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Background and Aims: Although fatigue is common in inflammatory bowel disease [IBD], its pathogenesis remains unclear. This study aimed to determine the prevalence of fatigue and its associated factors in a cohort of patients newly diagnosed with IBD., Methods: Patients ≥18 years old were recruited from the Inflammatory Bowel Disease South-Eastern Norway [IBSEN III] study, a population-based, observational inception cohort. Fatigue was assessed using the Fatigue Questionnaire and compared with data from a Norwegian general population. Univariate and multivariate linear and logistic regression analyses were performed to evaluate the associations of total fatigue [TF; continuous score] and substantial fatigue [SF; dichotomized score ≥4] with sociodemographic, clinical, endoscopic, laboratory, and other relevant patient data., Results: In total, 983/1509 [65.1%] patients with complete fatigue data were included (ulcerative colitis [UC], 68.2%; Crohn's disease [CD], 31.8%). The prevalence of SF was higher in CD [69.6%] compared with UC [60.2%] [p < 0.01], and in both diagnoses when compared to the general population [p < 0.001]. In multivariate analyses, depressive symptoms, pain intensity, and sleep disturbances were associated with increased TF for both diagnoses. In addition, increased clinical disease activity and Mayo endoscopic score were significantly associated with TF in UC, whereas all disease-related variables were insignificant in CD. Similar findings were observed for SF, except regarding the Mayo endoscopic score., Conclusions: SF affects approximately two-thirds of patients newly diagnosed with IBD. Fatigue was associated with depressive symptoms, sleep disturbances, and increased pain intensity in both diagnoses, while clinical and endoscopic activity were associated factors only in UC., (© The Author(s) 2023. Published by Oxford University Press on behalf of European Crohn’s and Colitis Organisation.)

Purpose: This unselected, population-based cohort study aimed to determine the level of health-related quality of life (HRQoL) in patients with Crohn's disease (CD) and ulcerative colitis (UC) at the time of diagnosis compared with a reference population and identify the demographic factors, psychosocial measures, and disease activity markers associated with HRQoL., Methods: Adult patients newly diagnosed with CD or UC were prospectively enrolled. HRQoL was measured using the Short Form 36 (SF-36) and Norwegian Inflammatory Bowel Disease Questionnaires. Clinical significance was assessed using Cohen's d effect size and further compared with a Norwegian reference population. Associations between HRQoL and symptom scores, demographic factors, psychosocial measures, and disease activity markers were analyzed., Results: Compared with the Norwegian reference population, patients with CD and UC reported significantly lower scores in all SF-36 dimensions, except for physical functioning. Cohen's d effect sizes for men and women in all SF-36 dimensions were at least moderate, except for bodily pain and emotional role for men with UC and physical functioning for both sexes and diagnoses. In the multivariate regression analysis, depression subscale scores ≥ 8 on the Hospital Anxiety and Depression Scale, substantial fatigue, and high symptom scores were associated with reduced HRQoL., Conclusion: Patients newly diagnosed with CD and UC reported statistically and clinically significantly lower scores in seven of the eight SF-36 dimensions than the reference population. Symptoms of depression, fatigue, and elevated symptom scores were associated with poorer HRQoL., (© 2023. The Author(s).)

Objectives: Immune responses following SARS-CoV-2 vaccination in patients with inflammatory bowel disease (IBD) are not well characterized. The aims of this study were to explore the serological response associated with IBD, and immunosuppressive medications including serum concentrations of biologics and thiopurine metabolites., Materials and Methods: This prospective, observational study included adult patients with ulcerative colitis (UC) and Crohn's disease (CD), and healthy controls. Antibodies to the receptor-binding domain of SARS-CoV-2 spike proteins, and serum concentrations of ongoing biologic and immunomodulatory medications were assessed prior to, and 2-5 weeks after the second vaccine dose. Serologic response was defined as anti-Spike antibodies ≥70 AU/ml., Results: In 958 IBD patients (380 UC, 578 CD) and 323 healthy controls, the median (Q 1; Q 3 ) anti-Spike antibody level (AU/ml) was lower in patients (618 (192; 4370)) compared to controls (3355 (896; 7849)) ( p  < 0.001). The antibody levels were lower in CD (439 (174; 3304)) compared to UC (1088 (251; 5975)) ( p  < 0.001). No associations were demonstrated between antibody levels and serum drug concentrations for TNF inhibitor (TNFi), vedolizumab and ustekinumab. Patients receiving TNFi + thiopurines with a subtherapeutic 6-thioguanine nucleotide (6-TGN) level had higher response rate (93%) compared to patients with 6-TGN within the therapeutic range (53%) ( p  = 0.003). A diagnosis of UC, mRNA-1273 vaccine, and other treatments than TNFi + thiopurines were associated with humoral response., Conclusions: Patients with CD had an attenuated humoral response to SARS-COV-2 vaccination as compared to patients with UC. The lack of association between serum levels of biologics and serologic response indicates vaccination regardless of proximity to drug administration.

