Multivariate logistic regression analysis of factors associated with surgical site infection
| Risk factor | OR (95% CI) |
|---|---|
| Male sex | 2.6 (1.02–6.6) |
| Length of operation (86 min v. 181 min [25th v. 75th percentile]) | 2.1 (1.23–3.6) |
| Urgency (emergent v. elective) | 4.7 (1.58–14.4) |
| Approach (open v. laparoscopic) | 6.5 (2.16–19.6) |
| Age | 1.09 (0.57–2.1) |
| Body mass index | 1.20 (0.68–2.1) |
| Smoking | 0.55 (0.15–2.1) |
| Diabetic | 1.52 (0.52–4.5) |
| ASA score | 1.27 (0.75–2.2) |
| Blood transfusion | 0.93 (0.28–3.2 ) |
| Preoperative albumin level | 0.91 (0.63–1.3) |
| Malignant disease | 2.35 (0.65–8.5) |
| Preoperative antibiotic | 2.32 (0.71–7.6) |
| Wound type (contaminated/dirty v. clean-contaminated) | 1.59 (0.48–5.3) |
ASA = American Society of Anesthesiologists; CI = confidence interval; OR = odds ratio.