Table 4 The difference in patients' background according to the presence of postoperative SSI
| Â | SSI+ | SSI- | P= |
|---|---|---|---|
Gender | 0.66 | ||
 Male | 17 (68.0%) | 107 (61.5%) | |
 Female | 8 (32.0%) | 67 (38.5%) | |
Age (years)* | 66.5 (57.2–74.3) | 69.5 (63.0–74.7) | 0.28†|
Operative procedure | 0.16 | ||
 Colectony | 14 (56.0%) | 124 (71.3%) | |
 Rectal resection | 11 (44.0%) | 50 (28.7%) | |
Body mass index | |||
 Normal | 4 (16.0%) | 18 (10.3%) | 0.3 |
 Intermediate | 15 (60.0%) | 130 (74.7%) | |
 High | 6 (24.0%) | 15 (15.0%) | |
Diabetes mellitus | 0.79 | ||
 Normal | 36 (90.0%) | 138 (86.8%) | |
 Abnormality | 4 (10.0%) | 21 (13.2%) | |
ASA | 0.28 | ||
 I | 16 (64.0%) | 97 (55.7%) | |
 II | 8 (32.0%) | 72 (41.4%) | |
 III | 1 (4.0%) | 5 (2.9%) | |
Operating time (min)* | 263 (182–328) | 216 (180–280) | 0.16†|
Intraoperative bleeding (ml)* | 20 (7.5–11.5) | 20 (10–50) | 0.58†|
pStage | Â | ||
 I | 4 (16.0%) | 55 (31.6%) | 0.21 |
 II | 11 (44.0%) | 60 (34.5%) | |
 III | 10 (40.0%) | 59 (33.9%) | |