In multiple logistic regression analysis, the following factors were independent risk factors for the development of SSI (p < 0.01): age, chronic disease, smoking, blood glucose, ASA score, white blood cell count, surgical wound class, Body mass index BM, factors associated with SSI found by univariate analysis (p < 0.01) included Department, gender, the time of surgery, white blood cell count, NNIS risk index, hospital stay of patients with SSI was extended by an average of 9.9 days compared to patients without SSI (5.2 days) (p < 0.01).