Table 8 Subgroup analyses. Primary and secondary outcomes for patients who were diagnosed with rectal cancer in Sweden 2014–2018 and underwent surgical resection 2014–2018 LAP, ROBOT and OPEN. Unadjusted and adjusted results comparing ROBOT with OPEN

CRM < 1mm^a

41 (3.0)

81 (4.3)

220 (5.8)

1.377 (1.060, 1.789)

 < 0.016

1.032 (0.761, 1.398)

0.840

missing

105 (7.6)

152 (8.1)

355 (9.3)

R1, n**

33 (2.4)

58 (3.1)

168 (4.4)

0.693 (0.512, 0.940)

0.018

0.944 (0.673, 1.324)

0.738

missing

75 (5.4)

83 (4.4)

163 (4.2)

DRM < 1mm^a

2 (0.1)

6 (0.3)

7 (0.2)

0.572 (0.192, 1.704)

0.316

0.627 (0.1784, 2.259)

0.475

missing

107 (7.7)

139 (7.4)

277 (7.2)

30-day mortality

9 (0.7)

8 (0.4)

39 (1.0)

2.412 (1.125, 5.171)

0.024

2.094 (0.896, 4.896)

0.088

missing

0 (0)

0 (0)

0 (0)

90-day mortality

17 (1.2)

17 (0.9)

79 (2.0)

2.312 (1.365, 3.917)

0.002

2.106 (1.174, 3.778)

0.013

missing

0 (0)

0 (0)

0 (0)

Anastomotic leak

51 (3.7)

104 (5.6)

152 (4.0)

0.707 (0.547, 0.913)

0.008

0.772 (0.579, 1.030)

0.079

Re-operation 30-days

123 (8.9)

169 (9.0)

331 (8.7)

0.960 (0.791, 1.166)

0.682

0.914 (0.739, 1.130)

0.404

missing

4 (0.2)

17 (0.9)

37 (1.0)

Re-admission 30-days

256 (18.5)

449 (24.0)

1,086 (28.6)

1.265 (1.114, 1.437)

 < 0.001

1.240 (1.080, 1.423)

0.002

missing

0 (0)

0 (0)

0 (0)

Re-admission 90-days

421 (30.4)

668 (35.8)

1,587 (41.7)

1.289 (1.149, 1.1445)

 < 0.001

1.213 (1.071, 1.373)

0.002

missing

0 (0)

0 (0)

0 (0)

 < 12 lymph nodes in specimen

166 (12.0)

203 (10.9)

473 (12.5)

0.853 (0.716, 1.016)

0.074

0.947 (0.774, 1,158)

0.595

missing

24 (18.5)

34 (1.8)

85 (2.3)