“…The difference in antibiotic performance was significant after general abdominal–gastrointestinal operations (including studies that looked at a range of abdominal surgery, and colorectal surgery but not for upper gastrointestinal or biliary surgery [6–9, 13, 15, 20, 23, 24, 30, 36, 43, 46, 51, 55, 57, 62, 77] and pelvic surgery. The differences were most significant after colorectal surgery ( n = 6; OR 0.3; 95% CI 0.16–0.58; p < 0.001) and obstetric and gynecological (O&G) surgery ( n = 9; OR 0.53; 95% CI 0.34–0.69) [17, 39, 47, 63, 68, 71, 73, 75, 79]. There was no difference in antibiotic performance for clean operations, which included mainly cardiac surgery and orthopedic operations [27, 37, 48, 65, 69].…”