Publications by authors named "Natalia Pedersen"

Article Synopsis
  • The incidence of inflammatory bowel disease (IBD) in the Faroe Islands has significantly increased over the last 60 years, raising concerns about environmental factors and genetic susceptibilities.
  • This study compared environmental factors between Faroese IBD patients and a Danish cohort, analyzing data from 2010 to 2022.
  • Findings revealed that Faroese patients had higher rates of specific vaccinations and childhood infections, different dietary habits, and variations in smoking behaviors compared to Danish patients.
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Background: Currently, there are no reliable biomarkers for predicting treatment response in chronic inflammatory diseases (CIDs).

Objective: To determine whether serum microfibrillar-associated protein 4 (MFAP4) levels can predict the treatment response to biological therapy in patients with CIDs.

Methods: The BELIEVE study was originally designed as a prospective, multi-center cohort study of 233 patients with either rheumatoid arthritis, psoriatic arthritis, psoriasis, axial spondyloarthritis, Crohn's disease, or ulcerative colitis, initiating treatment with a biologic agent (or switching to another).

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Article Synopsis
  • Chronic inflammatory diseases (CIDs) are increasingly challenging for healthcare, with many patients responding poorly to biological treatments, leading to interest in dietary changes, particularly gluten-free diets.
  • This study explored the effect of gluten intake on the clinical response to biological treatment over 14-16 weeks in 193 CID patients, comparing those with high gluten intake to those with low-to-medium intake.
  • Results showed no significant differences in treatment response or secondary outcomes, indicating that gluten intake does not influence the effectiveness of biological therapy in patients with CIDs.
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The prevalence and disease burden of chronic inflammatory diseases (CIDs) are predicted to rise. Patients are commonly treated with biological agents, but the individual treatment responses vary, warranting further research into optimizing treatment strategies. This study aimed to compare the clinical treatment responses in patients with CIDs initiating biologic therapy based on smoking status, a notorious risk factor in CIDs.

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Background: Biologic disease-modifying drugs have revolutionised the treatment of a number of chronic inflammatory diseases (CID). However, up to 60% of the patients do not have a sufficient response to treatment and there is a need for optimization of treatment strategies.

Objective: To investigate if the treatment outcome of biological therapy is associated with the habitual dietary intake of fibre and red/processed meat in patients with a CID.

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BACKGROUND: Whether infliximab therapy can be successfully discontinued after patients with Crohn’s disease have attained sustained, clinical, biochemical, and endoscopic remission is unknown. METHODS: We conducted a multicenter, randomized, double-blind, placebo-controlled withdrawal study of infliximab in patients with Crohn’s disease who were in clinical, biochemical, and endoscopic remission after standard infliximab maintenance therapy for at least 1 year. Patients were randomly assigned 1:1 to continue infliximab therapy or to receive matching placebo for 48 weeks.

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Background And Aims: The health consequences of coronavirus disease 2019 [COVID-19] among patients with ulcerative colitis [UC] and Crohn's disease [CD] remain largely unknown. We aimed to investigate the outcomes and long-term effects of COVID-19 in patients with UC or CD.

Methods: We conducted a prospective, population-based study covering all Danish patients with CD or UC and confirmed COVID-19 between January 28, 2020 and April 1, 2021, through medical records and questionnaires.

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Background: Data from real-life populations about vedolizumab as first-line biological therapy for ulcerative colitis (UC) and Crohn's disease (CD) are emerging.

Objective: To investigate the efficacy and safety of vedolizumab in bio-naïve patients with UC and CD.

Methods: A Danish nationwide cohort study was conducted between November 2014 and November 2019.

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Background & Aims: The Lémann Index is a tool measuring cumulative structural bowel damage in Crohn's disease (CD). We reported on its validation and updating.

Methods: This was an international, multicenter, prospective, cross-sectional observational study.

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Background And Aims: The disease course of microscopic colitis [MC] is considered chronic but benign. However, this assumption is based on mainly retrospective studies, reporting on incomplete follow-up of selective cohorts. Systematic, prospective and unbiased data to inform patients and healthcare professionals on the expected course of the disease and real-life response to therapy are warranted.

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Background And Aims: As no population-based study has investigated the susceptibility and disease course of COVID-19 among patients with inflammatory bowel diseases [IBD], we aimed to investigate this topic in a population-based setting.

Methods: Two cohorts were investigated. First, a nationwide cohort of all IBD patients diagnosed with COVID-19 was prospectively followed to investigate the disease courses of both diseases.

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Background: The lack of scientific evidence regarding the effectiveness of 5-aminosalicylate in patients with Crohn's disease is in sharp contrast to its widespread use in clinical practice.

Aims: The aim of the study was to investigate the use of 5-aminosalicylate in patients with Crohn's disease as well as the disease course of a subgroup of patients who were treated with 5-aminosalicylate as maintenance monotherapy during the first year of disease.

Methods: In a European community-based inception cohort, 488 patients with Crohn's disease were followed from the time of their diagnosis.

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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.