The cost of caring for patients with inflammatory bowel disease (IBD) continues to increase worldwide. The cause is not only a steady increase in the prevalence of Crohn's disease and ulcerative colitis in both developed and newly industrialised countries, but also the chronic nature of the diseases, the need for long-term, often expensive treatments, the use of more intensive disease monitoring strategies, and the effect of the diseases on economic productivity. This Commission draws together a wide range of expertise to discuss the current costs of IBD care, the drivers of increasing costs, and how to deliver affordable care for IBD in the future. The key conclusions are that (1) increases in health-care costs must be evaluated against improved disease management and reductions in indirect costs, and (2) that overarching systems for data interoperability, registries, and big data approaches must be established for continuous assessment of effectiveness, costs, and the cost-effectiveness of care. International collaborations should be sought out to evaluate novel models of care (eg, value-based health care, including integrated health care, and participatory health-care models), as well as to improve the education and training of clinicians, patients, and policy makers., Competing Interests: Declaration of interests JB reports personal fees from AbbVie, Celgene, Pfizer, Samsung Bioepis, Pharmacosmos, Ferring, and Galapagos; grants and personal fees from Janssen, MSD, Takeda, Tillots Pharma, and Bristol Myers Squibb; and grants from Novo Nordisk. MZ has received support for attending a meeting from Takeda. PDC has received grants or contracts from Janssen, Takeda, Ferring, Shire, AbbVie, Celltrion, and Baxter. PDC has been a speaker, consultant, and advisory board member for AbbVie, Janssen, Takeda, Celltrion, Ferring, Shire, and Baxter; received support for travel or attending meetings or both from Ferring, Shire, Janssen, AbbVie, Takeda, Celltrion, and Baxter; and has been a member of the Australia and New Zealand IBD Research Consortium. SV has received research grants from Pfizer, Galapagos, AbbVie, Johnson & Johnson, and Takeda; consulting fees from AbbVie, AbolerIS Pharma, Agomab, Alimentiv, Arena Pharmaceuticals, AstraZeneca, Avaxia, Bristol Myers Squibb, Boehringer Ingelheim, Celgene, CVasThera, Cytoki Pharma, Dr Falk Pharma, Ferring, Galapagos, Genentech–Roche, Gilead, GSK, Hospira, Imidomics, Janssen, Johnson & Johnson, Eli Lilly, Materia Prima, MiroBio, Morphic, MrMHealth, Mundipharma, MSD, Pfizer, Prodigest, Progenity, Prometheus, Robarts Clinical Trials, Second Genome, Shire, Surrozen, Takeda, Theravance, Tillots Pharma, Zealand Pharma; speaker fees from Alimentiv, Bristol Myers Squibb, Boehringer Ingelheim, Celgene, Ferring, Galapagos, Genentech–Roche, Gilead, GSK, Janssen, Johnson & Johnson, Eli Lilly, Materia Prima, Pfizer, Takeda, and Tillots Pharma. CNB has served on advisory Boards for AbbVie Canada, Amgen Canada, Bristol Myers Squibb Canada, JAMP Pharma, Roche Canada, Janssen Canada, Sandoz Canada, Takeda Canada, and Pfizer Canada; is a consultant for Mylan Pharmaceuticals and Takeda; and educational grants from AbbVie Canada, Pfizer Canada, Takeda Canada, and Janssen Canada. CNB is on the speaker's panel for AbbVie Canada, Janssen Canada, Medtronic Canada, and Takeda Canada; and has received research funding from AbbVie Canada and Pfizer Canada. GGK has received honoraria for speaking or consultancy from AbbVie, Janssen, Pfizer, Amgen, Sandoz, Pendopharm, and Takeda. He has received research support from Ferring. He shares ownership of a patent: treatment of inflammatory disorders, autoimmune disease, and pbc (WO2019046959A1. PCT/CA2018/051098) since Sept 7, 2018. DD has received lecture or consultancy fees from Takeda, Janssen, and Pfizer, and support for travel or attending meetings or both from Janssen and Takeda. MW has received grants or contracts from Mitsubishi Tanabe Pharma, Takeda, Zeria Pharmaceutical, Nippon Kayaku, Mochida Pharmaceutical, Kyorin Pharmaceutical, AbbVie, EA Pharma, Kissei Pharmaceutical, and Alfresa Pharma; consulting fees from AbbVie, EA Pharma, Eli Lilly Japan, Gilead Sciences, Nippon Boehringer Ingelheim, and Takeda Pharmaceutical; and honoraria from EA Pharma, Mitsubishi Tanabe Pharma, Takeda Pharmaceutical, Zeria Pharmaceutical, Pfizer Japan, Kissei Pharmaceutical, Nippon Boehringer Ingelheim, Gilead Sciences, Janssen Pharmaceutical, Celltrion Healthcare, JIMRO, Eli Lilly Japan, and Mochida Pharmaceutical. LT has received grants or contracts from Janssen, AbbVie, Pfizer, Takeda, Roche, Gilead, Sandoz, and Amgen; consulting fees from Janssen, AbbVie, Pfizer, Takeda, Roche, Gilead, Sandoz, Amgen, Fresnius Kabi, and Viatris; and honoraria for lectures from Janssen, AbbVie, Pfizer, Takeda, Roche, Gilead, Sandoz, Amgen, and Organon. KP is an employee of Genentech–Roche and a shareholder of the Roche Group. KHK has served as speaker, consultant, and advisory member for or has received research funding from AbbVie, Amgen, Enorasis, Epsilon Health, Dr Falk Pharma, Faran Ferring, Genesis, Grifols, Janssen, Koper, MSD, Mylan, Shire, Takeda, and Vianex. MLH has received investigator-initiated research grants from Tillotts, Ferring, Takeda, and Pfizer; advisory board honoraria from Takeda and AbbVie; and speaking fees from Takeda, AbbVie, Tillotts, Ferring, Galapagos, Janssen, and MSD. ZK has served as speaker for AbbVie, Takeda, Janssen, Freseinus, and Oktal Pharma/Celltrion. MC has served as a speaker, as a consultant, or has received research or education funding from MSD, AbbVie, Hospira, Pfizer, Takeda, Janssen, Ferring, Shire Pharmaceuticals, Dr Falk Pharma, Tillotts Pharma, Biogen, Gilead, and Eli Lilly. EVL has received grants or contracts from AbbVie, Bristol Myers Squibb, Celgene/Receptos, Genentech, Gilead, Gossamer Bio, Janssen, Pfizer, Takeda, Theravance, and UCB; consulting fees from AbbVie, Amgen, Arena, Boehringer Ingelheim, Bristol Myers Squibb, Calibr, Celgene, Fresenius Kabi, Genentech, Gilead, Gossamer Bio, Janssen, Iterative Scopes, Ono Pharma, Pfizer, Protagonist, Scipher Medicine, Surrozen, Takeda, and UCB; reports the following patents: USA 11 249 084 (issued), USA 10 041 948 (issued), and USA 17 668 915 (pending); has participated on a data safety monitoring board or advisory board for Eli Lilly and Morphic; owns stock in Exact Sciences; and is a board member of Crohn's & Colitis Foundation, Minnesota-Dakotas Chapter. PLL has been a speaker or advisory board member, or both, for AbbVie, Amgen, BioJamp, Bristol Myers Squibb, Fresenius Kabi, Genentech, Gilead, Janssen, Merck, Mylan, Organon, Pendopharm, Pfizer, Roche, Takeda, Tillots, and Viatris, and has received unrestricted research grants from AbbVie, Gilead, Takeda, and Pfizer. JPG has served as a speaker, consultant, and advisory member for or has received research funding from MSD, AbbVie, Pfizer, Kern Pharma, Biogen, Mylan, Takeda, Janssen, Roche, Sandoz, Celgene/Bristol Myers Squibb, Gilead/Galapagos, Eli Lilly, Ferring, Faes Farma, Shire Pharmaceuticals, Dr Falk Pharma, Tillotts Pharma, Chiesi, Casen Fleet, Gebro Pharma, Otsuka Pharmaceutical, Norgine, and Vifor Pharma. WB has received research grants from Vifor Pharma and B Braun Medical; consulting fees from Takeda and B Braun Medical; speaker fees from Medtronic, Takeda, B Braun Medical, and Johnson & Johnson; and is a stock owner of Semiflex Company. RBG has received grants or contracts from AbbVie and Janssen; consulting fees from AbbVie; and honoraria for lectures from AbbVie and Cornerstone Health. MDK has received grants or contracts from Pfizer, Takeda, Janssen, AbbVie, Eli Lilly, Genentech, Boehringer Ingelheim, Bristol Myers Squibb, Celltrion, and Arenapharm; consulting fees from Takeda and Pfizer; speaker fees from AbbVie; has participated on data safety monitoring board or advisory board for Eli Lilly; and owns stock in Johnson & Johnson. MJP has received grants or contracts from Takeda, Janssen, Galapagos, Tramedico, MSD, Takeda, Janssen, and Bristol Myers Squibb; honoraria for lectures from Bristol Myers Squibb, Janssen, AbbVie, and Galapagos; consulting fees from Janssen and Gilead; and has a leadership or fiduciary role in the MyCoach foundation. JMA has served as speaker, consultant, and advisory member for AbbVie, Allergan, Anatara, Atmo Capsule, Bayer, Bristol Myers Squibb, Celgene, Celltrion, Dr Falk Pharma, Ferring Fresenius Kabi, Gilead, Hospira, Immuninc, ImmunsanT, Janssen, MSD, Nestle, Novartis, Pfizer, Sandoz, Shire, Takeda, and Vifor; has participated on a data safety monitoring board or advisory board for Janssen; has received research grants from the Royal Adelaide Hospital research fund, The Hospital Research Fund 2020–22, and The Helmsley Trust 2020–23. SCN has received grants or contracts from AbbVie, Ferring, and Olympus and Janssen; consulting fees from AbbVie, Pfizer, Ferring, and Janssen; honoraria for lectures from AbbVie, Ferring, Janssen, Menarini, Takeda, Tillotts and Pfizer; has participated on a data safety monitoring board or advisory board for AbbVie, Pfizer, Ferring, and Janssen; is a shareholder of GeniBiome; and is a director of the Microbiota I-Center, Hong Kong. HOM has received research grants from Takeda and Biogen, consulting fees from Takeda, and speaking fees from Pfizer and Biogen. All other authors declare no competing interests., (Copyright © 2023 Elsevier Ltd. All rights reserved.)

