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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: Inflammatory bowel disease (IBD) places a significant burden on health-care systems because of its chronicity and need for expensive therapies and surgery. With increasing use of biological therapies, contemporary data on IBD health-care costs are important for those responsible for allocating resources in Europe. To our knowledge, no prospective long-term analysis of the health-care costs of patients with IBD in the era of biologicals has been done in Europe. We aimed to investigate cost profiles of a pan-European, community-based inception cohort during 5 years of follow-up., Methods: The Epi-IBD cohort is a community-based, prospective inception cohort of unselected patients with IBD diagnosed in 2010 at centres in 20 European countries plus Israel. Incident patients who were diagnosed with IBD according to the Copenhagen Diagnostic Criteria between Jan 1, and Dec 31, 2010, and were aged 15 years or older the time of diagnosis were prospectively included. Data on clinical characteristics and direct costs (investigations and outpatient visits, blood tests, treatments, hospitalisations, and surgeries) were collected prospectively using electronic case-report forms. Patient-level costs incorporated procedures leading to the initial diagnosis of IBD and costs of IBD management during the 5-year follow-up period. Costs incurred by comorbidities and unrelated to IBD were excluded. We grouped direct costs into the following five categories: investigations (including outpatient visits and blood tests), conventional medical treatment, biological therapy, hospitalisation, and surgery., Findings: The study population consisted of 1289 patients with IBD, with 1073 (83%) patients from western Europe and 216 (17%) from eastern Europe. 488 (38%) patients had Crohn's disease, 717 (56%) had ulcerative colitis, and 84 (6%) had IBD unclassified. The mean cost per patient-year during follow-up for patients with IBD was €2609 (SD 7389; median €446 [IQR 164-1849]). The mean cost per patient-year during follow-up was €3542 (8058; median €717 [214-3512]) for patients with Crohn's disease, €2088 (7058; median €408 [133-1161]) for patients with ulcerative colitis, and €1609 (5010; median €415 [92-1228]) for patients with IBD unclassified (p<0·0001). Costs were highest in the first year and then decreased significantly during follow-up. Hospitalisations and diagnostic procedures accounted for more than 50% of costs during the first year. However, in subsequent years there was a steady increase in expenditure on biologicals, which accounted for 73% of costs in Crohn's disease and 48% in ulcerative colitis, in year 5. The mean annual cost per patient-year for biologicals was €866 (SD 3056). The mean yearly costs of biological therapy were higher in patients with Crohn's disease (€1782 [SD 4370]) than in patients with ulcerative colitis (€286 [1427]) or IBD unclassified (€521 [2807]; p<0·0001)., Interpretation: Overall direct expenditure on health care decreased over a 5-year follow-up period. This period was characterised by increasing expenditure on biologicals and decreasing expenditure on conventional medical treatments, hospitalisations, and surgeries. In light of the expenditures associated with biological therapy, cost-effective treatment strategies are needed to reduce the economic burden of inflammatory bowel disease., Funding: Kirsten og Freddy Johansens Fond and Nordsjællands Hospital Forskningsråd., (Copyright © 2020 Elsevier Ltd. All rights reserved.)