Affiliation:
1. Division of Colon and Rectal Surgery Department of Surgery Asan Medical Center University of Ulsan College of Medicine Seoul Korea
2. Department of Clinical Epidemiology and Biostatistics Asan Medical Center University of Ulsan College of Medicine Seoul Korea
Abstract
AbstractBackgroundProphylactic antibiotics (PAs) are standard for preventing surgical site infections (SSIs) post‐colorectal surgery. This study aims to compare the effect of additional empiric oral antibiotics (OAs) alongside routine PAs to identify SSI risk factors.MethodsA retrospective observatory analysis was conducted from January 2019 to December 2022 at Asan Medical Center, Seoul, Korea. The cohort was divided into two groups: PA given 1 h before surgery and discontinued within 24 h, and OA administered empiric OAs during mechanical bowel preparation in addition to PA.ResultsFrom a total of 6736 patients, 3482 were in the PA group and 3254 in the OA group. SSI incidence showed no significant intergroup difference (p = 0.374) even after propensity score matching (p = 0.338). The multivariable analysis revealed male sex [odds ratio (OR): 2.153, 95% confidence interval (CI): 1.626–2.852, and p = 0.001], open surgery (OR: 3.335, 95% CI: 2.456–4.528, and p = 0.001), dirty wound (OR: 2.171, 95% CI: 1.256–3.754, and p = 0.006), and an operation time of more than 145 min (OR: 2.110, 95% CI: 1.324–3.365, and p = 0.002) as SSI risk factors. In rectal surgery subgroup, OA demonstrated a protective effect against SSI (OR: 0.613, 95% CI: 0.408–0.922, and p = 0.019) and in laparoscopic approach (OR: 0.626, 95% CI: 0.412–0.952, and p = 0.028).ConclusionsOA did not affect SSI incidence in colorectal surgeries. Male sex, open surgery, dirty wounds, and longer operation time were risk factors for SSI. However, for rectal and laparoscopic surgery, OA was a protective factor for SSI.