Table 5.
Association between surgical site infections and investigated factors, according to univariate logistic regression analysis*
| No. (%) of patients |
||||
|---|---|---|---|---|
| Variable | without SSI (n = 214) | with SSI (n = 63) | OR (95% CI) | P |
| Age (years, mean) | 50.6 | 53.1 | 1.01 (0.99-1.02) | 0.392 |
| Sex (male) | 100 (46.7) | 21 (33.3) | 1.75 (0.97-3.16) | 0.061 |
| Obesity (BMI≥25) | 72 (33.6) | 23 (36.5) | 1.13 (0.63-2.04) | 0.674 |
| Smoking | 80 (37.4) | 28 (44.4) | 1.34 (0.76-2.37) | 0.313 |
| Diabetes mellitus | 15 (7.0) | 10 (15.9) | 2.50 (1.06-5.89) | 0.036 |
| Emergency procedures | 31 (14.5) | 13 (20.6) | 1.54 (0.75-3.15) | 0.243 |
| Open reduction fracture | 26 (12.1) | 17 (27.0) | 2.67 (1.34-5.33) | 0.005 |
| Preoperative bath or shower | 91 (42.5) | 9 (14.3) | 0.47 (0.29-0.76) | 0.002 |
| Preoperative shaving with razor | 39 (18.2) | 21 (33.3) | 2.24 (1.20-4.21) | 0.012 |
| Hours between shaving and operation (mean±SD) | 12.9 ± 14.5 | 19.1 ± 21.1 | 1.02 (1.002-1.04) | 0.033 |
| No. of persons in the operating room (mean±SD) | 6.0 ± 1.5 | 6.6 ± 1.5 | 1.29 (1.07-1.57) | 0.009 |
| Presence of drain tube | 114 (53.3) | 35 (55.6) | 1.09 (0.62-1.93) | 0.749 |
| Drainage duration (days, mean±SD) | 2.9 ± 1.6 | 4.1 ± 3.4 | 1.24 (1.05-1.47) | 0.010 |
| Contaminated wound and dirty/infected wound | 16 (7.5) | 33 (52.4) | 13.61 (6.69-27.68) | <0.001 |
| ASA score >2 | 22 (10.3) | 20 (31.7) | 4.06 (2.04-8.09) | <0.001 |
| Duration of surgery ≥75th percentiles | 44 (20.6) | 15 (23.8) | 1.21 (0.62-2.35) | 0.580 |
*Abbreviations: SSI – surgical site infections; ASA – American Society of Anesthesiologists; OR – odds ratio; CI – confidence interval.