Background and Aims: The role of thiopurines in therapeutic algorithms of Crohn's disease (CD) and Ulcerative colitis (UC) is being questioned. This work aimed to investigate current practice and future perspectives of Inflammatory Bowel Disease (IBD) physicians regarding the efficacy, safety, and role of precision medicine with thiopurines in IBD., Methods: A 29-questions web-based survey was developed and distributed to IBD physicians worldwide., Results: We collected the complete answers of 408 physicians from 50 countries. Most participants were experienced physicians in IBD; 26.0% met our definition of "IBD expert". Four physicians reported to not use thiopurines in clinical practice. Most respondents used thiopurines in monotherapy and in combination therapy, both in CD and UC. Respondents tended to consider thiopurines as drugs with a good safety profile, with the agreement of 61.5% of the overall cohort. A minority of physicians (~6%) considered that thiopurines will not be used in the future in IBD patients, while 57.8% believed that these drugs will still be used, in mono and combination therapy., Conclusion: Despite the many emerging treatments in IBD, according to the beliefs of most physicians surveyed, thiopurines will still be an important part of the treatment algorithm of both CD and UC., Competing Interests: Conflict of interest statement P.S. and M.L.H report no conflicts of interest. P.M. is a consultant for Abbvie, Ferring, Hospira, Janssen, MSD, Pfizer, Takeda. A.A. received consulting and/or advisory board fees from AbbVie, Allergan, Amgen, Arena, Biogen, Bristol-Myers Squibb, Celgene, Celltrion, Eli-Lilly, Ferring, Gilead, Janssen, MSD, Mylan, Pfizer, Roche, Samsung Bioepis, Sandoz and Takeda; lecture and/or speaker bureau fees from AbbVie, Amgen, Biogen, Bristol-Myers Squibb, Ferring, Gilead, Janssen, MSD, Novartis, Pfizer, Roche, Sandoz, Samsung Bioepis, Takeda and Tigenix; and research grants from MSD, Pfizer and Takeda. A.D. has received research support or acted as a principal investigator for Abbvie, Dr. Falk Pharma, Celgene, Gilead, Janssen and Takeda; has acted as a consultant for AbbVie, Amgen, BMS, Boehringer Ingelheim, Celgene, Dr Falk Pharma, Ferring, Fresenius Kabi, Celltrion, Janssen, MSD, Pfizer, Roche, Takeda, Tillotts, Galapagos, Gilead, Pharmacosmos and Vifor; and has participated in speaker bureaus for AbbVie, Falk Foundation, Ferring, Janssen, Med Update, MSD, Pfizer, Roche, Takeda, Tillotts, and Vifor. M.B.A. has served as a speaker, consultant and advisory member for or has received research funding from MSD, AbbVie, Janssen, Kern Pharma, Celltrion, Takeda, Gillead, Celgene, Pfizer, Sandoz, Biogen, Fresenius, Ferring, Faes Farma, Dr. Falk Pharma, Chiesi, Gebro Pharma, Adacyte and Vifor Pharma. S.V. received consultant fees and unrestricted research grants from Abbott, Celtrion, Ferring, MSD, Pfizer, Sanofi-Aventis, Takeda, Tillots, UCB, Vifor and Falk Pharma. R.S.H. has received speaker fees from AbbVie, Janssen, Pfizer and Takeda. P.G.K has served as speaker and consultant for Abbvie, Janssen, Takeda, Pfizer, Novartis, and has received scientific grants from Takeda and Pfizer. L.P.-B. reports personal fees from Merck, Abbvie, Janssen, Ferring, Tillots, Celltrion, Takeda, Pfizer, Amgen, Biogen, Samsung Bioepis, Genentech, Vifor, Pharmacosmos, Biogaran, Boerhinger-Ingelheim, Lilly, Index Pharmaceuticals, Sandoz, Celgene, Alma, Sterna, Nestlé and Enterome. F.M. has served as a speaker and received honoraria from Merck Sharp & Dohme, Abbvie, Vifor, Falk, Laboratorios Vitoria, Ferring, Hospira, and Biogen., (Copyright © 2021. Published by Elsevier Ltd.)

