This document summarizes a systematic review that analyzed the incidence of postoperative anastomotic leaks following colorectal resection surgery. The review identified articles published between 2003 and 2015 reporting on postoperative leaks in the Medline and Embase databases. The studies extracted data on the rate of postoperative leaks as well as patient and surgical characteristics associated with leaks. The review aims to assess the incidence of postoperative leaks and identify patient factors that contribute to the development of leaks following colorectal resection surgery.