ECCO Guidelines on Therapeutics in Crohn's Disease: Medical Treatment

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Abstract

Crohn’s disease [CD] is a chronic inflammatory bowel disease [IBD] that can result in progressive bowel damage and disability.1 CD can affect individuals of any age, from children to the elderly,2,3 and may cause significant morbidity and impact on quality of life. Up to one-third of patients present with complicated behaviour [strictures, fistula, or abscesses] at diagnosis.4 Most patients over time will develop a complication, with roughly 50% of patients requiring surgery within 10 years of diagnosis.5–7 As the precise aetiology of CD remains unknown, a curative therapy is not yet available.8 Several agents are available for the medical treatment of CD. Medical agents include mesalazine [5-ASA], locally active steroids [such as budesonide], systemic steroids, thiopurines such as azathioprine [AZA] and mercaptopurine [MP], methotrexate [MTX], and biologic therapies (such as anti-tumour necrosis factor [TNF], anti-integrins, and anti-interleukin [IL] 12/23]. The European Crohn’s and Colitis Organisation [ECCO] produces and regularly updates several guidelines aimed at providing evidence-based guidance on critical aspects of IBD care to all health care professionals who manage patients with IBD. To provide high-quality evidence-based recommendations on medical treatment in CD, ECCO decided to develop these guidelines by adopting the GRADE [Grading of Recommendations Assessment, Development, and Evaluation] approach.9 GRADE is a systematic process for developing guidelines which addresses how to frame the health care questions, summarise the evidence, formulate the recommendations, and grade their strength and the quality of the associated evidence. GRADE increases transparency at all levels of this process and makes explicit the three considerations that lead to a particular recommendation: the quality of the evidence, the balance of benefits and harms, and the patients’ values and preferences. Therefore ECCO reviewed the available high-quality evidence on the medical management of CD and developed evidence-based recommendations on the medical treatment of adult patients with CD. These guidelines do not cover specific situations, such as postoperative management of adult patients with CD, which was already covered in the latest ECCO Guidelines on Crohn’s disease.10 Based on the GRADE workflow, the Guidelines Committee of ECCO [GuiCom] selected a panel of 48 experts supported by a team of methodologists and librarians. Selection was based on IBD expertise, scientific background, and knowledge of the GRADE methodology. All panellists received adequate training in GRADE before starting the process. Additionally, four patients with CD representing the European Federation of Crohn’s and Colitis Associations [EFCCA] were invited to participate in all face-to-face meetings and to provide their experiences and state their preferences. Three domains for medical treatment of CD were identified: 1] induction therapy; 2] maintenance therapy; 3] therapy of fistulising perianal disease. All panellists were assigned to one of three working groups coordinated by one to two working group leaders under the supervision of two Guideline coordinators. The panellists first formulated a series of specific questions using the PICO format [Population, Intervention, Comparator, Outcomes] which were deemed to be clinically important for the medical treatment of CD. The outcomes of all PICO questions were subsequently graded as ‘not important’, ‘important’, or ‘critical’ during a face-to-face kick-off meeting in Vienna, using a Delphi consensus process. A team of professional librarians performed a comprehensive literature search on EMBASE, PubMed/Medline, and Cochrane Central databases using specific search strings for each PICO question [Supplementary Files 1, 2, and 3, available as Supplementary data at ECCO-JCC online]. Two independent working group members [one assigned to the PICO and another one from the same group as a second reviewer] assessed the relevance of each abstract to PICO and included or excluded all the relevant papers for the final data extraction and analysis. Subsequently, the working group members assigned to each PICO question systematically reviewed and summarised the evidence on every outcome, to compile a Summary of Findings [SoF] table for each question. The GRADE method follows a hierarchical approach to synthesise evidence; recent high-quality systematic reviews and meta-analyses of clinical trials were preferentially used to create the recommendations. When these were not available, individual randomised clinical trials [RCTs] followed by observational studies were reviewed; results of individual studies were pooled using random-effects meta-analysis as appropriate and when needed. To define disease activity and severity [mild-to-moderate and moderate-to-severe], we accepted the definitions used by the investigators of the studies selected as an evidence basis for our work. The quality of evidence was classified into the following four categories in accordance with the GRADE approach: ‘high’ [meaning that further research is unlikely to change our in the research may change our in the research to change our in the and [meaning that any of is each PICO the quality of evidence was to the quality of