Table 4. Subdistributional Fine-Gray Hazard Modela.
| Variable | HR (95% CI) | P value |
|---|---|---|
| Treatment group | ||
| No irrigation vs polyhexanide | 1.39 (0.63-3.08) | .41 |
| Saline vs polyhexanide | 1.31 (0.71-2.43) | .39 |
| Level of contamination | ||
| III or IV vs I or II | 0.63 (0.17-2.36) | .50 |
| BMIb | ||
| 18.5-<25 | 2.04 (0.28-15.19) | .49 |
| 25-<30 | 1.58 (0.20-12.22) | .66 |
| ≥30 | 1.06 (0.13-8.89) | .96 |
| Colorectal surgery | ||
| Yes vs no | 2.59 (1.39-4.84) | .003 |
Abbreviations: BMI, body mass index (calculated as weight in kilograms divided by height in meters squared); HR, hazard ratio.
a
Incisional surgical site infection was the main event; organ or space surgical site infection, relaparotomy, and death were competing risks; and treatment group, BMI class, and colorectal surgery were covariates.
b
Compared to BMI <18.5.