Table 1. Results of univariate analysis.
| Characteristics | SSI group (N=30) | non-SSI group (N=63) | P value |
|---|---|---|---|
| Gender | |||
| Male vs. female | 23 vs. 7 | 36 vs. 27 | 0.10 |
| Age (years) | 73.1±1.7 | 69.8±1.3 | 0.16 |
| Smoking habit (%) | 4 (13.3) | 6 (9.5) | 0.72 |
| ASA classification | 0.99 | ||
| 1 | 1 (0.0) | 2 (3.2) | |
| 2 or 3 | 29 (100.0) | 61 (96.8) | |
| Body mass index | 21.8±0.4 | 22.0±0.4 | 0.69 |
| Alcohol intake (%) | 1 (3.3) | 3 (4.8) | 0.75 |
| Preoperative biliary drainage (%) | 19 (63.3) | 41 (65.1) | 0.87 |
| Diabetes mellitus (%) | 6 (20.0) | 17 (27.0) | 0.63 |
| Preoperative albumin (g/L) | 3.2±0.1 | 4.1±0.1 | <0.001 |
| Geriatric nutritional risk index | 88.6±1.1 | 100.4±0.9 | <0.001 |
| <94 | 28 | 11 | <0.001 |
| ≥94 | 2 | 52 | |
| Time of operation (min) | 462.8±21.0 | 452.4±12.7 | 0.66 |
| Estimated blood loss (mL) | 712.7±103.5 | 656.2±63.3 | 0.69 |
| Blood transfusion (%) | 9 (30.0) | 19 (30.2) | 0.91 |
| Postoperative pancreatic fistula (%) | <0.001 | ||
| Grade B or C (%) | 20 (66.7) | 10 (15.9) | |
| Postoperative hospital stays (day) | 42.8±3.8 | 22.7±2.0 | <0.001 |
| Rate of organ/space (%) | 28 (93.3) | 0 (0.0) | <0.001 |
The analysis revealed significantly higher incidence of SSI in GNRI <94 patients.