	EMR
10	Nozaki et al[32], 2006	Snare	198	Ip 3, Isp 34, Is 7, LST-G 85, NG 28	EMR
11	Watari et al[33], 1998	Snare	186	Lateral spreading tumor	EMR
12	Sugisaka et al[34], 2003	Snare	162	No information	EMR
13	Matsunaga et al[35], 1999	Snare	134	No information	EMR
14	Nomura et al[36], 2001	Snare	54	No information	EMR
15	Kobayashi et al[37], 1999	Snare	131	No information	EMR
16	Nakajima et al[38], 2006	Snare	52	No information	EMR
17	Cho et al[39], 1999	Snare	34	No information	EMR
18	Saito et al[40], 2001	Snare	170	Lateral spreading tumor	EMR
19	Tanaka et al[13], 2001	Snare with needle spike	81	Lateral spreading tumor	EMR
20	Ahmad et al[41], 2002	Snare with suction	41	Colon and rectum	EMR
21	Hurlstone et al[42], 2004	Strip technique of Karita	80	Rectal villous adenoma	EMR
22	Hurlstone et al[43], 2005	Strip technique of Karita	62	Rectal villous adenoma	EMR
23	Su et al[44], 2005	Snare with needle spike	152	Colonic nonpolypoid lesions	EMR
24	Uraoka et al[45], 2005	Snare	113	Lateral spreading tumor	EMR
25	Kawamura et al[46], 1999	Snare	19	Submucosal invasive colorectal cancers	EMR

Table 2 Results based on study size

Study size	No. of studies	Successful en-bloc resection (95% CI)	Successful cure en-bloc resection (95% CI)
< 100 patients	9	48.07% (28.36-68.09)	44.19% (24.31-65.09)
100-200 patients	9	68.93% (50.39-84.76)	63.32% (43.50-81.04)
> 200 patients	7	71.39% (52.24-87.20)	69.17% (51.11-84.61)