evidence outcomes graded as The strength of each was graded as [meaning the of an the or or as [meaning the balance is the quality of evidence, values or and the outcomes were not in the clinical this was in the To the recommendations, we from the systematic reviews or our group of methodologists performed the All recommendations were to by the panel the ECCO for each with and from a of ECCO members who to the were not selected to be of the The final of all was panel members during a final consensus meeting in and to a final recommendations were at of the panellists with the and associated strength The of the and and the of the were reviewed by two Guideline Committee members and by the ECCO who the final of these The literature search the relevant definitions of and a of the and the the evidence can be in the Supplementary available as Supplementary data at ECCO-JCC As CD is a therapy to in the and in the The that chronic and results in to a recent in medical treatment and disease is that and may patients to their and therapy are to high-quality evidence is not available to this affect the of medical These include disease disease activity and to and of perianal or fistulising the individual for and the individual and the and of each be As is a clinical and is of to disease and therapy at based on and approach will provide the with the to therapy the of of the disease and which is to be to disease to the management of CD a series of health care maintenance be to be and be and appropriate guidance or for and be as in ECCO or the of for induction of of Crohn’s disease performed a meta-analysis of that the of or with in patients with active CD [Supplementary 1, available as Supplementary data at ECCO-JCC online]. The of from to patients with disease with or disease were was significant for induction of clinical [Supplementary 1, available as Supplementary data at ECCO-JCC online]. A recent Cochrane significant and to be in our as was significant in to when with [Supplementary 2, available as Supplementary data at ECCO-JCC online]. the trials of was over for clinical [Supplementary 3, available as Supplementary data at ECCO-JCC online]. significant in to was in trials that [Supplementary available as Supplementary data at ECCO-JCC online]. meta-analysis a significant on clinical the that at of another meta-analysis was to any such A pooled of three trials of a of a in the Crohn’s with the in and was not clinically Two trials with for induction of clinical A pooled a of [Supplementary available as Supplementary data at ECCO-JCC online]. was not by any significant in for [Supplementary available as Supplementary data at ECCO-JCC online]. in trials that the of was to patients with The of or for the treatment of CD not in using for the induction of clinical in patients with active Crohn’s disease to the A Cochrane systematic and included three that at a of with [Supplementary 2, available as Supplementary data at ECCO-JCC online]. Two of these clinical as in or at at was in all three was to for clinical and clinical in patients with active CD in the to the As with steroids which are associated with systemic activity and systemic and and a was to be in the reviewed A Cochrane systematic and meta-analysis from reviewed two that at a of with mesalazine to a mesalazine in patients with active CD [Supplementary 3, available as Supplementary data at ECCO-JCC online]. All trials clinical in or and clinical at was not to mesalazine for clinical in patients with active CD in the [Supplementary available as Supplementary data at ECCO-JCC online]. clinical was in patients in patients mesalazine [Supplementary available as Supplementary data at ECCO-JCC online]. The of was with and in groups [Supplementary and available as Supplementary data at ECCO-JCC online]. studies the of treatment on CD. and to clinical or with the of these the European on the of to or Therefore a was not on to CD, for the treatment of patients with Crohn’s we the of systemic for the induction of clinical and Two on the of systemic or with for the treatment of active available as Supplementary data at ECCO-JCC online]. was at a of 48 and on a basis to and of from to with a of is at over an from these studies in a Cochrane systematic patients on induction of clinical was in patients as with were to be as in clinical in the two studies patients on the of patients from the of systemic was available from one patients with The of was in patients with included of and in patients with and in was for the outcomes to which a quality of evidence the of thiopurines as for the induction of of Crohn’s disease Several studies on the of thiopurines with for induction of and in [Supplementary available as Supplementary data at ECCO-JCC online]. trials the of thiopurines for induction of clinical in with or patients were The active was in four of these and the active was in the The trials were in of of active and of for of the trials for the of The pooled was performed on an basis and for induction of thiopurines and in the active with in the group Three trials on clinical not with of disease these of of disease were of the patients as with of clinical The of clinical was was and to data and the quality of evidence was for this [Supplementary available as Supplementary data at ECCO-JCC online]. one on during The pooled of any was not and thiopurines were in two of of developed The quality of evidence