In the univariate analysis, eight risk factors for a positive swab were identified: older age (46 vs. 31 years, p < 0.001), higher BMI (24.8 vs. 24.1 kg/m2, p = 0.018), worse ASA score (p < 0.001), higher prevalence of diabetes (16 vs. 3%, p = 0.004), higher preoperative CRP value (92 vs. 33 mg/l, p < 0.001), higher intraoperative prevalence of perforation (49 vs. 13%, p < 0.001), of necrosis or gangrene (15 vs. 6%, p = 0.001), and of perityphlitic abscess (25 vs. 5%, p < 0.001) (Table 4). This evidence concerns the gene CRP and diabetes mellitus.