Table 3.
Univariate Analysis of Candidate Predictors for Superficial Incisional Surgical Site Infections
| Variable | No Superficial Incisional SSI (n = 605) | Superficial Incisional SSI (n = 50) | p Value |
|---|---|---|---|
| Normalized subcutaneous fat, mean ± SD | 13.7 ± 6.0 | 15.8 ± 6.4 | 0.020 |
| BMI, kg/m2, mean ± SD | 27.6 ± 6.7 | 27.9 ± 5.9 | 0.73 |
| Total psoas area, mm2, mean ± SD | 2064.0 ± 791.4 | 1964.4 ± 823.2 | 0.39 |
| Age, y, mean ± SD | 59.3 ± 15.4 | 58.5 ± 16.5 | 0.73 |
| Women, n (%) | 278 (46.0) | 28 (56.0) | 0.19 |
| Diabetes, n (%) | 108 (17.9) | 11 (22.0) | 0.45 |
| Dyspnea, n (%) | 69 (11.4) | 6 (12.0) | 0.82 |
| Steroid use, n (%) | 50 (8.3) | 7 (14.0) | 0.19 |
| Alcoholism, n (%) | 8 (1.3) | 0 (0.0) | >0.99 |
| Smoker, n (%) | 88 (14.5) | 15 (30.0) | 0.008 |
| Radiotherapy within past 90 d, n (%) | 22 (3.6) | 3 (6.0) | 0.43 |
| ASA class, n (%) | 0.11 | ||
| I | 11 (18) | 0 (0.0) | |
| II | 194 (32.1) | 25 (50.0) | |
| III | 315 (52.1) | 21 (42.0) | |
| IV | 80 (13.2) | 4 (8.0) | |
| V | 5 (0.83) | 0 (0.0) | |
| Procedure type, n (%) | 0.39 | ||
| Colectomy | 145 (24.0) | 15 (30.0) | |
| All other procedures | 460 (76.0) | 35 (70.0) | |
| Wound classification, n (%) | 0.009 | ||
| Clean | 116 (19.3) | 2 (4.0) | |
| Clean/contaminated | 367 (61.0) | 42 (84.0) | |
| Contaminated | 67 (11.1) | 4 (8.0) | |
| Dirty/infected | 52 (8.6) | 2 (4.0) | |
| Operative time, hrs, mean ± SD | 3.7 ± 2.3 | 4.5 ± 2.0 | 0.014 |
| Work RVU, mean ± SD | 28.5 ± 12.4 | 30.1 ± 12.1 | 0.38 |