Table 2. Evaluation indexes of the 2 groups ($\overline{x}\pm s$).

Evaluation indexes	SI+1 port	Multiport	P value
Laparoscopic operation time (min)	30.11±5.86	28.45±4.72	0.49
Intraperitoneal blood loss (mL)	34.44±9.82	35.91±6.25	0.69
Number of dissected abdominal lymph nodes	8.44±3.13	7.09±2.12	0.27
Postoperative abdominal drainage days (d)	3.11±0.33	3.00±0.00	0.28
Total postoperative drainage volume of the abdominal cavity (mL)	95.00±23.33	92.27±11.26	0.74
Postoperative complications, n (%)			0.33
Anastomotic fistula	1 (11.11)	2 (9.09)
Pulmonary infection	0	1 (9.09)
Arrhythmia	1 (11.11)	0
Hospital days (d)	9.67±0.71	10.18±0.87	0.17