Table 3.
Multivariate analysis of perioperative (preoperative, intraoperative, and select postoperative) patient risk factors and selected surgical approach associated with superficial incisional SSI.
| Factor | Any superficial incisional SSI, no. (%) | Multivariate analysis |
|
|---|---|---|---|
| OR (95% CI) | P value | ||
| BMI | <.001 | ||
| Underweight, normal, or overweight (n = 572) | 15 (2.6) | Referent | |
| WHO class I or II (n = 496) | 36 (7.3) | 3.0 (1.6–5.7) | |
| WHO class III (n = 204) | 25 (12.3) | 4.7 (2.4–9.4) | |
| Super obese (n = 78) | 13 (16.7) | 5.4 (2.4–12.6) | |
| ASA score | .007 | ||
| 1 or 2 (n = 806) | 33 (4.1) | Referent | |
| 3 or 4 (n = 535) | 56 (10.5) | 2.0 (1.2–3.2) | |
| Smoking status | .02 | ||
| No smoking history (n = 904) | 51 (5.6) | Referent | |
| Former smoker (n = 354) | 27 (7.6) | 1.4 (0.8–2.3) | |
| Current smoker (n = 95) | 11 (11.6) | 2.7 (1.3–5.6) | |
| Minimally invasive surgery | .008 | ||
| No (n = 1173) | 88 (7.5) | 15.0 (2.1–109.7) | |
| Yes (n = 180) | 1 (0.6) | Referent | |
| Intraoperative PRBCT | .04 | ||
| No (n = 1156) | 67 (5.8) | Referent | |
| Yes (n = 190) | 22 (11.6) | 1.8 (1.0–3.0) | |
Abbreviations: ASA, American Society of Anesthesiologists; BMI, body mass index; OR, odds ratio; PRBCT, packed red blood cell transfusion; SSI, surgical site infection; WHO, World Health Organization.