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Table 1 Patient characteristics and clinicopathological outcomes between RTME and LTME

From: Comparison of the operative outcomes and learning curves between laparoscopic and “Micro Hand S” robot-assisted total mesorectal excision for rectal cancer: a retrospective study

  RTME (n = 40) LTME (n = 65) p value
Age (year) 57.4 ± 9.5 60.2 ± 10.8 0.178
Male 20 (50.0) 31 (47.7) 0.818
BMI (kg/m2) 21.8 ± 2.9 22.2 ± 4.2 0.577
ASA (I/II/III) 19/16/5 (47.5/40.0/12.5) 23/28/14 (35.4/43.1/21.5) 0.353
Distance from AV (cm) 8.2 ± 2.9 7.5 ± 3.2 0.299
CRT 5 (12.5) 5 (7.7) 0.415
Procedure type    1.000
LAR 38 (95.0) 61 (93.8)  
APR 2 (5.0) 4 (6.2)  
Operative time (min) 339.3 ± 45.3 320.8 ± 52.8 0.070
Blood loss (ml) 140.9 ± 68.5 188.0 ± 73.0 0.001
Conversion 1 (2.5) 3 (4.6) 1.000
Protective ileostomy 22 (55.0) 31 (51.7) 0.744
Hospital stay (day) 9.2 ± 3.8 11.9 ± 3.9 0.001
Tumor size (cm) 3.4 ± 1.4 3.8 ± 1.5 0.240
Retrieved lymph node 15.3 ± 4.9 15.6 ± 5.3 0.774
pTNM (I/II/III) 4/11/25 (10.0/27.5/62.5) 13/15/37 (20.0/23.1/56.9) 0.395
DRM (cm) 2.4 ± 1.3 2.5 ± 1.5 0.804
Involved DRM 0 0
Involved CRM 2 (5.0) 0 0.143
Grade of differentiation    0.846
Poor 12 (30.0) 15 (23.1)  
Moderate 17 (42.5) 30 (46.2)  
Well 8 (20.0) 13 (20.0)  
Others 5 (12.5) 7 (10.7)  
Quality of TME    0.897
Complete 31 (77.5) 48 (73.8)  
Nearly complete 6 (15.0) 12 (18.5)  
Incomplete 3 (7.5) 5 (7.7)  
  1. BMI body mass index, ASA American Society Anesthesia, AV anal verge, CRT chemoradiation therapy, LAR low anterior resection, APR abdominal perineal resection, DRM distal resection margin, CRM circumferential resection margin, TME total mesorectal excision. Values are presented as mean ± standard deviation, n or n (%)