Table 2.

Perioperative conditions.

Characteristic	Observation group(n=25)	Control group(n=25)	t/χ2	p
Operation time(min, $\overline{x}$ ± s)	118.4 ± 28.2	142.7 ± 25.6	3.184	0.003
Intraoperative blood loss(ml, $\overline{x}$ ± s)	82.5 ± 19.3	126.2 ± 27.4	6.510	<0.001
Total lymph node dissection(n, $\overline{x}$ ± s)	17.2 ± 3.8	16.1 ± 2.9	1.189	0.240
Intraoperative location time of inferior mesenteric artery(min, $\overline{x}$ ± s)	7.2 ± 1.3	8.9 ± 2.1	3.338	0.002
Intraoperative time to locate the left colic artery(min, $\overline{x}$ ± s)	18.5 ± 3.8	24.7 ± 4.5	5.216	<0.001
First postoperative exhaust time(d, $\overline{x}$ ± s)	2.1 ± 1.2	2.9 ± 1.4	2.044	0.046
Stay in the hospital(d, $\overline{x}$ ± s)	9.5 ± 2.2	10.9 ± 2.5	2.033	0.048
Complications (Clavien-Dindo classification) [n(%)]
No complications	10(40)	10(40)	0.706	0.872
GradeI	11(44)	9(36)
GradeII	3(12)	5(20)
GradeIII	1(4)	1(4)