scholarly journals Is Oxidative Stress Associated with Activation and Pathogenesis of Inflammatory Bowel Disease?

2017 ◽  
Vol 36 (4) ◽  
pp. 341-348 ◽  
Author(s):  
Mahmut Yuksel ◽  
Ihsan Ates ◽  
Mustafa Kaplan ◽  
Mehmet Fettah Arikan ◽  
Yasemin Ozderin Ozin ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Inflammatory Bowel Disease ◽  
Disease Activity ◽  
Bowel Disease ◽  
Activity Index ◽  
Colorimetric Method ◽  
Control Group ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Inflammatory Bowel

SummaryBackground: We aimed to determine the levels of total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI) and paraoxonase1/arylesterase levels in inflammatory bowel disease (IBD), and the relation be - tween these molecules and the activity index of the disease. Methods: Eighty IBD patients (ulcerative colitis (UC)/Crohn disease (CD) 40/40) and 80 control group participants were included in the study. Oxidative stress parameters were measured using the colorimetric method. As disease activity indexes, the endoscopic activity index (EAI) was used for UC and the CD activity index (CDAI) was used for CD. Results: In IBD patients, mean TAS (1.3±0.2 vs 1.9±0.2, respectively; p<0.001) and arylesterase (963.9±232.2 vs 1252.9±275, respectively; p<0.001) levels were found to be lower and TOS level (5.6±1.6 vs 4.0±1.0, respectively; p<0.001) and OSI rate (4.5±1.6 vs 2.2±0.8, respectively; p<0.001) were found to be higher compared to the control group. A strong positive correlation was found between EAI and TOS levels (r=0.948, p<0.001) and OSI rate (r=0.894, p<0.001) for UC patients. A very strong positive correlation was found between EAI and TOS levels (r=0.964, p<0.001) and OSI rate (r=0.917, p<0.001) for CD patients. It was found in a stepwise regression model that C-reactive protein, OSI and arylesterase risk factors were predictors of IBD compared to the control group. Conclusion: Increased oxidative stress level in IBD patients and the detection of OSI rate as an independent predictor for disease activity indexes lead to the idea that oxidative stress might be related to the pathogenesis of IBD.

Validation of the “German Inflammatory Bowel Disease Activity Index (GIBDI)”: An Instrument for Patient-Based Disease Activity Assessment in Crohn’s Disease and Ulcerative Colitis

2018 ◽  
Vol 56 (10) ◽  
pp. 1267-1275 ◽  
Author(s):  
Angelika Hüppe ◽  
Jana Langbrandtner ◽  
Winfried Häuser ◽  
Heiner Raspe ◽  
Bernd Bokemeyer
Keyword(s):  
Ulcerative Colitis ◽  
Inflammatory Bowel Disease ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Disease Activity ◽  
Bowel Disease ◽  
Activity Index ◽  
Disease Activity Index ◽  
Inflammatory Bowel ◽  
Activity Indices

Abstract Introduction Assessment of disease activity in Crohn’s disease (CD) and ulcerative colitis (UC) is usually based on the physician’s evaluation of clinical symptoms, endoscopic findings, and biomarker analysis. The German Inflammatory Bowel Disease Activity Index for CD (GIBDICD) and UC (GIBDIUC) uses data from patient-reported questionnaires. It is unclear to what extent the GIBDI agrees with the physicians’ documented activity indices. Methods Data from 2 studies were reanalyzed. In both, gastroenterologists had documented disease activity in UC with the partial Mayo Score (pMS) and in CD with the Harvey Bradshaw Index (HBI). Patient-completed GIBDI questionnaires had also been assessed. The analysis sample consisted of 151 UC and 150 CD patients. Kappa coefficients were determined as agreement measurements. Results Rank correlations were 0.56 (pMS, GIBDIUC) and 0.57 (HBI, GIBDICD), with p < 0.001. The absolute agreement for 2 categories of disease activity (remission yes/no) was 74.2 % (UC) and 76.6 % (CD), and for 4 categories (none/mild/moderate/severe) 60.3 % (UC) and 61.9 % (CD). The kappa values ranged between 0.47 for UC (2 categories) and 0.58 for CD (4 categories). Discussion There is satisfactory agreement of GIBDI with the physician-documented disease activity indices. GIBDI can be used in health care research without access to assessments of medical practitioners. In clinical practice, the index offers a supplementary source of information.

