Fig. 1.

Decision tree: The overall risk of developing an anastomotic leak is 5.3% in our population. The subgroup of patients after left-sided resection had an increased risk of 9%. The patients who had a relative decrease in DBP of more than 40% during the operation had an increased risk of 14%, and their risk further increased to 22% if intraoperative blood loss was ≥250 mL. Patients in this subgroup who had a preoperative DBP of ≥90 mmHg had a 33% increased risk of developing an anastomotic leak