Robotic-assisted versus laparoscopic colorectal surgery: a meta-analysis of four randomized controlled trials

Table 1 General characteristics of the studies and participants

Author	Year	Country	Group	N	Sex	BMI	ASA grade	Age, years	Disease	Tumor stage	Operation type
Author	Year	Country	Group	N	M/F	BMI	I/II/III/IV	Age, years	Disease	I/ II/III/IV	Operation type
Baik SH	2008	Korea	RCS	18	14/4	22.8 (1.8)	12/6/0/0	57.3 (6.3)	Rectal cancer	5/4/9/0	Tumor-specific mesorectal excision
Baik SH	2008	Korea	LCS	18	14/4	24.0 (2.5)	9/6/1/1	62.0 (9.0)	Rectal cancer	5/4/9/0	Tumor-specific mesorectal excision
Jimenez RR	2011	Spain	RCS	28	12/16	28.59 (2.5)	14/14^a	68.0 (9.1)	Sigmoid colon cancer and rectal cancer	15/13^b	Total or subtotal mesorectal excision
Jimenez RR	2011	Spain	LC S	28	17/11	26.75 (5.6)	20/8^a	61.5 (15.0)	Sigmoid colon cancer and rectal cancer	21/7^b	Total or subtotal mesorectal excision
Park JS	2012	Korea	RCS	35	14/21	24.4 (2.5)	15/16/4/0	62.8 (10.5)	Right-sided colon carcinoma	10/16/9/0	Right colectomies
Park JS	2012	Korea	LCS	35	16/19	23.8 (2.7)	21/12/2/0	66.5 (11.4)	Right-sided colon carcinoma	9/16/10/0	Right colectomies
Patriti A	2009	Italy	RCS	29	11/18	24 (6.2)	2/13/14/0	68 (10)	Rectal cancer	11/9/7/2	Total mesorectal excision
Patriti A	2009	Italy	LCS	37	12/25	25.4 (6.44)	2/14/21/0	69 (10)	Rectal cancer	17/8/10/2	Total mesorectal excision

Values are expressed as mean (SD) or number. BMI, body mass index; ASA, American Society of Anesthesiologists; RCS, robotic-assisted colorectal surgery; LCS, laparoscopic colorectal surgery; M/F, male/female. ^a(I + II)/ III; ^b(T1 + T2)/T3.

ISSN: 1477-7819