scholarly journals Predictive value of fibrinogen in identifying inflammatory bowel disease in active stage

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xiao-Fu Chen ◽  
Yuan Zhao ◽  
Yu Guo ◽  
Zhi-Ming Huang ◽  
Xie-Lin Huang
Keyword(s):  
Inflammatory Bowel Disease ◽  
Confidence Interval ◽  
Disease Activity ◽  
Bowel Disease ◽  
Odds Ratio ◽  
Activity Index ◽  
Characteristic Curve ◽  
Disease Activity Index ◽  
Mayo Score ◽  
Inflammatory Bowel

Abstract Background We aimed to externally validate for the first time the diagnostic ability of fibrinogen to identify active inflammatory bowel disease (IBD). Methods The research totally involved 788 patients with IBD, consisted of 245 ulcerative colitis (UC) and 543 Crohn’ s disease (CD). The Mayo score and Crohn disease activity index (CDAI) assessed disease activity of UC and CD respectively. The independent association between fibrinogen and disease activity of patients with UC or CD was investigated by multivariate logistic regression analyses. Area under the receiver operating characteristic curve (AUROC) assessed the performance of various biomarkers in discriminating disease states. Results The fibrinogen levels in active patients with IBD significantly increased compared with those in remission stage (P < 0.001). Fibrinogen was an independent predictor to distinguish disease activity of UC (odds ratio: 2.247, 95% confidence interval: 1.428–3.537, P < 0.001) and CD (odds ratio: 2.124, 95% confidence interval: 1.433–3.148, P < 0.001). Fibrinogen was positively correlated with the Mayo score (r = 0.529, P < 0.001) and CDAI (r = 0.625, P < 0.001). Fibrinogen had a high discriminative capacity for both active UC (AUROC: 0.806, 95% confidence interval: 0.751–0.861) and CD (AUROC: 0.869, 95% confidence interval: 0.839–0.899). The optimum cut-off values of fibrinogen 3.22 was 70% sensitive and 77% specific for active UC, and 3.87 was 77% sensitive and 81% specific for active CD respectively. Conclusions Fibrinogen is a convenient and practical biomarker to identify active IBD.

scholarly journals Correlating Gastrointestinal Histopathologic Changes to Clinical Disease Activity in Dogs With Idiopathic Inflammatory Bowel Disease

2018 ◽  
Vol 56 (3) ◽  
pp. 435-443 ◽  
Author(s):  
Karin A. Allenspach ◽  
Jonathan P. Mochel ◽  
Yingzhou Du ◽  
Simon L. Priestnall ◽  
Frances Moore ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Disease Activity ◽  
Bowel Disease ◽  
Scoring System ◽  
Activity Index ◽  
Clinical Disease ◽  
Clinical Activity ◽  
Clinical Disease Activity ◽  
Inflammatory Bowel ◽  
Histopathologic Changes

Prior studies have failed to detect a convincing association between histologic lesions of inflammation and clinical activity in dogs with inflammatory bowel disease (IBD). We hypothesized that use of a simplified histopathologic scoring system would improve the consistency of interpretation among pathologists when describing histologic lesions of gastrointestinal inflammation. Our aim was to evaluate the correlation of histopathologic changes to clinical activity in dogs with IBD using this new system. Forty-two dogs with IBD and 19 healthy control dogs were enrolled in this retrospective study. Endoscopic biopsies from the stomach, duodenum, ileum, and colon were independently scored by 8 pathologists. Clinical disease activity was scored using the Canine Inflammatory Bowel Disease Activity Index (CIBDAI) or the Canine Chronic Enteropathy Clinical Activity Index (CCECAI), depending on the individual study center. Summative histopathological scores and clinical activity were calculated for each tissue (stomach, duodenum, ileum, and colon) and each tissue histologic score (inflammatory/morphologic feature). The correlation between CCECAI/CIBDAI and summative histopathologic score was significant ( P < .05) for duodenum ( r = 0.42) and colon ( r = 0.33). In evaluating the relationship between histopathologic scores and clinical activity, significant ( P < .05) correlations were observed for crypt dilation ( r = 0.42), lamina propria (LP) lymphocytes ( r = 0.40), LP neutrophils ( r = 0.45), mucosal fibrosis ( r = 0.47), lacteal dilation ( r = 0.39), and villus stunting ( r = 0.43). Compared to earlier grading schemes, the simplified scoring system shows improved utility in correlating histopathologic features (both summative histology scores and select histologic scores) to IBD clinical activity.

