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

Table 1 Baseline data between the two groups of patients

	R-TME (n = 45)	L-TME (n = 50)	t/Z/χ2 value	P value
Age [yr, Md (IQR)]	68 (64, 71)	69 (65, 75)	-1.7631	0.078
Gender, n (%)			0.682	0.409
Male	26 (57.7)	33 (66.0)
Female	19 (42.3)	17 (34.0)
BMI (kg/m2, mean ± SD)	23.43 ± 2.52	23.85 ± 3.02	-0.733	0.467
Tumor level from anal verge (cm), n (%)			0.8182	0.664
5-10	25 (55.6)	24 (48.0)
11-15	14 (31.1)	20 (40.0)
> 15	6 (13.3)	6 (12.0)
History of cardiopulmonary disease, n (%)			0.0682	0.794
Yes	21 (46.7)	22 (44.0)
No	24 (53.3)	28 (56.0)
HGB (g/L, mean ± SD)	125.22 ± 12.31	127.22 ± 17.86	-0.6283	0.532
ALB (g/L, mean ± SD)	39.82 ± 2.77	39.19 ± 3.18	1.023	0.31
History of abdominal surgery, n (%)			3.2142	0.073
Yes	9 (20.0)	17 (34.0)
No	36 (80.0)	33 (66.0)
History of neoadjuvant therapy, n (%)			0.2532	0.615
Yes	7 (15.6)	6 (12.0)
No	38 (84.4)	44 (88.0)
ASA level, n (%)			1.1332	0.287
II	30 (66.7)	28 (56.0)
III	15 (33.3)	22 (44.0)

¹Z value.

²χ² value.

³t value.

R-TME: Robot-assisted total mesorectal excision; L-TME: Laparoscopic-assisted total mesorectal excision; BMI: Body mass index; HGB: Hemoglobin; ALB: Albumin; ASA: American Society of Anesthesiologists.