Objectives: The use of biologic therapy in inflammatory bowel disease (IBD) is likely to increase with lower costs and more biologics and biosimilars becoming available. Our aim was to estimate the trends in use of first-line biologics during the first year after diagnosis in a Norwegian IBD population from 2010 to 2016., Methods: Data were collected from the Norwegian National Patient Registry and Norwegian Prescription Database. Patients defined as incident IBD cases between 2010 and 2016 were included and followed for 12 months. Patients were stratified by year of diagnosis to examine change over time. Chi-square test was used for calculations on proportions. Time from diagnosis to first biologic was calculated by Kaplan-Meier failure estimates., Results: 14,645 patients were included, 5283 (36%) with Crohn's disease (CD) and 9362 (64%) with ulcerative colitis (UC). In the 2010 and 2016 cohort, the proportion initiating biologics increased from 17% to 33% ( p  < .001) for CD and 7% to 13% ( p  < .001) for UC. The most frequently used first-line biologics were infliximab (CD: 64% and UC: 82%) and adalimumab (CD: 36% and UC: 15%). The highest registered use of adalimumab was in the 2012 cohort (CD: 56% and UC: 39%). In the 2014-2016 cohorts, infliximab was the most used first-line biologic for both CD and UC., Conclusions: The proportion of IBD patients initiating biologics within 12 months after diagnosis increased between 2010 and 2016. The use of infliximab as first-line biologic increased after the approval of biosimilar infliximab in 2013.

