Table 3.
Univariate statistical analysis of risk factors for surgical site infection (SSI) among 231 patients operated during the study period
| Variable | Patients characteristics | With SSI (n = 15) |
Without SSI (n = 216) |
Relative risk (95% CI) or p-value | |
|---|---|---|---|---|---|
| Situation | Total n (%) | ||||
| Chronic Hepatopathy | Present | 4 (1.7%) | 1 (6.6%) | 3 (1.3%) | 4.05 (0.68–23.80) |
| Absent | 227 (98.3%) | ||||
| Malignance | Present | 15 (6.5%) | 1 (6.6%) | 14 (6.4%) | 1.02 (0.14–7.30) |
| Absent | 216 (93.5%) | ||||
| Diabetes Mellitus | Present | 59 (25.5%) | 2 (13.3%) | 57 (26.3%) | 0.44 (0.10–1.92) |
| Absent | 172 (74.4%) | ||||
| Use of immunosuppressive drugs | Present | 7 (3%) | 1 (6.6%) | 6 (2.7%) | 2.28 (0.34–15.04) |
| Absent | 224 (97%) | ||||
| Smoking | Present | 53 (22.9%) | 5 (33.3%) | 48 (22.2% | 1.67 (0.60–4.69) |
| Absent | 178 (77.1%) | ||||
| Urgent surgery | Present | 16 (6.9%) | 1 (6.6%) | 15 (6.9%) | 0.95 (0.13–6.84) |
| Absent | 215 (93,1%) | ||||
| Technical complications during surgery | Present | 8 (3.4%) | 1 (6.6%) | 7 (3.3%) | 1.99 (0.29–13.34) |
| Absent | 223 (96.6%) | ||||
| Alcohol-based surgical hand preparation | Present | 99 (42.8%) | 4 (26.6%) | 95 (43.9%) | 0.48 (0.16–1.48) |
| Absent | 132 (57.2%) | ||||
| Extracorporeal circulation time (min)a | 130 (65–210) | 117 (80–145) | p = 0.688 | ||
| ASA scorea | 2 (2-2) | 2 (2-2) | P = 0.932 | ||
| Pre-operative length of stay (days)a | 3 (1–7) | 2 (1–6) | p = 0.356 | ||
| Duration of surgery (min)a | 195 (129–285) | 190 (125–261) | p = 0.778 | ||
| Body Mass Index – BMIa | 28.5 (25.3–30.1) | 26.6 (23.6–31.2) | p = 0.802 | ||
aMedian (interquartile range)