was deemed to a of and on a quality of The groups was at for and for of the trials on at the of the induction data were available that for a pooled trials in of such as or in thiopurines as with a of at and at and for the thiopurines and a of in the group and a significant in in and one relevant was this patients with active CD were randomised to of or for with a of at that was over a [Supplementary available as Supplementary data at ECCO-JCC online]. a of patients with were in clinical The of treatment for and was in with this is by and such as the of studies were that for the induction of of CD. was in the the of for CD and the decided to Three and studies the of and thiopurines for induction of in [Supplementary available as Supplementary data at ECCO-JCC online]. These studies used and of Two studies used at of and and one used at All patients were and received systemic steroids at of the individual studies or the pooled a significant in the to [Supplementary available as Supplementary data at ECCO-JCC online]. the of is with the data are and the quality of evidence is for can be Based on the evidence, on a for the of for clinical in patients with CD not be may be as an for patients with disease when be The to therapy in patients a be the of and to in patients with Crohn’s disease who not to therapy are and therapies for the treatment of CD include and is not in the European for CD, is available in and is a at a of at 2, and during induction and every is a at a of and followed by every is a at a of at 2, and followed by every on agents and from several meta-analyses of their for induction of clinical and clinical [Supplementary available as Supplementary data at ECCO-JCC in patients who not adequate or were to data were available for the induction two studies a the evidence was to on clinical were and data on were by to the of patients included in the meta-analysis on outcomes and and and quality of are was in of The of on and in a that with and were to for induction of The of of biologic agents is a of that patients with fistulising perianal complicated from the of to a of or of agents be the first in disease these results are based on from clinical the of and thiopurines over to clinical and one the of therapy of with as with for the induction of clinical in patients to therapies [Supplementary available as Supplementary data at ECCO-JCC online]. this therapy was not to for clinical therapy was associated with at this was at the of was in to associated with therapy the of used in this was the used in CD patients of therapy with a when starting to in patients with Crohn’s who an to therapy The and Crohn’s the of with over in patients to who to to steroids or [Supplementary available as Supplementary data at ECCO-JCC online]. therapy in of clinical at as with therapy was to result in at this was in for were of in therapy A in clinical is patients who or an to thiopurines and in therapy is in such maintenance in with the benefits in of A of of the of therapy starting therapy in this be in the of evidence, an approach be for induction of in patients with Crohn’s disease with to therapy to therapy high-quality is an that to the by the and CD, induction be using a of systematic and meta-analysis pooled the results from in which was with for induction of in patients with active available as Supplementary data at ECCO-JCC online]. patients with or induction of clinical and induction of clinical at were and a meta-analysis was an of clinical of [Supplementary available as Supplementary data at ECCO-JCC online]. The quality of evidence was The of clinical was [Supplementary available as Supplementary data at ECCO-JCC online]. The quality of evidence was CD patients that of patients at as with of The quality of evidence was on or The pooled of any was not and [Supplementary available as Supplementary data at ECCO-JCC online]. the pooled of any was not and [Supplementary available as Supplementary data at ECCO-JCC the quality of evidence was The of to be for induction of and in patients with Crohn’s disease with to therapy to therapy is a that by the in is at a of at 2, and for and every who do not at can from an at Three randomised trials patients with or on induction of clinical induction of clinical and in adult patients with active available as Supplementary data at ECCO-JCC online]. in these studies were followed for to 10 was in patients with [Supplementary available as Supplementary data at ECCO-JCC online]. clinical was in patients with [Supplementary available as Supplementary data at ECCO-JCC online]. The quality of evidence for these outcomes was of with were not with [Supplementary available as Supplementary data at ECCO-JCC online]. The quality of evidence for this was to from the of or for the treatment of active Crohn’s disease in patients who therapy systematic and meta-analysis performed an of and for induction of in patients with active CD who were or to a of patients with or on induction of clinical and clinical [Supplementary available as Supplementary data at ECCO-JCC online]. The pooled of clinical and clinical were not and the quality of evidence was for a of patients with or on or The pooled of any was not and the pooled of any was not and the quality of evidence was surgery be as an in is for the induction of in patients with CD, as a and of at or a or a Crohn’s of with and is a knowledge on how to CD in of the the and