Evaluation of independent risk factors associated with surgical site infections from caesarean section

BACKGROUND: The present study assessed factors associated with the risk of surgical site infections (SSI) after a caesarean section (C-section). METHODS: Data were collected in 1682 women undergoing elective (53.9%) and emergency (46.1%) C-sections between 1st August 2020, and 30th December 2021, at a National Health Service hospital (Surrey, UK). RESULTS: At the time of C-section, the mean age was 33.1 yr (SD ± 5.2). Compared to women with BMI < 30 kg/m(2), those with a BMI ≥ 35 kg/m(2) had a greater risk of SSI, OR 4.07 (95%CI 2.48–6.69). Women with a history of smoking had a greater risk of SSI than those who had never smoked, OR 1.69 (95%CI 1.05–2.27). Women with a BMI ≥ 30 kg/m(2) and had a smoking history or emergency C-section had 3- to tenfold increases for these adverse outcomes. Ethnic minority, diabetes or previous C-section did not associate with any of the outcomes. CONCLUSIONS: High BMI, smoking, and emergency C-section are independent risk factors for SSI from C-section. Women planning conception should avoid excess body weight and smoking. Women with diabetes and from ethnic minority backgrounds did not have increased risks of SSI, indicating a consistent standard of care for all patients.