Multicentre study of non‐surgical management of diverticulitis with abscess formation. BJS 2019; 106: 458-466.

Results

Overall, 447 patients from ten hospitals were included (Hinchey Ib 215; Hinchey II 232), with a median follow‐up of 72 (i.q.r. 55–93) months. Most patients were treated without PCD (332 of 447, 74·3 per cent). Univariable analyses, stratified by Hinchey grade, showed no differences between no PCD and PCD in short‐term treatment failure (Hinchey I: 22·3 versus 33 per cent, P = 0·359; Hinchey II: 25·9 versus 36 per cent, P = 0·149) or emergency surgery (Hinchey I: 5·1 versus 6 per cent, P = 0·693; Hinchey II: 10·4 versus 15 per cent, P = 0·117), but significantly more complications were found in patients with Hinchey II disease undergoing PCD (12 versus 3·7 per cent; P = 0·032). Multivariable analyses showed that treatment strategy (PCD versus no PCD) was not independently associated with short‐term treatment failure (odds ratio (OR) 1·47, 95 per cent c.i. 0·81 to 2·68), emergency surgery (OR 1·29, 0·56 to 2·99) or long‐term surgery (hazard ratio 1·08, 95 per cent c.i. 0·69 to 1·69). Abscesses of at least 3 cm in diameter were associated with short‐term treatment failure (OR 2·05, 1·09 to 3·86), and abscesses of 5 cm or larger with the need for surgery during short‐term follow‐up (OR 2·96, 1·03 to 8·13).