Comparison of different anastomosis methods in laparoscopically assisted left hemicolectomy for colon cancer

Table 1 Comparison of the clinical data of the end-to-side anastomosis and side-to-side anastomosis groups, n (%)

Parameter	Group ESA	Group SSA	χ²	P value
n = 334	146 (43.7)	188 (56.3)
Age (year)			0.183	0.669
≤ 60	71 (48.6)	87 (46.3)
> 60	75 (51.4)	101 (53.7)
Sex			0.001	0.991
Male	90 (61.6)	116 (62.7)
Female	56 (38.4)	72 (38.3)
Patient center			0.858	0.354
Xiamen	42 (28.8)	63 (33.5)
Fuzhou	104 (71.2)	125 (66.5)
BMI (kg/m2)			3.728	0.054
≤ 22	56 (38.4)	92 (48.9)
> 22	90 (61.6)	96 (51.1)
Tumor location			3.171	0.075
Descending	39 (26.7)	47 (36.7)
Descending-sigmoid junction	107 (73.3)	81 (63.3)
TNM stage			0.072	0.789
II	86 (58.9)	108 (57.4)
III	60 (41.1)	80 (42.6)
Histological differentiation			0.652	0.419
Medium/high	128 (87.7)	159 (84.6)
Low/mucinous/signet ring cell carcinoma	18 (12.3)	29 (15.4)
Size of primary tumor (cm)			2.414	0.12
≤ 5.0	102 (69.9)	116 (61.7)
> 5.0	44 (30.1)	72 (38.3)
High ligation inferior mesenteric artery			2.569	0.109
Yes	75 (51.4)	80 (42.6)
No	71 (48.6)	108 (57.4)
Preoperative intestinal obstruction			0.003	0.96
Yes	23 (15.8)	30 (16.0)
No	123 (84.2)	158 (84.0)
CEA (ng/mL)			0.795	0.373
≤ 5.0	91 (62.3)	126 (67.0)
> 5.0	55 (37.7)	62 (33.0)
Hb (g/L)			3.495	0.062
≤ 10	9 (6.2)	23 (12.2)
> 10	137 (93.8)	165 (87.8)		≤ 0.001
Postoperative chemotherapy (half a year)			0.032	0.858
Yes	77 (52.7)	101 (53.7)
No	69 (47.3)	87 (46.3)

ESA: End-to-side anastomosis; SSA: Side-to-side anastomosis; CEA: Carcinoembryonic Antigen; Hb: Hemoglobin; BMI: Body mass index.