Table 3 Descriptive data and bivariate analyses of surgical risk factors associated with SSI
Total (%) (n = 294) | N (%) With SSI (n = 34) | N (%) Without SSI (n = 260) | OR (95% CI) | p-value | |
|---|---|---|---|---|---|
ASA score | |||||
ASA I | 211 (71.8) | 15 (7.1) | 196 (92.9) | Reference | |
ASA II-IV | 83 (28.2) | 19 (22.9) | 64 (77.1) | 3.9 (1.9–8.1) | < 0.001 |
Wound class | |||||
Clean and clean-contaminated | 286 (97.3) | 30 (10.5) | 256 (89.5) | Reference | |
Contaminated and dirty | 8 (2.7) | 4 (50) | 4 (50) | 8.5 (2–35.9) | 0.001 |
Grade of surgeon | |||||
Surgeon | 211 (71.8) | 19 (9) | 192 (91) | Reference | |
Resident | 83 (28.2) | 15 (18.1) | 68 (88.9) | 2.2 (1.1–4.6) | 0.029 |
Time of prophylaxis | |||||
≤ 15 min | 41 (13.9) | 4 (9.8) | 37 (90.2) | NA | 0.653 |
15–30 min | 248 (84.4) | 30 (12.1) | 218 (87.9) | ||
30 min-1 h | 5 (1.7) | 0 (0) | 5 (100) | ||
Duration of surgery (hours) | |||||
< 2 | 181 (61.6) | 15 (8.3) | 166 (91.7) | Reference | |
≥ 2 | 113 (38.4) | 19 (16.8) | 94 (83.2) | 2.2 (1.1–4.6) | 0.026 |
Transfusion | |||||
No | 266 (90.5) | 23 (8.6) | 243 (91.4) | ||
Yes | 28 (9.5) | 11 (39.3) | 17 (60.7) | 6.8 (2.9–16.3) | < 0.001 |
Number of staff in the room | |||||
≤ 6 | 150 (51) | 18 (12) | 132 (88) | NA | |
> 6 | 144 (49) | 16 (11.1) | 128 (88.9) | NA | 0.812 |
Hospital stay post-operatively (days) | |||||
≤ 14 | 246 (84) | 7 (2.8) | 239 (97.2) | Reference | |
> 14 | 47 (16) | 26 (55.3) | 21 (44.7) | 42.3 (16.4–108.9) | < 0.001 |