Table 1 Patient characteristics

Demography

 Sex (♂/♀) [n]

8/2

7/3

5/5

20/10

p = 0.500

 Age [years]

65.2 ± 9.8

68.4 ± .9.6

59.9 ± 13.29

64.5 ± 11.2

p = 0.238

 Height [cm]

176.5 ± 8.5

176.6 ± 7.3

167.8 ± 110.7

173.6 ± 9.6

p = 0.057

 Weight [kg]

84.7 ± 10.2

83.2 ± 20.8

68.7 ± 15.7

78.9 ± 17.2

p = 0.067

 ASA [score]

2 [1.75−2]

2 [2]

2 [2]

2 [2]

p = 0.484

 SAPS [score]

28.5 ± 10.4

33.9 ± 10.4

26.2 ± 9.47

29.53 ± 10.3

p = 0.234

Comorbidities [n]

 Hypertension

4

7

7

18

p = 0.452

 Coronary heart disease

2

3

0

5

p = 0.321

 PAOD

0

1

1

2

p > 0.999

 Nicotine

4

4

2

10

p = 0.698

 COPD

1

0

1

2

p > 0.999

 Renal insufficiency

1

1

0

2

p > 0.999

 Diabetes

3

3

3

9

p > 0.999

 Alcohol abuse

0

1

4

5

p = 0.094

 Previous opioid medication

0

0

3

3

p = 0.089

Surgeries [n]

 Aortic surgery

1

1

3

5

p = 0.574

 Pancreatic surgery

2

0

3

5

p = 0.321

 Esophagectomy

5

4

2

11

p = 0.321

 HIPEC

1

2

1

4

p > 0.999

 Necrotizing fasciitis

0

1

0

1

p > 0.999

 Spinal fusion

1

2

1

4

p > 0.999

Epidural analgesia [n]

3

2

3

8

p > 0.999