An association was found in univariable analyses with pneumonia (P = 0.031), overall complications (P = 0.003) and wound infection (P = 0.048)36 and not with graded complications,26 ileus, UTI, CD1, CD2, CD3, CD4,36 overall CD3–5,39 surgical‐related complications CD3–543 and early postoperative small bowel obstruction (EPSBO).49 This evidence concerns the gene CD2 and ileus.