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Summary: Background: Few population‐based studies have investigated the prevalence and disease course of perianal manifestation in Crohn's disease. Aims: To analyse the prevalence and outcomes of perianal Crohn's disease including medical therapies and need for perianal surgery, over different therapeutic eras based on the time of diagnosis; cohort A (1977–1995), cohort B (1996–2008), and cohort C (2009–2018) Methods: Patient inclusion lasted between 1977 and 2018. We followed patients prospectively, and regularly reviewed both in‐hospital and outpatient records. We defined a perianal surgical procedure as any perianal incision and excision, fistulotomy, or abscess drainage. Results: We included 946 incident patients. Perianal disease at diagnosis was present in 17.4% (n = 165) of the total cohort, with a declining prevalence in cohorts A/B/C, respectively (24.7%/18.5%/13.2%; p = 0.001). By the end of follow‐up, an additional 9.3% (n = 88) of the total cohort developed perianal disease. Cumulative immunosuppressive and biologic exposure increased over time; biologic use was higher in patients with perianal disease [pLog Rank < 0.001]. The overall rate of perianal surgery was 44.7% (113/253), with a probability of 28.3% (95% CI: 25.4–31.2) after 10 years, 41.0% (95% CI: 37.5–44.5) after 20 years, and 64.1% (95% CI: 59–69.2) after 30 years. There was no statistically significant difference in the probability of first perianal surgery among cohorts A/B/C [Log Rank = 0.594]. Conclusions: The burden of perianal disease and perianal surgery rates were high in this cohort. Therapeutic strategy was accelerated in patients with perianal Crohn's over time with higher exposure to immunosuppressives and biologics. Surgical management of perianal disease remained unchanged amongst the cohorts. [ABSTRACT FROM AUTHOR]

Background and Aims Few populaion-based studies have investigated the long-term colectomy rates of ulcerative colitis [UC]. We aimed to assess the colectomy rates over 40 years of different therapeutic eras in a prospective population-based inception cohort from Veszprem Province, Western Hungary. Methods Patient inclusion lasted between January1, 1977, and December31, 2018. Patient follow-up ended December 31, 2020. Colectomy rates and disease course were examined in three different eras based on the time of UC diagnosis; cohort A [1977–1995], cohort B [1996–2008], and cohort C [2009–2018]. Results A total of 1370 incident UC patients were included [male 51.2%, median age at diagnosis 37 years]. Median follow-up was 17 years (interquartile range [IQR] 9–24); 87 patients [6.4%] underwent colectomy. The cumulative probability of colectomy in the total population was 2.6% (95% confidence interval [CI] 2.2-3.0), 4.2% [95% CI 3.6-4.8], 7.0% [95% CI 6.2-7.8], and 10.4% [95% CI 9.1-11.7] after 5, 10, 20, and 30 years, respectively. The proportion of extensive colitis at diagnosis increased over time [24.2%/24.3%/34.9% in cohorts A/B/C, respectively, p  = 0.001]. Overall exposure to immunomodulators [11.3%/20.9%/34.4% in cohorts A/B/C, respectively, p  <0.001], as well as the probability for biologic therapy initiation increased over time (0%/3.3% [95% CI 2.6-4.0]/13.9% [95% CI 12.1-15.7], p  <0.001). There were no statistically significant differences in the cumulative probability of colectomies between cohorts A/B/C: 1.7% [95% CI 1.0-2.4], 2.5% [95% CI 1.9-3.1], and 3.7% [95% CI 2.7-4.7] after 5 years; 3.5% [95% CI 2.5-4.5], 4.2% [95% CI 3.4-5.0], and 4.5% [95% CI 3.3-5.7] after 10 years; and 7.5% [95% CI 6.1-8.9] and 6.3% [95% CI 5.2-7.4] in cohorts A/B after 20 years [log-rank = 0.588]. Extensive colitis (hazard ratio [HR] 2.24, 95% CI 1.55-3.23) and continuous active disease activity [HR 6.36, 95% CI 3.46-11.67] were independent predictors for colectomy. Conclusion No differences in colectomy rates have been observed in the incident UC patients over 40 years despite increasing use of immunomodulators and biologic therapies. [ABSTRACT FROM AUTHOR]