scholarly journals The association between inflammatory potential of diet and disease activity: results from a cross-sectional study in patients with inflammatory bowel disease

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Carlijn R. Lamers ◽  
Nicole M. de Roos ◽  
Ben J. M. Witteman
Keyword(s):  
Ulcerative Colitis ◽  
Inflammatory Bowel Disease ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Disease Activity ◽  
Bowel Disease ◽  
Activity Index ◽  
Statistical Significance ◽  
Inflammatory Bowel ◽  
Anti Inflammatory

Abstract Background Diet may play a role in disease status in patients with inflammatory bowel disease. We tested whether the inflammatory potential of diet, based on a summation of pro- and anti-inflammatory nutrients, is associated with disease activity in patients with Crohn’s disease and ulcerative colitis. Methods Participants completed a disease activity questionnaire (short Crohn’s Disease Activity (sCDAI) or Patient Simple Clinical Colitis Activity Index (P-SCCAI)) and a Food Frequency Questionnaire (FFQ). FFQ data were used to calculate the Dietary Inflammatory Index (DII) which enables categorization of individuals’ diets according to their inflammatory potential on a continuum from pro- to anti-inflammatory. Associations with disease activity were investigated by multiple linear regression. Results The analysis included 329 participants; 168 with Crohn’s disease (median sCDAI score 93 [IQR 47–156]), and 161 with ulcerative colitis (median P-SCCAI score 1 [IQR 1–3]). Mean DII was 0.71 ± 1.33, suggesting a slightly pro-inflammatory diet. In Crohn’s disease, the DII was positively associated with disease activity, even after adjustment for confounders (p = 0.008). The mean DII was significantly different between participants in remission and with mild and moderately active disease (0.64, 0.97 and 1.52 respectively, p = 0.027). In ulcerative colitis, the association was not significant. Conclusions Disease activity was higher in IBD participants with a more pro-inflammatory diet with statistical significance in Crohn’s disease. Although the direction of causality is not clear, this association strengthens the role for diet in medical treatment, which should be tested in an intervention study.

scholarly journals P430 Feasibility and reliability of gastrointestinal ultrasound in pregnant inflammatory bowel disease patients

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S391-S393
Author(s):  
F de Voogd ◽  
H Joshi ◽  
E Van Wassenaer ◽  
G D’Haens ◽  
K Gecse
Keyword(s):  
Inflammatory Bowel Disease ◽  
Disease Activity ◽  
Terminal Ileum ◽  
Bowel Disease ◽  
Activity Index ◽  
Third Trimester ◽  
Faecal Calprotectin ◽  
Gastrointestinal Ultrasound ◽  
Inflammatory Bowel ◽  
Active Disease