Our aim in this study was to analyze the importance of childbearing for risk of inflammatory bowel disease. Using data from the Norwegian Population Register and the Norwegian Patient Register, we fitted discrete-time hazard models for diagnosis of Crohn disease (CD) or ulcerative colitis (UC) among men and women aged 18-81 years in 2011-2016. Year and various sociodemographic factors were controlled for. The data included 4,304 CD cases and 8,866 UC cases. Women whose youngest child was ≤4 years of age had lower CD risk the following year than childless women (odds ratio (OR) = 0.73, 95% confidence interval (CI): 0.62, 0.86). There was no such reduction in CD risk among fathers. Men whose youngest child was aged ≥20 years had higher risks of CD (OR = 1.22, 95% CI: 1.01, 1.49) and UC (OR = 1.15, 95% CI: 1.02, 1.30) than childless men. UC risk was also increased among men whose youngest child was aged ≤4 years (OR = 1.14, 95% CI: 1.02, 1.27). The short-term reduction in women's CD risk after a birth may reflect biological effects of pregnancy. Alternatively, it may reflect residual confounding or lifestyle effects of parenthood that are of special relevance for CD in women. In particular, differences in use of oral contraceptives (which it was not possible to control for) may have contributed to the observed pattern., (© The Author(s) 2020. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)

Introduction: Serological antibodies have been associated with complicated disease course in Crohn's disease (CD), including the need for surgery. Aim: The aim of this study was to investigate if a panel of relevant antibodies could predict surgery in a prospective population-based cohort of patients with CD. Methods: The population-based IBSEN cohort has been followed prospectively for 20 years. At the 10- and 20-year follow-up, the following panel of serological antibodies was analysed: pANCA, ASCA IgA, ASCA IgG, anti-OmpC, anti-I2, and anti-CBir1. At the 20-year follow-up or until lost to follow-up, all CD-related surgeries were registered. Results: Serum was available from 159 patients at 10-year follow-up and 135 patients at 20-year follow-up. In 113 patients, serum was available at both time points. No significant change of antibody status (positive vs. negative) was found from 10-year to 20-year follow-up. Negative pANCA, positive ASCA IgA and positive ASCA IgG at 10-year follow-up were all individually associated with increased risk for CD-related surgery. There was no association between anti-OmpC, anti-I2 or anti-CBir1 and CD-related surgery. In a multiple regression model including disease location and behaviour, only stricturing or penetrating disease behaviour and negative pANCA remained significantly associated with higher odds for surgery. Conclusion: Positive ASCA IgA and IgG, and negative pANCA were associated with higher odds for CD-related surgery in univariate analysis. Since disease phenotype changes during the disease course, while serological antibodies are stable, our results support the use of pANCA, ASCA IgA and ASCA IgG as prognostic markers in CD.

