Table 1 Patient characteristics (2010–2020)

 Male

8.675 (54.6)

5.311 (64.8)

13.986 (58.1)

 Female

7.208 (45.4)

2.891 (35.2)

10.099 (41.9)

Age (Median)

74

70

73

Localization ¹

 Colon right-sided

9.352 (58.9)

-

9.352 (38.8)

 Colon left-sided

6.423 (40.4)

-

6.423 (26.6)

 Colon others*

108 (0.7)

-

108 (0.4)

 Rectosigmoid junction

-

67 (0.8)

67 (0.3)

 Rectum

-

8.135 (99.2)

8.135 (34.0)

UICC tumor stage

 I

3.373 (21.2)

1.542 (18.8)

4.915 (20.4)

 II

5.611 (35.3)

1.904 (23.2)

7.515 (31.2)

 III

4.157 (26.2)

3.612 (44.0)

7.769 (32.3)

 IV

2.742 (17.3)

1.144 (13.9)

3.886 (16.1)

Surgical approach

 Open

10.194 (64.2)

4.147 (50.6)

14.341 (59.6)

 Laparoscopic

2.357 (14.8)

2.033 (24.8)

4.390 (18.2)

 Conversion

259 (1.6)

589 (7.2)

848 (3.5)

 Others/n. a.

3.073 (19.3)

1.429 (17.4)

4.502 (18.7)

Urgency of surgery

 Elective surgery

10.063 (63.4)

5.723 (69.8)

15.786 (65.5)

 Emergency surgery

1.198 (7.5)

148 (1.8)

1.346 (5.6)

 Unknown/missing

4.622 (29.1)

2.331 (28.4)

6.953 (28.9)

Number of resected lymph nodes

 < 12

1.167 (7.5)

1.006 (12.4)

2.173 (9.2)

 12+

14.451 (92.5)

7.085 (87.6)

21.536 (90.8)

Adjuvant chemotherapy

 no

11.358 (71.5)

4.963 (60.5)

16.321 (67.8)

 yes

4.525 (28.5)

3.239 (39.5)

7.764 (32.2)

Hospital case volume ²

 Low

6.965 (43.9)

4.484 (54.7)

11.449 (47.5)

 High

8.918 (56.1)

3.718 (45.3)

12.636 (52.5)

Year of surgery

 2010–2013

5.374 (33.8)

3.104 (37.8)

8.478 (35.2)

 2014–2017

5.819 (36.6)

2.974 (36.3)

8.793 (36.5)

 2018–2020

4.690 (29.5)

2.124 (25.9)

6.814 (28.3)

GISD, Socio-economic deprivation

 1 - low

3.282 (20.7)

1.584 (19.3)

4.866 (20.2)

 2 - mid-low

3.104 (19.5)

1.694 (20.7)

4.798 (19.9)

 3 - medium

3.106 (19.6)

1.696 (20.7)

4.802 (19.9)

 4 - mid-high

3.624 (22.8)

1.795 (21.9)

5.419 (22.5)

 5 - high

2.767 (17.4)

1.433 (17.5)

4.200 (17.4)

Total number of cases

15,883

8,202

24,085