Comparing short-term outcomes of robot-assisted and conventional laparoscopic total mesorectal excision surgery for rectal cancer in elderly patients

Table 2 Perioperative and pathological data between the two groups of patients

	R-TME (n = 45)	L-TME (n = 50)	t/Z/χ2 value	P value
Operation time [min, Md (IQR)]	145 (125, 187.5)	180 (148.75, 206.25)	-2.8051	0.005
Intraoperative bleeding [mL, Md (IQR)]	80 (40, 100)	100 (30, 162.5)	-0.981	0.327
Conversion to laparotomy, n (%)	0	0	-	-
Transfusion, n (%)	0 (0)	1 (2)	-	1.0
Ostomy, n (%)	16 (35.56)	26 (52.0)	2.8062	0.246
No	29	24
Ileostomy	12	21
Colostomy	4	5
Positive rate of cutting edge, n (%)	0	0	-	-
Number of lymph node dissection [n, Md (IQR)]	16 (12, 20)	15 (12, 17)	1.0931	0.278
Postoperative hospitalization days [d, Md (IQR)]	8 (7, 9)	7 (7, 10)	-0.5661	0.571
Time of first liquid feeding [d, Md (IQR)]	3 (3, 4)	4 (3, 5)	-1.9771	0.048
Drainage tube removal time [d, Md (IQR)]	6 (6, 7)	6 (5, 7)	-0.171	0.865
Foley catheter removal time [d, Md (IQR)]	3 (3, 4.5)	4 (3, 5)	-1.6671	0.096
Expenditure [RMB, Md (IQR)]	77528.84 (67871.24, 92400.57)	61756.95 (54587.1, 71251.51)	-5.2311	< 0.005

¹Z value.

²χ² value.

R-TME: Robot-assisted total mesorectal excision; L-TME: Laparoscopic-assisted total mesorectal excision.