Aim: To investigate if vitamin D deficiency is associated with fatigue in patients with inflammatory bowel disease (IBD)., Methods: IBD patients were recruited from nine hospitals in the southeastern and western regions of Norway to participate in a multicenter cross-sectional study lasting from March 2013 to April 2014. Data were collected by interviews, from medical records and laboratory tests. The Fatigue Questionnaire (FQ) was used to measure fatigue. Linear and logistic regression models were applied to explore the possible association between vitamin D deficiency and total fatigue scores and chronic fatigue, respectively. The analyses were adjusted for age, gender, disease activity, depressive symptoms and sleep disturbance., Results: In total, 405 patients were included in the analyses, of which 227 (56%) had Crohn's disease (CD) and 178 (44%) had ulcerative colitis (UC). Vitamin D deficiency (< 50 nmol/L) was present in half (203/405) of the patients. Chronic fatigue was reported by 116 (29%) of all included patients with substantial fatigue reported by 194 (48%). Vitamin D levels were neither associated with total fatigue nor with chronic fatigue. Higher total fatigue scores and chronic fatigue were both associated with increased disease activity scores in patients with UC and CD, but not with increased CRP or fecal calprotectin. In UC patients, female gender was associated with fatigue in the univariate analysis, but no such difference was found when adjusted for elevated disease activity scores. Sleep disturbance and more depressive symptoms were associated with total fatigue scores in both UC and CD patients, but with chronic fatigue only in CD patients., Conclusion: In this study, no significant association between fatigue and vitamin D deficiency in IBD patients was revealed., Competing Interests: Conflict-of-interest statement: The authors declare no conflicts of interest.

Background and Aims: During the last decades, substantial progress has been made in both medical and surgical treatment of inflammatory bowel disease (IBD). The aim of this study was to determine the use of anti-TNFs and surgery during the first 3 years after diagnosis in IBD patients across the four health regions in Norway using nationwide patient registry data., Methods: This study used nationwide data from the Norwegian Patient Registry. Cumulative incidence of anti-TNF exposure and major surgery was calculated for patients diagnosed in 2010-2012. The analyses were stratified by diagnosis and health region. All patients were followed for an equal period of 3 years from diagnosis., Results: The study population included 8,257 IBD patients first registered between 2010 and 2012, of whom 2,829 were diagnosed with Crohn's disease (CD) and 5,428 with ulcerative colitis (UC). Across Norway's health regions, the cumulative incidence of major surgery after 3 years varied from 11.4% to 17.1% for CD and from 4.6% to 6.9% for UC. The cumulative incidence of anti-TNF exposure varied from 20.9% to 31.4% for CD and from 8.0% to 13.5% for UC. The region with the lowest anti-TNF use had the highest surgery rates for both UC and CD., Conclusions: Cumulative incidence of anti-TNF exposure and surgery varied significantly across Norway's health regions during the three first years after IBD diagnosis.

Background: Patients with inflammatory bowel disease [IBD] often suffer from rheumatic manifestations, including inflammatory back disorders. The prevalence of these disorders late in the course of IBD is poorly investigated. The aim of this study was to estimate the prevalence of inflammatory back disorders in patients with IBD 20 years after diagnosis, and to investigate possible associations with IBD severity, HLA-B27, and the NOD2 genotype., Methods: A population-based cohort [the IBSEN study] was followed prospectively for 20 years. Information covering IBD activity and rheumatic diseases was collected at the regular follow-ups. HLA-B27 and NOD2 were analysed as present or absent., Results: At 20 years, 599 members of the original cohort were alive, of whom 470 [78.5%] were investigated [314 ulcerative colitis and 156 Crohn's disease patients]. Ankylosing spondylitis was diagnosed in 21 patients [4.5%], axial spondyloarthritis was diagnosed in 36 patients [7.7%], and inflammatory back pain was diagnosed in 54 patients [11.5%]. Chronic back pain [back pain > 3 months] was present in 220 patients [46.8%]. HLA-B27 was associated with ankylosing spondylitis, axial spondyloarthritis, and inflammatory back pain, whereas no significant association was found for NOD2. A more chronic IBD course was associated with axial spondyloarthritis., Conclusions: Our data revealed a high prevalence of ankylosing spondylitis, axial spondyloarthritis, and inflammatory back pain 20 years after the IBD diagnosis. HLA-B27 but not NOD-2 was a predisposing factor for the inflammatory back disorders in IBD patients. Axial spondyloarthritis was associated with a more chronic active IBD disease course., (Copyright © 2017 European Crohn’s and Colitis Organisation (ECCO). Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com)

