Supplementary Table 1. Demographics of patients with pT3-4 and preoperative chemoradiation
Before Matching After Matching
Variables Laparoscopy
(N=59)
Robot
(N=22) P Laparoscopy
(N=23)
Robot
(N=22) P
Age, years 62.2 (10.6) 59.5 (9.6) 0.297 60.5 (8.7) 59.5 (9.6) 0.710
BMI, kg/m2 23.1 (3.1) 25.1 (3.1) 0.014 22.7 (2.6) 25.1 (3.1) 0.008
Sex 0.406 0.296
Male 40 (67.8) 17 (77.3) 20 (87.0) 17 (77.3)
Female 19 (32.3) 5 (22.7) 3 (13.0) 5 (22.7)
ASA score 0.417 0.873
1 21 (35.6) 10 (45.5) 11 (47.8) 10 (45.5)
2 38 (64.4) 12 (54.5) 12 (52.2) 12 (54.5)
Tumor height from the anal verge, cm 6.5 (1.8) 6.5 (2.3) 0.883 5.9 (2.0) 6.5 (2.3) 0.299
Location of tumor 0.513 0.848
Mid rectum (> 5cm, ≤ 10 cm) 42 (71.2) 14 (63.6) 14 (60.9) 14 (63.6)
Low rectum (≤ 5 cm) 17 (28.8) 8 (36.4) 9 (39.1) 8 (36.4)
Clinical T stage (initial) 0.825 0.945
T2 1 (1.7) 0 (0.0)
T3 47 (79.7) 18 (81.8) 19 (82.6) 18 (81.8)
T4 11 (18.6) 4 (18.2) 4 (17.4) 4 (18.2)
Clinical N stage (initial) 0.490 0.476
N0 12 (20.3) 2 (9.1) 5 (21.7) 2 (9.1)
N1 24 (40.7) 10 (45.5) 8 (34.8) 10 (45.5)
N2 23 (39.0) 10 (45.5) 10 (43.5) 10 (45.5)
Clinical T stage (before surgery) 0.373 0.445
T1 1 (1.7) 1 (4.5) 0 (0.0) 1 (4.5)
T2 9 (15.3) 2 (9.1) 4 (17.4) 2 (9.1)
T3 44 (74.6) 19 (86.4) 18 (78.3) 19 (86.4)
T4 5 (8.5) 0 ().0) 1 (4.3) 0 (0.0)
Clinical N stage (before surgery) 0.111 0.332
N0 34 (57.6) 18 (81.8) 16 (69.6) 18 (81.8)
N1 22 (37.3) 4 (18.2) 5 (21.7) 4 (18.2)
N2 3 (5.1) 0 (0.0) 2 (8.7) 0 (0.0)
Postoperative chemoradiation 0 (0.0) 0 (0.0) 1.000 0 (0.0) 0 (0.0) 1.000
Postoperative chemotherapy 58 (98.3) 21 (95.5) 0.462 23 (100.0) 21 (95.5) 0.301
Data are shown as number (percentage) of patients or mean (standard deviation) BMI body mass index, ASA American Society of Anesthesiologist