or in patients with disease. Therefore the is to the who the individual and of systemic steroids are in in CD, are by important Additionally, of not disease Therefore we that the of or to steroids the of 10 or within of starting steroids, a within of steroids, or the for a of in all a are not in thiopurines a of and are for in CD patients are with steroids at the of patients with a of steroids and in at and is associated with a of this may be medical and surgery are not or are associated with individual patients with CD as a or with or to therapy we the of These include agents [such as and or All these agents are in and CD The on and and the induction of in the of with thiopurines is for of therapy over was in the performed to The the of or the of and over or in with this be and in The for the of Crohn’s that the of with in patients at of as with a was associated with of and for surgery in patients with A that is associated with to clinical the and of therapy to be a in in the therapy not to be associated with at in the a that therapy is associated with for and as with Therefore the is to the who and to be as specific such as the at for or and at for specific such as patients who or are is evidence on the and in patients with or as a first assessed the and of these agents when used in therapy as with to be in the in was in patients with in patients with CD with disease or to at one surgery be as an the of a for induction of and for using of clinical the or of therapy not on on the disease severity impact of disease in the individual the and for the inflammatory of and disease appropriate studies that the of over a on the of and and that for disease be studies were by this as important research the of for maintenance of in patients with Crohn’s disease for the maintenance of of CD [Supplementary available as Supplementary data at ECCO-JCC online]. significant [Supplementary available as Supplementary data at ECCO-JCC online]. trials that assessed and were from to with trials a of were significant in the of patients an or to or The data were and this [Supplementary available as Supplementary data at ECCO-JCC online]. are for the maintenance of in patients with Crohn’s disease The of maintenance treatment with or to patients with CD who are in one [Supplementary available as Supplementary data at ECCO-JCC online]. meta-analysis included data from trials and A of patients with to were included and followed for to was to in disease activity in was to for the maintenance of in patients outcomes were in four trials and a of patients followed for to The of during maintenance treatment with thiopurines was with The of in patients with thiopurines was and were the the of therapy in patients with Crohn’s disease for that the of thiopurines disease Two studies the of of the for of Crohn’s disease in and the trials [Supplementary available as Supplementary data at ECCO-JCC online]. The excluded from our table was not or the adult patients with a recent of CD were randomised to or to were to active disease in this The results were not significant for any of the critical outcomes of clinical not the two groups patients with and were in The of as and were in patients in the group and in the group methotrexate for the maintenance of in patients with Crohn’s disease on the of are from one patients were of or of for [Supplementary available as Supplementary data at ECCO-JCC online]. with active CD, who to of treatment with were assigned to at a of or for for CD were the of patients who in was in the group in the group 50% of the patients in the group by the of the were in in the group as with the group over the observational [one and the a and patients in the group in the of the was one treatment of these of severity to treatment or from the The of was in patients with Crohn’s disease who with maintenance treatment using the same treatment is Two systematic reviews the of maintenance treatment with and to patients with CD who disease with the same [Supplementary available as Supplementary data at ECCO-JCC online]. trials and were pooled in the meta-analysis from one was on two on and two on A of patients were included and followed for to of the studies included and one included all was as a The of with was The following values were with with and with A significant the three are pooled data available on of all as a performed in the of a Cochrane the for for and were and with is as with for the maintenance of in CD the and of do not the of that may in and observational for clinical in patients with Crohn’s disease who with at every was to in clinical in patients with CD who with [Supplementary available as Supplementary data at ECCO-JCC online]. patients every and patients every were in clinical as with patients and was at clinical and a of with data are to the the of to clinical in patients with Crohn’s disease who with outcomes for the maintenance of with in CD patients [Supplementary available as Supplementary data at ECCO-JCC to in the induction were to every or or a of the patients were in clinical as with of A that at clinical was by of patients every and by of patients every as with in the The treatment every and was and was treatment every and Therefore was every or was in of patients of patients The pooled of any was not patients who were and are data on as this was assessed in a of patients at was significant in patients in the group as with