Background: With 25% prevalence of Crohn's disease, Familial GUCY2C diarrhea syndrome (FGDS) is a monogenic disorder potentially suited to study initiating factors in inflammatory bowel disease (IBD). We aimed to characterize the impact of an activating GUCY2C mutation on the gut microbiota in patients with FGDS controlling for Crohn's disease status and to determine whether changes share features with those observed in unrelated patients with IBD., Methods: Bacterial DNA from fecal samples collected from patients with FGDS (N = 20), healthy relatives (N = 11), unrelated healthy individuals (N = 263), and IBD controls (N = 46) was subjected to sequencing of the V3-V4 region of the 16S rRNA gene to determine gut microbiota composition. Food frequency questionnaires were obtained from patients with FGDS and their relatives., Results: Compared with healthy controls, FGDS displayed prominent changes in many microbial lineages including increase in Enterobacteriaceae, loss of Bifidobacterium and Faecalibacterium prausnitzii but an unchanged intraindividual (alpha) diversity. The depletion of F. prausnitzii is in line with what is typically observed in Crohn's disease. There was no significant difference in the dietary profile between the patients and related controls. The gut microbiota in related and unrelated healthy controls was also similar, suggesting that diet and familial factors do not explain the gut microbiota alterations in FGDS., Conclusions: The findings support that the activating mutation in GUCY2C creates an intestinal environment with a major influence on the microbiota, which could contribute to the increased susceptibility to IBD in patients with FGDS.

Background and Aims: A biosimilar version of infliximab [CT-P13/Remsima®] recently entered the European market. The clinical data on its use in inflammatory bowel disease [IBD] are sparse, especially on switching from the originator Remicade®. In this study, we aimed to prospectively investigate the feasibility, safety and immunogenicity of switching from Remicade to Remsima in a real-life IBD population., Methods: All adult patients who were treated with Remicade in the Department of Gastroenterology at Oslo University Hospital were switched to Remsima. The follow-up lasted for 6 months. In addition, a retrospective registration was performed with a start time of 6 months before switching drugs. The primary endpoints were [i] the proportion of patients remaining on medication 6 months after switching and [ii] adverse events during the 6 months after switching. The secondary endpoints included [i] disease activity scores [Harvey-Bradshaw Index and Partial Mayo Score], C-reactive protein, haemoglobin, faecal calprotectin, infliximab dose and interval, and p-infliximab and [ii] the development of antidrug antibodies., Results: In total, 143 IBD patients were switched, 99 with Crohn's disease and 44 with ulcerative colitis. The large majority [97%] remained on the medication throughout follow-up. A low number of adverse events were observed. No change in disease activity, C-reactive protein, haemoglobin, faecal calprotectin, infliximab dose and interval or p-infliximab was detected. Three patients developed new detectable antidrug antibodies., Conclusions: Switching from Remicade to Remsima was feasible and with few adverse events, including very limited antidrug antibody formation and loss of response., (Copyright © 2016 European Crohn’s and Colitis Organisation (ECCO). Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com)

Background & Aims: The prevalence of primary sclerosing cholangitis (PSC) among patients with inflammatory bowel disease (IBD) is unclear. Patients with IBD might be screened for PSC using magnetic resonance cholangiography (MRC). We aimed to estimate the frequency and distribution of MRC-detected lesions that indicate PSC in patients with IBD 20 years after their initial diagnosis and to identify clinical characteristics associated with these findings., Methods: We performed a follow-up analysis of a population-based cohort of 756 patients in South-Eastern Norway diagnosed with IBD from January 1, 1990 through December 31, 1993. Of these subjects, 470 attended a follow-up evaluation 20 years later in which they were offered routine clinical blood testing and ileocolonoscopy; 322 were screened by MRC (222 with ulcerative colitis and 100 with Crohn's disease). Two radiologists independently evaluated results from the MRC examinations., Results: In the MRC examination, 24 patients (7.5%) were found to have PSC-like lesions; only 7 of these patients (2.2%) were known to have PSC. One patient was initially missed and 1 had small-duct PSC, so the final prevalence of PSC was 8.1%. Extensive colitis, a high prevalence of colectomy, and chronic and continuous symptoms of IBD occurred in significantly more patients with suspected PSC than without PSC (P = .029, P = .002, and P = .012, respectively). Among patients with subclinical features of PSC, the MRC progression score for PSC increased when they were re-examined after a median 3.2 years (P = .046)., Conclusions: Using MRC analysis of patients with long-term IBD, we found the prevalence of PSC to be around 3-fold higher than that detected based on symptoms. Sixty-five percent of patients had subclinical PSC associated with progressive IBD, with no biochemical abnormalities and mild disease, based on radiology findings. PSC appears to progress in patients with subclinical disease, but long-term outcomes are not known., (Copyright © 2016 AGA Institute. Published by Elsevier Inc. All rights reserved.)

