Table 5.
Univariate risk estimates of acquiring a surgical-site infection
| Risk factor | Unadjusted odds ratio | 95% confidence interval | P | |
|---|---|---|---|---|
|
Arm |
A |
Reference |
- |
|
| |
B |
0.72 |
0.27,1.90 |
0.504 |
|
Gender |
Male |
Reference |
- |
|
| |
Female |
0.40 |
0.13,1.18 |
0.097 |
|
Center |
European Institute of Oncology |
Reference |
- |
|
| |
San Gerardo Monza |
0.57 |
0.19,1.70 |
0.313 |
|
Smoking status |
Never |
Reference |
- |
|
| |
Previous |
1.42 |
0.50,4.09 |
0.598 |
| |
Smoker |
1.14 |
0.27,4.80 |
0.951 |
|
Diagnosis |
Colon |
Reference |
|
|
| |
Rectal |
2.68 |
1.00,7.21 |
0.051 |
|
Preoperative treatment |
None |
Reference |
- |
|
| |
CT+RT |
2.05 |
0.57,7.35 |
0.271 |
|
ASA |
I |
Reference |
- |
|
| |
II |
1.27 |
0.14,11.3 |
0.998 |
| |
III |
1.60 |
0.15,17.4 |
0.658 |
|
Agea |
|
1.02 |
0.96,1.08 |
0.564 |
|
Body mass indexa |
|
1.08 |
0.97,1.21 |
0.155 |
| Wound lengtha | 0.96 | 0.88,1.05 | 0.389 | |
aOdds-ratio estimated by unit increase. A: standard dressing; B: Aquacel Ag Hydrofiber dressing; CT+RT: preoperative chemoradiation therapy.