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Table 4 Postoperative complications and histopathological results

From: Lower conversion rate with robotic assisted rectal resections compared with conventional laparoscopy; a national cohort study

  LR RR p values* CC** CL*** p values*
30-day mortality 3 (0.3) 2 (0.2) 0.592 1 (1.1) 4 (0.3) 0.280
90-day mortality 11 (1.2) 5 (1.3) 0.856 3 (3.2) 13 (1.1) 0.081
Major complications 112 (12.3) 43 (11.5) 0.669 20 (21.2) 135 (11.4) 0.005
Conversion rate 87 (9.6) 8 (2.1)  < 0.001    
Anastomotic leak 27 (4.9) 14 (7.7) 0.203 5 (8.3) 36 (5.3) 0.319
Reoperation 71 (7.8) 35 (9.3) 0.367 13 (12.3) 93 (7.8) 0.046
Tumor perforation 5 (0.6) 2 (0.6) 0.988 3 (3.8) 4 (0.4)  < 0.001
LOSa median (IQR) 6 (4–9) 5 (3–7) 0.001 8 (6–12) 6 (4–8) 0.001
Single-organ failure 22 (2.4) 5 (1.3) 0.217 3 (3.2) 24 (2.0) 0.456
Multi-organ failure 3 (0.3) 2 (0.5) 0.595 2 (2.1) 3 (0.3) 0.005
Histopathological results
  LR RR p values CC CL p values
Positive CRMb 35 (4.6) 16 (4.8) 0.885 9 (10.2) 42 (4.2) 0.010
Positive DRMc 6 (0.8) 1 (0.3) 0.376 1 (1.1) 6 (0.6) 0.547
Median DRMc (IQR) 3.0 (1.8–4.0) 3.5 (2.0–4.5) 0.002 2.6 (2.0–4.0) 3.0 (2.0–4.4) 0.367
Median PRMd (IQR) 15.0 (11.0–20.0) 13.5 (10.0–17.0) 0.001 18.0 (12.0–23.0) 14.0 (10.3–19.0) 0.001
L.nodee median (IQR) 16 (12–21) 13 (11–17) 0.001 16 (13–22) 15 (12–20) 0.505
Stagef  
 1 196 (41.4) 66 (36.1) 0.486 14 (28.6) 248 (40.8) 0.135
 2 121 (25.5) 38 (20.8)   11 (22.5) 148 (24.3)  
 3 108 (22.8) 54 (29.5)   14 (28.6) 148 (24.3)  
 4 49 (10.3) 25 (13.7)   10 (20.4) 64 (10.5)  
  1. Values in parentheses are percentages unless indicated otherwise
  2. LR laparoscopic resections, RR robotic resections
  3. *Chi-square analyses
  4. **Converted cases
  5. ***Completed laparoscopically
  6. aLOS, In-hospital length of stay
  7. bCircumferential resection margin. Missing values in this variable n = 194
  8. cDistal resection margin, measured in centimeters. Missing values in this variable n = 209
  9. dProximal resection margin, measured in centimeters. Missing values in this variable n = 280
  10. eLymph nodes yielded
  11. fMissing values in this variable n = 627