Is intraperitoneal isoperistaltic side-to-side anastomosis a safe surgical procedure in radical colon cancer surgery

Table 1 Clinical characteristics in the intraperitoneal anastomosis and extraperitoneal anastomosis groups before and after matching, n (%)

	Before matching, IA (n = 70)	Before matching, EA (n = 266)	Before matching, P value	After matching, IA (n = 63)	After matching, EA (n = 63)	After matching, P value
Sex			0.266			0.372
Male	34 (48.6)	149 (56)		32 (50.8)	27 (42.9)
Female	36 (51.4)	117 (44)		31 (49.2)	36 (57.1)
Age, years (mean ± SD)	60.86 ± 11.79	59.72 ± 11.97	0.479	61.33 ± 11.56	60.52 ± 11.35	0.638
BMI, kg/m2 (mean ± SD)	22.40 ± 2.60	22.92 ± 3.08	0.194	22.58 ± 2.60	22.93 ± 2.66	0.481
ASA score			0.762			0.433
2	66 (94.3)	245 (92.1)		59 (93.7)	60 (95.2)
3	4 (5.7)	20 (7.5)		4 (6.3)	2 (3.2)
4	0 (0)	1 (0.4)		0 (0)	1 (1.6)
Comorbidity			1.000			0.854
None	45 (64.3)	171 (64.3)		39 (61.9)	40 (63.5)
Yes	25 (35.7)	95 (35.7)		24 (38.1)	23 (36.5)
Tumor site			< 0.001			1.000
Ileocecum	8 (11.4)	14 (5.3)		7 (11.1)	7 (11.1)
Ascending colon	26 (37.2)	61 (22.9)		26 (41.3)	26 (41.3)
Transverse colon	24 (34.3)	21 (7.9)		18 (28.5)	18 (28.5)
Descending colon	11 (15.7)	43 (16.2)		11 (17.5)	11 (17.5)
Sigmoid	1 (1.4)	103 (38.7)		1 (1.6)	1 (1.6)
Upper rectum	0 (0)	24 (9.0)		0 (0)	0 (0)

IA: Intraperitoneal anastomosis; EA: Extraperitoneal anastomosis; BMI: Body mass index; ASA: American Society of Anesthesiologists.