. 2018 Jun 28;24(24):2628–2639. doi: 10.3748/wjg.v24.i24.2628

Table 4.

Characteristics of included studies in the meta-analysis

Ref.	Country	Design	Group	Operation type	Pathology stage
Ref.	Country	Design	Group	Operation type	I	II	III
Noh[15] 2000	South Korea	RCT	U-RY RY	Open	19	22	13
Noh[15] 2000	South Korea	RCT	U-RY RY	Open	32	8	11
Xu et al[16] 2010	China	RCT	U-RY RY	Open	23	63	107
Xu et al[16] 2010	China	RCT	U-RY RY	Open	12	34	59
He et al[17] 2017	China	Retro	U-RY RY	Open	10	31	39
He et al[17] 2017	China	Retro	U-RY RY	Open	4	21	26
Li et al[18] 2011	China	Retro	U-RY RY	Open	13	37	77
Li et al[18] 2011	China	Retro	U-RY RY	Open	5	13	28
Park et al[19] 2014	South Korea	Retro	U-RY RY	Laparoscopic/ Laparoscopy-assisted	N/A
Park et al[19] 2014	South Korea	Retro	U-RY RY	Laparoscopic/ Laparoscopy-assisted	N/A
Huang et al[20] 2017	China	Retro	U-RY RY	Laparoscopic/ Open	22	10	2
Huang et al[20] 2017	China	Retro	U-RY RY	Laparoscopic/ Open	28	21	5

N/A: Not available; RCT: Randomized controlled trial; Retro: Retrospective observational study; RY: Roux-en-Y; U-RY: Uncut Roux-en-Y.