Table 1 Demographic characteristics of the patients

Gender (male/female)

18 / 5

Cancer (colon / rectum)

14 / 9

Stage (I/II/III/IV)

10 / 6 / 6 / 1

Procedure (lap^a / open)

13 / 10

Age (years)

69 ± 10

41–84

Body weight (kg)

63.7 ± 9.9

47.5–89.0

Body mass index (kg/m²)

24.1 ± 4.1

19.0–34.3

Serum creatinine (mg/dL)

0.84 ± 0.17

0.57–1.3

Creatinine clearance (mL/min)

73.9 ± 21.7

47.2–126.3

Serum albumin (g/dL)

3.8 ± 0.4

3.3–4.6

Operation time (min)

238 ± 73

140–430