Background and Aims The number of population-based studies in ulcerative colitis [UC] from Eastern Europe is limited. Our aim here was to analyse the incidence, prevalence, disease phenotype, treatment strategy, disease course and colectomy rates in a prospective population-based inception cohort including UC patients diagnosed between 2007 and 2018. The present study is a continuation of the Veszprem IBD cohort since 1977. Methods In total, 467 UC patients were included [male/female: 236/231; median age at diagnosis: 36 years, IQR: 25–54 years]. Both in-hospital and outpatient records were collected and comprehensively reviewed. The mean length of follow-up was 8.34 ± 3.6 years. Demographic data were derived from the Hungarian Central Statistical Office. Results The mean incidence rate was 11.02/105 person-years in this 12-year period. Prevalence was 317.79/105 persons in 2015. Disease extent at diagnosis was proctitis [E1] in 22.3%, left-sided colitis [E2] in 43.9% and extensive colitis [E3] in 33.8%. The probability of disease extent progression was 11.6% [SE: 1.8] after 5 years. The distribution of maximal therapeutic steps was 5-ASA in 46.9%, corticosteroids in 16.3%, immunosuppressives in 19.3% and biologicals in 16.5%. The probability of receiving biological therapy after diagnosis was 9.9% [SE: 1.4] at 3 years. The overall colectomy rate was 4.1% in the population. The probability of colectomy was 1.5% [SE: 0.6] at 1 year, 3.6% [SE: 0.9] at 5 years and 4.4% [SE: 1.0] at 10 years. Conclusions The incidence of UC was high in Hungary, similar to high-incidence areas in Western Europe. Treatment strategies are in line with the biological era. The probability of progressing to proximal disease, and the medium- and long-term colectomy rates were both lower compared with data from Western European centres. [ABSTRACT FROM AUTHOR]

Background and Aims The number of prospective population-based studies on Crohn's disease[CD] is still limited from Eastern Europe. The present study is a continuation of the Veszprem IBD cohort. Our aim was to analyse incidence, prevalence, disease phenotype, treatment strategy, disease course, and surgical outcomes in a prospective population-based inception cohort including CD patients diagnosed between 2007 and 2018. Methods A total of 421 consecutive inception patients were included [male/female:237/184; mean age at diagnosis: 33.3 ± 16.2years]. Both in-hospital and outpatient records were collected and comprehensively reviewed. Demographic data were derived from the Hungarian Central Statistical Office. Results Mean incidence rate was 9.9 [95% CI: 9.0-10.9]/105 person-years in this 12-year period. Prevalence rate was 236.8 [95% CI: 220.8-252.8] in 2015; 17.6% and 20.0% of the patients had stenosing[B2] and penetrating[B3] disease behavior at diagnosis,respectively. The probability of disease behaviour progression from luminal to B2/B3 phenotype was 14.7% (standard error [SE]: 2.2) at 5 years after diagnosis. Distribution of maximal therapeutic steps during the total follow-up (8.5 years [8.5y], standard deviation [SD]: 3.3) was 5-aminosalicylic acid [5-ASA] in 15.7%, corticosteroids in 14.3%, immunosuppressives in 42.5%, and biologic therapy in 26.2%. The probability of receiving biologictherapy after diagnosis was 20.9% [SE: 2.0] at 5 years. The probability of first resective surgery was 20.7% [SE: 2.0] at 1 year, 26.1% [SE: 2.2] at 5 years, and 30.7% [SE: 2.4] at 10 years. The perianal surgery rate was 31.3% among patients with perianal involvement. Conclusions The incidence of CD in Hungary was high, similar to high-incidence areas in Western Europe. Treatment strategies are reflecting the biologic era. Disease behaviour progression was lower, as well as long-term [10y] surgery rates decreasing compared with data from previous decades. [ABSTRACT FROM AUTHOR]