Abstract Background Disease activity during pregnancy in women with inflammatory bowel disease (IBD) is associated with miscarriage, preterm delivery and low birth weight. Monitoring disease activity throughout the pregnancy is therefore important. Gastrointestinal ultrasound (GIUS) has a high potential as a point-of-care tool for monitoring disease activity in IBD as it has been shown to correlate well with endoscopy and magnetic resonance imaging. However, data are scarce on the use of GIUS in IBD throughout pregnancy. The aim of this prospective study is to determine the feasibility and reliability of GIUS in pregnant IBD patients. Methods Patients were included when visiting the outpatient IBD pregnancy clinic. At each trimester, clinical and biochemical disease activity was evaluated and GIUS was performed. Feasibility was assessed by the ability to visualise each bowel segment (terminal ileum (TI), ascending (AC), transverse (TC), descending (DC) and sigmoid colon (SC)). Reliability was evaluated by using clinical and biochemical disease activity as a gold standard. This was defined as a Harvey–Bradshaw Index ≥4 in Crohn’s disease (CD) or a Simple Clinical Colitis Activity Index ≥5 in ulcerative colitis and a faecal calprotectin (FCP)³ 250 mg/g. Bowel wall thickness (BWT) of &gt; 3 mm in the colon and &gt; 2mm in the terminal ileum was considered as signs of active inflammation on ultrasound. A Mann–Whitney U-test and chi-square were used for statistical analysis. Results Thirty-two IBD patients (54% CD) were studied. Both a GIUS and FCP was available in 18, 11 and 6 patients for the first, second and third trimester, respectively. Eleven of 32 (34%) patients had clinically active disease at least at one time point during the pregnancy. Table 1 shows the visibility per segment. When the active disease was defined as an FCP ≥ 250 mg/g, GIUS could distinguish active from the non-active disease in the first, second and third trimester with a sensitivity of 80%, 75% and 75% and specificity of 85%, 86% and 100%, respectively. FCP levels were significantly higher in patients with an active disease on GIUS regardless of the trimester (mean 1095.5 ± 1453.8 mg/g vs. 265.25 ± 649.8 mg/g, p &lt; 0.0001). Conclusion GIUS is accurate to distinguish active from the quiescent disease in pregnancy. Feasibility to visualise the TI and the SC decreased during the second and third trimester, although active disease could still be detected. Consequently, GIUS is feasible and reliable to assess disease activity throughout pregnancy in IBD.

scholarly journals The Crohn’s Disease Activity Index, Its Derivatives and the Inflammatory Bowel Disease Questionnaire: A Review of Instruments to Assess in Crohn’s Disease

1999 ◽  
Vol 13 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Eric M Yoshida
Keyword(s):  
Inflammatory Bowel Disease ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Disease Activity ◽  
Bowel Disease ◽  
Activity Index ◽  
Disease Activity Index ◽  
Inflammatory Bowel Disease Questionnaire ◽  
Inflammatory Bowel ◽  
Disease Questionnaire

The Crohn’s Disease Activity Index (CDAI) has been used to measure Crohn’s activity for over a quarter of a century. The development of the CDAI is reviewed and its reliability and validity are examined. Instruments used to assess Crohn’s disease that were developed subsequent to the CDAI, including the Harvey-Bradshaw Index, the Cape Town Index and a three-variable version of the CDAI (modified for survey research), are similarly reviewed. The most recent instrument to assess Crohn’s disease, the Inflammatory Bowel Disease Questionnaire, which assesses patients in the domains of bowel, systemic, emotional and social function, is also discussed.

scholarly journals P275 Biological therapies for patients with Crohn’s disease: More options mean less surgical interventions

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S288-S289
Author(s):  
Y F Chin ◽  
O PUJJI ◽  
B Wilkinson ◽  
S Mohan ◽  
M Nnaji ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Bowel Disease ◽  
Strong Positive Correlation ◽  
Biological Therapies ◽  
Free Survival ◽  
Positive Correlation ◽  
Surgical Data ◽  
Inflammatory Bowel

Abstract Background The advent of biologic therapy and their acceptance into mainstream use for the medical management of patients with inflammatory bowel disease (IBD) has transformed the landscape of treatment for this condition. It has particularly become a mainstay in the treatment of fistulating or perianal Crohn’s Disease (CD). Data have shown that overall, 70% of patients will require surgical resections for CD. Consequently, questions have endured regarding the effect of biologic medications on the overall treatment course of CD patients. Our aim is to identify the efficacy of biologics by measuring surgical free survival. We subcategorised the period into 3 categories, including periods less than a year 1–5 years and &gt;5 years and comparing these with the number of biologics they required to be switched either due to side effects or loss of medical response. Methods A retrospective analysis of prospectively collected data was correlated with the clinical coding department, inflammatory bowel disease and surgical databases. Patients receiving biological therapies were identified (Infliximab, Adalimumab, Vedolizumab, Ustekinumab, Certolizumab). Demographics, clinical and surgical data were analysed. Results Sixty-six patients were included in our analysis. Male to female ratio is 1 to 1.07, age range was 18–77, median age 41 (SD:17.46) years old. Twenty-five patients had ileocaecal resection, 17 had hemi and segmental colectomy, 7 had small bowel resection, 10 had subtotal colectomy and 7 had panproctocolectomy. Refractory to one biologic does not indicate biological failure; number of biologics switched and surgical free survival were compared. We have utilised the Spearman correlation coefficient for nominal analysis which gave us a coefficient of +0.725, p = 0.00. This indicates that both factors have a strong positive correlation between numbers of biologics patients used against period required for surgical management. Conclusion In the current era of biological therapies, with a breadth of choice of therapeutic agents, our data has a positive correlation between the number of biological agents used and surgery-free survival for patients with Crohn’s disease. A multidisciplinary approach to the management of these patients should be personalised, and suitability to each biological agent should be considered in addition to close surgical observation.