patients in the treatment were during the of were and with significant in the and was an of in the maintenance groups patients in and data are to the are randomised trials or with agents for the maintenance of clinical in patients with CD who or with the same A included trials used the to define clinical with The a time of All were the the the quality of evidence was specific was the in the maintenance Based on is evidence to to or in patients who to induction treatment with any or is a to that and to trials that for the of who from a biologic over the Crohn’s disease patients in clinical under is evidence to for or the of to clinical outcomes as to care from two with a of patients with CD were used to this [Supplementary available as Supplementary data at ECCO-JCC online]. These two of over clinically based for any of our critical clinical [one clinical [one [one [one or [one the a of IBD patients with to maintenance therapy were randomised to or groups were or to a and of the that in patients in clinical a or was in and of in clinical or at were and based the group who received during the patients with CD, with an induction therapy with and were randomised to the following three based on clinical and levels of with of or of or based on clinical The was to a was in clinical with from to in the three in in in studies important in their which the strength of our The outcomes in studies were clinical important such as and to be The in Crohn’s that is on and and that during the induction may outcomes and treatment the that with adequate of patients are Crohn’s disease patients who to an is evidence to for or the of to clinical outcomes to the of in patients on therapy with active to the of of and to clinical was with on clinical in one in a of patients with CD with were randomised to every or based on and levels using the was in clinical the group and the group [Supplementary available as Supplementary data at ECCO-JCC online]. studies a adequate and clinical outcomes from clinical to Based on these observational recent clinical guidelines and a group of experts supported the of the quality of evidence from observational a of patients with active IBD with who and clinical were for and at a of was in of patients in the as with in the clinical was in and in the group another a of the using a of was to a at was this group and a group in which were of was significant in clinical the approach was in the evidence not an a and clinical outcomes a of thiopurines in Crohn’s disease patients in on maintenance as the of is when the treatment is our meta-analysis to the two of in CD patients in on maintenance therapy [Supplementary available as Supplementary data at ECCO-JCC online]. from four trials were included received from to before randomised to or or to or All studies a time of to results that the of clinical is [Supplementary available as Supplementary data at ECCO-JCC online]. meta-analysis for was the data a with of the results were not significant [Supplementary available as Supplementary data at ECCO-JCC online]. for the be performed the data from the To the evidence for the of clinical is in of of as when the treatment was the of was not and from studies that patients treatment for are and this an important research from observational studies and for the of and in patients to treatment with The time and the of patients included in the studies of the meta-analysis are to and that may in the reviewed the literature to the approach of using thiopurines an literature we not evidence the two treatment one was of thiopurines was with thiopurines in the of therapy in patients with IBD. The was as was not to data from and CD specific was patients with Crohn’s disease who with the of and we with A Cochrane based on two the same patients who therapy with or [Supplementary available as Supplementary data at ECCO-JCC online]. The same the of for therapy or These results are to an of in the therapy studies included and studies are to the A of when agents are with the and were as 10 in one meta-analysis of patients included in the patients with Crohn’s disease who with the of and we with the basis of a meta-analysis of studies on by the data included were the and groups to be to the relevant PICO question. The result of this not any in maintenance of clinical therapy and [Supplementary and Supplementary available as Supplementary data at ECCO-JCC online]. this meta-analysis was to of in the studies with a are quality data available for clinical in the which is an that follows the of patients in the on the of were in patients with or at years of The meta-analysis by which was not any in with and therapy [Supplementary available as Supplementary data at ECCO-JCC online]. is evidence to or of therapy in Crohn’s disease patients the to therapy be and and be with the randomised

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The record

Venue

Journal of Crohn s and Colitis

Topic

Inflammatory Bowel Disease

Field

Biochemistry, Genetics and Molecular Biology

Canadian institutions

McMaster UniversityPopulation Health Research Institute

Funders

Aalborg UniversitetNational Institute for Health and Care ResearchEuropean Crohn's and Colitis Organisation

Keywords

MedicineCrohn's diseaseIntensive care medicineInflammatory bowel diseaseDiseaseInfliximabInternal medicine

Has abstract in OpenAlex

yes

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