Table 1 Demographic characteristics of the patients
| Parameter | Numbers | Mean ± SD | Range |
|---|---|---|---|
| Gender (male/female) | 18 / 5 | ||
| Cancer (colon / rectum) | 14 / 9 | ||
| Stage (I/II/III/IV) | 10 / 6 / 6 / 1 | ||
| Procedure (lapa / 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 |