Laparoscopic VS open hepatectomy for hepatolithiasis: An updated systematic review and meta-analysis

Table 1 Characteristics of included studies

Ref.	Level of evidence	Design	Patient No.		Location of stone	F/U, mo	Matching	Quality score
			LH	OH		LH/OH
Cai et al[16], 2007	3b	Re	29	22	L+R	16.1/16.1	1,2,3,4,5	7
Ding et al[17], 2015	2b	RCT	49	49	L	Perioperative	1,2,3,5	RCT
Li, H et al[18], 2008	4	Re	14	20	L+R	Perioperative	1,2	5
Jin et al[19], 2015	3b	Re	96	105	L	18-90	1,2,3,6,7	5
Kim et al[20], 2015	3a	Re	17	17	R	35/35	1,3,4,5	7
Lee et al[21], 2014	3b	Re	7	9	L	12.1/11.1	1,2,4,6	6
Li, J et al[22], 2014	3b	Re	35	40	L+R	41/41	1,2,3	6
Li, Y et al[23], 2015	3b	Re	23	22	L+R	15-51	1,2,3,6	5
Namgoong et al[24], 2014	3b	Re	37	112	L	NA	1,2,3,4	7
Peng et al[25], 2016	3a	Re	36	39	L	18.9/20	1,2,3,4	7
Shin et al[26], 2015	3b	Re	40	54	L	46.8/75.7	1,2,6	5
Song et al[27], 2010	3b	Re	7	10	L	Perioperative	1,2,3,4,5	7
Tian et al[28], 2013	3b	Re	116	78	L+R	29/29	1,2,4	6
Tu et al[29], 2010	3b	Re	28	33	L	17/17	1,2,3,4	7
Ye et al[30], 2015	3a	Re	46	51	L	33/33	1,2,3,4	7
Zhou et al[31], 2013	3b	Re	44	44	L+R	24/24	1,2,3,4,5,6,7	7

1: Age; 2: Sex; 3: Liver function; 4: Previous upper surgery history; 5: Surgeon experience; 6: Body mass index; 7: American Society of Anesthesiologists score. F/U: Follow-up, mean or median or range, month; L: Left intrahepatic; LH: Laparoscopic hepatectomy; NA: Not available; OH: Open hepatectomy; R: Right intrahepatic; RCT: Randomized controlled trail; Re: Retrospective.