Table 2 Short-term outcomes of matched non-training case and training case colorectal cancer resections

Operation time in minutes (median, range)

160 (70–420)

180 (30–360)

0.072^a

Blood loss in ml (median, range)

10 (0–500)

10 (0–200)

0.224^a

Conversion

0.497^b

5.40(0.24–107)

 No

95 (100%)

93 (97.9%)

 Yes

0 (0%)

2 (2.1%)

Length of stay in days (median, range)

5 (2–29)

4 (2–30)

0.751^a

30-day mortality

0.497^b

0.33 (0.01–8.2)

 No

94 (98.9%)

95 (100%)

 Yes

1 (1.1%)

0 (0%)

Readmission

0.795^b

0.76 (0.28–2.10)

 No

86 (90.5%)

88 (92.6%)

 Yes

9 (9.5%)

7 (7.4%)

Complications

0.097^b

0.66 (0.32–1.38)

 No complications (without mortality)

74 (77.9%)

80 (84.2%)

 Minor leak

6 (6.3%)

3 (3.2%)

 Major leak

2 (2.1%)

0 (0.0%)

 Prolonged ileus

3 (3.2%)

1 (1.1%)

 Prolonged pain

4 (4.2%)

0 (0.0%)

 Wound infection

0 (0.0%)

5 (5.3%)

 Abdominal sepsis

1 (1.1%)

1 (1.1%)

 High stoma output

1 (1.1%)

1 (1.1%)

 Stoma fashioning

1 (1.1%)

2 (2.1%)

 Bleeding

1 (1.1%)

1 (1.1%)

 Urinary tract affection

1 (1.1%)

1 (1.1%)

 Medical condition

1 (1.1%)

0 (0.0%)

Reoperation

1.000^b

0.49 (0.08–5.54)

 No

93 (97.3%)

94 (98.9%)

 Yes

2 (2.1%)

1 (1.1%)

Clavien–Dindo graded complications

0.068^b

0.74 (0.38–1.46)

 No complications

70 (73.7%)

75 (78.9%)

 1

2 (2.1%)

9 (9.5%)

 2

17 (17.9%)

9 (9.5%)

 3a

2 (2.1%)

1 (1.1%)

 3b

2 (2.1%)

1 (1.1%)

 4a

0 (0.0%)

0 (0.0%)

 4b

1 (1.1%)

0 (0.0%)

 5

1 (1.1%)

0 (0.0%)

Major complications (≥3b)

0.368^b

0.29 (0.03–2.21)

 No

91 (95.8%)

94 (98.9%)

 Yes

4 (4.2%)

1 (1.1%)

R stage

0.444^b

0.39 (0.07–2.05)

 R0

90 (94.7%)

93 (97.9%)

 R1 or R2

5 (5.3%)

2 (2.1%)

Lymph node harvest (median, range)

17 (5–56)

15 (3–48)

0.057^a