scholarly journals Anemia in inflammatory bowel disease: prevalence, differential diagnosis and association with clinical and laboratory variables

2014 ◽  
Vol 132 (3) ◽  
pp. 140-146 ◽  
Author(s):  
Rodrigo Andrade Alves ◽  
Sender Jankiel Miszputen ◽  
Maria Stella Figueiredo
Keyword(s):  
Ulcerative Colitis ◽  
Inflammatory Bowel Disease ◽  
Crohn’S Disease ◽  
Iron Deficiency ◽  
Crohn's Disease ◽  
Disease Activity ◽  
Bowel Disease ◽  
Activity Index ◽  
Deficiency Anemia ◽  
Inflammatory Bowel

CONTEXT AND OBJECTIVES:Anemia is the most frequent extraintestinal complication of inflammatory bowel disease. This study aimed to: 1) determine the prevalence of anemia among patients with inflammatory bowel disease; 2) investigate whether routine laboratory markers are useful for diagnosing anemia; and 3) evaluate whether any association exists between anemia and clinical/laboratory variables.DESIGN AND SETTING:Cross-sectional at a federal university.METHODS:44 outpatients with Crohn's disease and 55 with ulcerative colitis were evaluated. Clinical variables (disease activity index, location of disease and pharmacological treatment) and laboratory variables (blood count, iron laboratory, vitamin B12 and folic acid) were investigated.RESULTS:Anemia and/or iron laboratory disorders were present in 75% of the patients with Crohn's disease and in 78.2% with ulcerative colitis. Anemia was observed in 20.5% of the patients with Crohn's disease and in 23.6% with ulcerative colitis. Iron-deficiency anemia was highly prevalent in patients with Crohn's disease (69.6%) and ulcerative colitis (76.7%). Anemia of chronic disease in combination with iron deficiency anemia was present in 3% of the patients with Crohn's disease and in 7% of the patients with ulcerative colitis. There was no association between anemia and disease location. In ulcerative colitis, anemia was associated with the disease activity index.CONCLUSIONS:Most patients present iron laboratory disorders, with or without anemia, mainly due to iron deficiency. The differential diagnosis between the two most prevalent types of anemia was made based on clinical data and routine laboratory tests. In ulcerative colitis, anemia was associated with the disease activity index.

scholarly journals Pilot study: duodenal MDR1 and COX2 gene expression in cats with inflammatory bowel disease and low-grade alimentary lymphoma

2017 ◽  
Vol 20 (8) ◽  
pp. 759-766 ◽  
Author(s):  
Jorge Castro-López ◽  
Mariana Teles ◽  
Camino Fierro ◽  
Karin Allenspach ◽  
Marta Planellas ◽  
...  
Keyword(s):  
Gene Expression ◽  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Activity Index ◽  
Clinical Signs ◽  
Control Group ◽  
Low Grade ◽  
Mrna Levels ◽  
Chronic Enteropathy ◽  
Inflammatory Bowel

