P196 Major variance in scoring of endoscopic recurrence after ileocolic resection for Crohns Disease – a systematic review and meta-analysis

Van Der Does De Willebois, E.(1)*;Bellato, V.(2);van Dieren, S.(3);Duijvestein, M.(4);Buskens, C.(1);Vignali, A.(2);Bemelman, W.(1);

(1)Amsterdam UMC, Surgery, Amsterdam, The Netherlands;(2)IRCCS San Raffaele, Surgery, Milan, Italy;(3)Amsterdam UMC, Statistics and Epidemiology, Amsterdam, The Netherlands;(4)Radboud UMC, Gastroenterology, Nijmegen, The Netherlands;


Adequate scoring of endoscopic recurrence in Crohn’s disease patients is of utmost importance, as it is used to diagnose recurrent disease, to predict disease outcomes, to (re-)initiate or change therapy and to monitor its effect. This study aims to assess the variance in endoscopic recurrence in patients after ileocolic resection for Crohn's disease using the most common classification systems, the Rutgeerts (RS) and modified Rutgeerts (mRS) classification.


A systematic literature search using MEDLINE, Embase and the Cochrane Library was performed. All RCTs and cohort studies describing endoscopic recurrence after an ileocolic resection for Crohn's disease were included. Main outcome was the range of endoscopic recurrence rates within twelve months postoperatively, defined as RS≥i2 and/or mRS≥i2b. A proportional meta-analysis was performed.


Seventy-six studies comprising 7751 patients were included. The weighted mean of the endoscopic recurrence rates, defined as either RS≥i2 and/or mRS≥i2b, was 43.99% (95 per cent CI 43.56 – 44.43), ranging from 5.0% – 93.0%, fig 1. For studies reporting endoscopic recurrence defined as ≥i2 and for studies reporting recurrence defined as ≥i2b the weighted means were 44.0% (range 5.0% – 93.0%) and 41.1% (range 19.8% – 62.9%) respectively. Within studies reporting both RS and mRS the weighted means for endoscopic recurrence were 61.3% (range 39.1% – 84.7%) and 40.6% (range 19.8% – 62.0%) respectively.


This study demonstrates a major variance in scoring endoscopic recurrence after ileocolic resection for Crohn's disease, with the greatest variance when using the original Rutgeerts classification. This suggests a high likelihood of inadequate diagnosis of disease recurrence, with major implications for quality of life and health care consumption. Therefore, there is an important need to improve endoscopic scoring of recurrent disease.