Background: The point prevalence estimates of anaemia in patients with inflammatory bowel disease (IBD) range between 6% and 74%. The variation is probably due to differences in the definition of anaemia and the study populations., Aim: To retrospectively determine the prevalence of anaemia at diagnosis and at the 1-, 5- and 10-year follow-ups in patients with IBD from a prospectively followed, population-based inception cohort (the IBSEN Study). To compare the prevalence of anaemia after a 10-year disease course with the prevalence of anaemia in the background population, and to assess clinical factors associated with anaemia at diagnosis and during follow-up., Methods: Newly diagnosed IBD patients were included in a population-based, prospective cohort. Follow-up was performed at 1, 5 and 10 years. All visits included clinical examinations and blood samples. Anaemia was defined according to the WHO., Results: A total of 756 patients (UC, n = 519 and CD, n = 237) were included; 48.8% of CD and 20.2% of UC patients were anaemic at diagnosis (P < 0.001). The proportion of patients with anaemia decreased during the disease course in all patients, except in women with CD. After 10 years of disease, the relative risk for anaemia was increased in all groups, except for women with UC. The variables associated with anaemia were generally unchanged during the disease course, and elevated CRP was the strongest predictor of risk., Conclusions: Anaemia was more common in CD than in UC. The prevalence of anaemia decreased during the disease course. Women with CD were at high risk for anaemia. Elevated CRP was independently associated with anaemia., (© 2013 John Wiley & Sons Ltd.)

Objective: To compare the work disability (WD) rate in inflammatory bowel disease (IBD) patients 10 years after disease onset, with the WD rate in the background population,and to assess whether clinical or demographic factors in the early disease course could predict WD after 10 years disease., Design: A large, population-based inception cohort (the Inflammatory Bowel in South Eastern Norway cohort) was prospectively followed up at 1, 5 and 10 years after diagnosis. At the 10-year follow-up data on WD were collected. Data on disability pension (DP) in the background population were retrieved from public databases. We calculated overall and age-standardised relative risks (RR) for DP. Logistic regression analysis was used to examine predictive factors., Results: A total of 518 patients completed the 10-year follow-up (response rate 83.5%). The overall disability rate in the IBD population was 18.8%, and the RR was 1.8 (95% CI 1.4 to 2.3) for ulcerative colitis (UC) and 2.0 (95% CI 1.4 to 2.7) for Crohn's disease (CD). The RR for DP was highest in patients aged below 40 years while patients aged over 60 years had no increased RR. Steroid treatment at the 1-year follow-up predicted WD after 10 years disease in both CD and UC. In UC, increased C-reactive protein (CRP) or erythrocyte sedimentation rate (ESR) at diagnosis, early colectomy, and more than two relapses during the first year of the disease also predicted WD., Conclusion: Ten years after disease onset IBD patients had an increased RR for DP as compared with the background population. The youngest patients had the highest RR. Markers of severe disease course predicted WD.

Background and Aims: Data on the long-term effects of Crohn's disease (CD) on health-related quality of life (HRQoL) is scarce. We aimed to determine the HRQoL in CD patients 10 years after disease onset, to compare the results to the general population and to identify variables that could affect HRQoL., Methods: CD patients from a population-based inception cohort (the IBSEN Study) met at a prescheduled ten-year follow-up. In addition to a structured interview, review of hospital records, clinical examination, laboratory tests and ileocolonoscopy, they completed a patient-reported questionnaire including the Short Form 36 (SF-36) and the Norwegian Inflammatory Bowel Disease Questionnaire (N-IBDQ). The SF-36 scores were compared to scores from the general population using one-sample t-tests. Standardized scores were calculated and interpreted according to Cohen's effect size index. The associations between relevant clinical and demographic factors and HRQoL were examined through linear regression analyses., Results: Ninety-nine patients completed the HRQoL questionnaires (response rate 86%). Median age 39 years, 42% women. Compared to the general population the patients reported significantly lower SF-36 scores on the general health and vitality dimensions. IBDQ total scores were in line with scores of patients in remission. Except for current symptom severity no clinical parameters affected HRQoL scores. Work status and sick leave affected HRQoL negatively., Conclusions: In this chronic stage of CD, reduced general health and vitality scores need attention while reductions in disease specific HRQoL seem to be less predominant., (Copyright © 2011 European Crohn's and Colitis Organisation. Published by Elsevier B.V. All rights reserved.)