Introduction
Dr Sandborn and Prof. Peyrin-Biroulet
The inflammatory bowel diseases (IBD) diagnosed as Crohn’s disease and ulcerative colitis are chronic disabling conditions with an increasing incidence worldwide.1 Although the management of IBD has changed considerably over the past two decades, with the most important trends being the advent of several therapeutic anti-tumor necrosis factor (TNF) antibodies,2 several important questions concerning clinical treatment approaches remain. The first proceedings from a live Clinical Appraisal symposium were published online in Clinical Gastroenterology and Hepatology earlier (http://education.cghjournal.org/video.php?event_id=976&stage_id=5&vcs=1).3 Using the same international survey, leading faculty roundtable, and literature review-and-discussion methodology as was used in that appraisal, this second symposium was convened to address additional questions, including use of anti-TNF therapy during the operative period, thiopurines as monotherapy, whether anti-TNF agents possessed a disease-modifying effect, the safety of combination therapy, the withdrawal of therapy in patients in remission, and the potential place of anti-integrins in IBD therapy (Table 1). The main intention of this meeting was to provide a framework for future discussion and research on IBD.
For this second Clinical Appraisal an 8-member faculty was recruited and asked to draft 8 clinically important statements pertaining to these questions. Each of the 8 participants was then assigned one of the statements and asked to systematically review and summarize the evidence supporting and/or refuting that statement in preparation for presentation during the live symposium.
For each study chosen as relevant for review, the faculty member was ask to pay particular attention to the study’s methodology, the patients enrolled, and the outcomes pertaining to the assigned statement. Then following each presentation of a statement and literature review to the panel, all 8 participants discussed the evidence reviewed for and against the statement and voted anonymously using a 5-point voting scheme to evaluate both (1) the objective strength of the evidence and (2) what they felt their own levels of support for the statements to be (Table 1).
In addition to defining the level of evidence and support for each statement, the faculty also discussed and outlined what additional data they felt were required in order to further define the statement for future clinical use.
To provide further evidence of current clinical perspectives on these issues, a Web-based survey of international practicing gastroenterologists was conducted to determine their level of support for the same 8 clinical statements, using the same 5-point voting scheme to rate the 8 statements (Table 1). An e-mail invitation to participate in the electronic survey was sent to approximately 20,000 gastroenterologists, including 9781 members of the American Gastroenterological Association (AGA). The final response rate was 1.4% (284 surveys completed). The purpose of the survey was to provide a comparison of the responses of an international subset of practicing clinical gastroenterologists with the data-driven responses of the symposium faculty. Several gastroenterology studies have been reported using clinician survey-based data from less than 284 completed responses.4,5
This on-line interactive article represents the proceedings of a faculty of gastroenterologists with focused research interest and extensive clinical experience in IBD whose goal was to assess the quality of evidence surrounding a number of challenging treatment scenario statements with important potential implications for clinical practice.
| Category: Nature of the Evidence* | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Evidence obtained from at least 1 well-designed, randomized, controlled trial | Evidence obtained from well-designed cohort or case-control studies | Evidence obtained from case series, case reports, or flawed clinical trials | Opinions of respected authorities based on clinical experience, descriptive studies, or reports of expert committees | Insufficient evidence to form an opinion | |||||
| Category: Individual Level of Support** | |||||||||
| Agree completely | Agree with minor reservations | Agree with major reservations | Reject with reservations | Reject completely | |||||
| *Faculty panel members **Faculty and International Physicians survey responders |
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Conclusions (click to expand/collapse)
Similarly to the first Clinical Appraisal published in Clinical Gastroenterology and Hepatology (http://education.cghjournal.org/video.php?event_id=976&stage_id=5&vcs=1),3 the goal of this second Appraisal was to critically review the existing medical literature regarding current knowledge on treating IBD. The review was particularly challenging because of a lack of prospective controlled clinical trials addressing certain important questions, for example on the complications or benefits of anti-TNF therapy during the operative period, the use of thiopurines as monotherapy, whether anti-TNF agents possess a disease-modifying effect, the safety of combination therapy, the withdrawal of therapy in patients in remission, and the place of anti-integrins in IBD therapy.
Marked changes in IBD trial design have occurred, resulting in increasingly frequent use (progressing toward systematic incorporation) of endoscopy and biomarkers into outcome measures. This evolution in outcomes assessment will produce a wealth of data in the years ahead that will allow a better understanding of treatment effects and the operating characteristics of endoscopy and biomarkers. In this second Clinical Appraisal, the faculty were somewhat circumspect regarding certain trends and evolutions that have substantially entered clinical practice without definitive supporting scientific evidence, recognizing that many unanswered questions remain – eg, use of fecal calprotectin, histology, and, to some degree, therapeutic drug monitoring. Although the faculty thought that many of the statements discussed here will likely turn out to be true in the coming years, it is also likely that some modifications will need to be made and nuances added.
References
Nielsen OH, Ainsworth MA. Tumor necrosis factor inhibitors for inflammatory bowel disease. N Engl J Med. 2013;369:754-762.
Park SC, Jeen YT. Current and emerging biologics for ulcerative colitis. Gut Liver 2015;9:18-27.
D’Haens G, Bressler B, Danese S, et al. The Crohn's Disease–Ulcerative Colitis clinical Appraisal. Clin Gastroenterol Hepatol 2016;14. Available at http://education.cghjournal.org/video.php?event_id=976&stage_id=5&vcs=1; referenced at Clin Gastroenterol Hepatol 2016;14:638-639.
Saibeni S, Kohn A, Meucci G, et al. How thiopurines are used for the treatment of inflammatory bowel diseases: an Italian survey. Dig Liver Dis. 2015;47:170-173.
Klag T, Stange EF, Wehkamp J. Management of Crohn's disease - are guidelines transferred to clinical practice? United European Gastroenterol J. 2015;3:371-380.
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