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Background: Anti-tumor necrosis factor-α (TNF-α) is used for the treatment of severe cases of IBD, including Crohn's disease (CD) and ulcerative colitis (UC). However, one-third of the patients do not respond to the treatment. We have previously investigated whether single nucleotide polymorphisms (SNPs) in genes involved in inflammation were associated with response to anti-TNF therapy among patients with CD or UC.

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Background And Aim: A definitive diagnosis of Crohn's disease (CD) or ulcerative colitis (UC) is not always possible, and a proportion of patients will be diagnosed as inflammatory bowel disease unclassified (IBDU). The aim of the study was to investigate the prognosis of patients initially diagnosed with IBDU and the disease course during the following 5 years.

Methods: The Epi-IBD study is a prospective population-based cohort of 1289 IBD patients diagnosed in centers across Europe.

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Article Synopsis
  • This study investigated the long-term outcomes of ulcerative colitis (UC) patients using a population-based cohort to understand the impact of modern treatments like biological therapy and immunomodulators over five years.
  • Out of 717 patients tracked, 6% required colectomy, and 23% were hospitalized, with some patients showing disease progression or regression.
  • Despite aggressive treatments, the overall disease outcomes (like colectomy rates) did not differ significantly from previous decades, but immunomodulators were linked to a lower risk of hospitalizations.
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Background: Serum vitamin D level is commonly low in patients with inflammatory bowel disease (IBD). Although there is a growing body of evidence that links low vitamin D level to certain aspects of IBD such as disease activity and quality of life, data on its prevalence and how it varies across disease phenotype, smoking status and treatment groups are still missing.

Materials And Methods: Patients diagnosed with IBD between 2010 and 2011 were recruited.

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Article Synopsis
  • - The Epi-IBD study followed 488 patients with Crohn's disease from various European centers to evaluate their outcomes over five years, focusing on surgery, hospitalizations, and progression of the disease.
  • - Of the patients studied, 22% underwent surgery, and 36% were hospitalized, with about 14% experiencing worsening disease conditions, yet outcomes between Western and Eastern European patients were largely similar.
  • - Significant differences in treatment approaches were observed, with Western Europeans more often receiving biological therapies and immunomodulators, which helped lower surgery and hospitalization risks, but did not ultimately change disease progression rates across regions.
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Background And Aims: Anaemia is an important complication of inflammatory bowel disease [IBD]. The aim of this study was to determine the prevalence of anaemia and the practice of anaemia screening during the first year following diagnosis, in a European prospective population-based inception cohort.

Methods: Newly diagnosed IBD patients were included and followed prospectively for 1 year in 29 European and one Australian centre.

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Aim: To investigate the effect of a low-FODMAP diet on irritable bowel syndrome (IBS)-like symptoms in patients with inflammatory bowel disease (IBD).

Methods: This was a randomised controlled open-label trial of patients with IBD in remission or with mild-to-moderate disease and coexisting IBS-like symptoms (Rome III) randomly assigned to a Low-FODMAP diet (LFD) or a normal diet (ND) for 6 wk between June 2012 and December 2013. Patients completed the IBS symptom severity system (IBS-SSS) and short IBD quality of life questionnaire (SIBDQ) at weeks 0 and 6.

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Aim: To investigate patient-reported outcomes from, and adherence to, a low FODMAP diet among patients suffering from irritable bowel syndrome and inflammatory bowel disease.

Methods: Consecutive patients with irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD) and co-existing IBS fulfilling the ROME III criteria, who previously attended an outpatient clinic for low FODMAP diet (LFD) dietary management and assessment by a gastroenterologist, were invited to participate in a retrospective questionnaire analysis. The questionnaires were sent and returned by regular mail and gathered information on recall of dietary treatment, efficacy, symptoms, adherence, satisfaction, change in disease course and stool type, and quality of life.

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Background: The inflammatory bowel diseases (IBD), Crohn's disease (CD) and ulcerative colitis (UC), result from the combined effects of susceptibility genes and environmental factors. Previous studies have shown that polymorphisms in the Toll-like receptor (TLR), the apoptosis, the IL-23/IL-17 and the interferon gamma (IFNG) pathways are associated with risk of both CD and UC.

Methods: Using a candidate gene approach, 21 functional single nucleotide polymorphisms (SNPs) in 15 genes were assessed in a clinical homogeneous group of severely diseased ethnic Danish patients consisting of 624 patients with CD, 411 patients with UC and 795 controls.

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Background: Inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS) are chronic gastrointestinal disorders of unknown aetiology of increasing incidence and changing disease activity or severity. Approximately 60-80% of IBD patients suffer from IBS. Monitoring and treatment goals of IBD are to optimise the disease course by prolonging remission periods and preventing or shortening periods of active disease.

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Background: Fecal calprotectin is a reliable noninvasive marker for intestinal inflammation usable for monitoring patients with inflammatory bowel disease. Tests are usually performed by enzyme-linked immunosorbent assay (ELISA), which is time consuming and delays results, thus limiting its use in clinical practice. Our aim was to evaluate CalproSmart, a new rapid test for fecal calprotectin performed by patients themselves at home, and compare it to gold standard ELISA.

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