Objectives Multidrug resistance 1 (MDR1) encodes a protein called P-glycoprotein (P-gp), which serves as an efflux pump membrane protein implicated in intestinal homeostasis and drug resistance. Cyclooxygenase-2 (COX2) is a key enzyme in the synthesis of proinflammatory prostaglandins, tumourigenesis and in mucosal defence. Despite the importance of MDR1 and COX2, changes in their mRNA levels have not been studied in cats with inflammatory bowel disease (IBD) and low-grade alimentary lymphoma (LGAL). The present study aimed to determine the mRNA levels of MDR1 and COX2 in cats with IBD and LGAL, and to evaluate their correlation with clinical signs, histological severity and between genes. Methods Cats diagnosed with IBD (n = 20) and LGAL (n = 9) between 2008 and 2015 were included in the current study. Three healthy animals composed the healthy control cats group in which endoscopy was performed immediately before the ovariohysterectomy. All duodenal biopsy samples were obtained by endoscopy. Feline chronic enteropathy activity index was calculated for all cases. IBD histopathology was classified according to severity. MDR1 and COX2 mRNA levels were determined by absolute reverse transcriptase-quantitative real-time PCR. Results Statistically significant differences were observed for MDR1 and COX2 mRNA levels between the IBD and LGAL groups. No correlations were observed between molecular gene expression, feline chronic enteropathy activity index and histological grading for IBD, and between MDR1 and COX2 genes. However, a positive statistically significant correlation was observed between MDR1 and COX2 expression in the duodenum of cats. Conclusions and relevance MDR1 and COX2 gene expression is increased in cats with LGAL compared with cats with IBD. The control group tended to have lower values than both diseased groups. These results suggest that these genes may be involved in the pathogenesis of IBD or LGAL in cats.

scholarly journals Phenotypic Variation in Paediatric Inflammatory Bowel Disease by Age: A Multicentre Prospective Inception Cohort Study of the Canadian Children IBD Network

2019 ◽  
Vol 14 (4) ◽  
pp. 445-454 ◽  
Author(s):  
J Dhaliwal ◽  
T D Walters ◽  
D R Mack ◽  
H Q Huynh ◽  
K Jacobson ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Inflammatory Bowel Disease ◽  
Cohort Study ◽  
Disease Activity ◽  
Bowel Disease ◽  
Activity Index ◽  
Age At Diagnosis ◽  
Inception Cohort ◽  
Inflammatory Bowel ◽  
Ileal Disease

Abstract Background and Aims Incidence of paediatric inflammatory bowel disease [IBD] in Canada is among the highest worldwide, and age of onset may be decreasing. In a multicentre nationwide inception cohort study, we examined variation in phenotype of IBD throughout the paediatric age spectrum. Methods Children aged ≥2 years [y] and &lt;17y [A1 age at diagnosis], with new onset IBD, were systematically evaluated at sites of the Canadian Children IBD Network. Prospectively recorded phenotypic data were compared between age groups. Results Among 1092 children (70% Caucasian; 64% Crohn’s disease [CD], 36% ulcerative colitis/inflammatory bowel disease unclassified [UC/IBD-U]; median age 13 y, interquartile range [IQR] 11–15 y), 210 [19%] were diagnosed before the age of age 10 y [Paris A1a] and 43 [4%] before age 6 y (very-early-onset [VEO-IBD]). CD was less common in younger children [42%, 56%, 66%, respectively, of VEO-IBD, A1a; A1b]. Colon-only IBD [UC/IBDU or CD-colon] was present in 81% of VEO-IBD and 65% of A1a; ileal disease increased progressively, reaching plateau at age 10 y. CD location was ileocolonic [L3] in 53% overall. Ileitis [L1] increased with age [6% of VEO-IBD; 13% of A1a; 21% of A1b], as did stricturing/penetrating CD [4% of A1a; 11% of A1b]. At all ages UC was extensive [E3/E4] in &gt;85%, and disease activity moderate to severe according to Physician’s Global Assessment [PGA] and weighted Paediatric Crohn’s Disease Activity Index/Paediatric Ulcerative Colitis Activity Index [wPCDAI/PUCAI] in &gt;70%. Heights were modestly reduced in CD [mean height z score -0.30 ± 1.23], but normal in UC/IBD-U. Conclusions Paris classification of age at diagnosis is supported by age-related increases in ileal disease until age 10 years. Other phenotypic features, including severity, are similar across all ages. Linear growth is less impaired in CD than in historical cohorts, reflecting earlier diagnosis.

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