Objective. Patients with inflammatory bowel diseases (IBD) are considered to have an increased risk for venous thromboembolism (VTE). The aim of the present study was to analyze the incidence and risk factors of VTE in a population-based inception cohort in the Veszprem province database between 1977 and 2012. Material and methods. A total of 1708 incepted IBD patients were included (male/female: 879/829; CD (Crohn's disease): 648, age at onset: 29, interquartile range (IQR): 22-39; UC (ulcerative colitis): 1060, age at onset: 36, IQR: 26-50 years). Both in- and outpatient records were collected and comprehensively reviewed and followed up for a total of 21,369 patient-years. Results. Twenty-two VTE events were identified in 19 patients (6 events in 5 CD and 16 in 14 UC patients). The incidence rate of VTE in IBD was 1.03 per 1000 patient-years. The risk of VTE in UC was associated with extensive location (odds ratio (OR): 3.25, 95% confidence interval (CI): 1.13-9.35), presence of fulminant episode during the disease course (OR: 4.15, 95% CI: 1.28-13.5), smoking (OR: 3.46, 95% CI: 1.14-10.5), and need for steroids (OR: 2.97, 95% CI: 0.99-8.92). Conclusion. The incidence of VTE was lower than previously reported. The incidence was higher in males and in UC it was associated with extensive disease, fulminant episodes, corticosteroids-requiring disease and smoking, but not with age at onset. [ABSTRACT FROM AUTHOR]

Background & Aims: Since data is limited regarding the risk of colorectal cancer (CRC) in Crohn's disease (CD) patients who present with stenosing disease in the colon, this study was undertaken to assess CRC risk in such patients, using a population-based, Veszprem province database, which includes incidental patients diagnosed between January 1, 1977 and December 31, 2011. Methods: Data from 640 incidental CD patients were analyzed (M/F ratio: 321/319, age-at-diagnosis: 28 years (IQR: 22-38)). Both hospital and outpatient records were collected and comprehensively reviewed. Results: CRC was diagnosed in six CD patients during a follow-up of 7759 person-years. Sixty-two patients presented with colonic/ileocolonic disease and a stenotic lesion in the colon with a follow-up of 702 personyears (median:10.5, IQR:5-16years). Colorectal cancer developed in 6.5% (equaling 0.57/100person-years), the SIR (6.53, 95%CI:2.45-17.4) was increased with four patients observed versus 0.61 expected. In a Kaplan- Meier analysis, the probability of developing CRC was 5.5% and 7.5% after 5- and 10 years, respectively, versus 0.4% in patients with other phenotypes (HR:18.8, p<0.001). A sensitivity analysis included patients with stenosing colonic lesion at diagnosis or during follow-up (n=91, follow-up:1180 person-years,median:12, IQR: 6-17 years). The probability of developing CRC was 3.6% and 4.9% after 5- and 10 years, respectively. Conclusions: The risk of CRC in CD patients presenting with or developing a stenotic lesion in the colon is high even after a short disease duration, suggesting the need for careful surveillance. [ABSTRACT FROM AUTHOR]

Aim: To analyze the difference in disease course and need for surgery in patients with Crohn's disease (CD)., Methods: Data of 506 patients with incident CD were analyzed (age at diagnosis: 31.5 ± 13.8 years). Both hospital and outpatient records were collected prospectively with a complete clinical follow-up and comprehensively reviewed in the population-based Veszprem province database, which includes incident CD patients diagnosed between January 1, 1977 and December 31, 2008. Follow-up data were collected until December 31, 2009. All patients included had at least 1 year of follow-up available. Patients with indeterminate colitis at diagnosis were excluded from the analysis., Results: Overall, 73 patients (14.4%) required resective surgery within 1 year of diagnosis. Steroid exposure and need for biological therapy were lower in patients with early limited surgery (P < 0.001 and P = 0.09). In addition, surgery rates during follow-up in patients with and without early surgery differed significantly after matching on propensity scores (P < 0.001, HR = 0.23). The need for reoperation was also lower in patients with early limited resective surgery (P = 0.038, HR = 0.42) in a Kaplan-Meier and multivariate Cox regression (P = 0.04) analysis. However, this advantage was not observed after matching on propensity scores (P(Logrank) = 0.656, P(Breslow) = 0.498)., Conclusion: Long-term surgery rates and overall exposure to steroids and biological agents were lower in patients with early limited resective surgery, but reoperation rates did not differ.

Aim: To investigate the evolution of disease phenotype in adult and pediatric onset Crohn's disease (CD) populations, diagnosed between 1977 and 2008., Methods: Data of 506 incident CD patients were analyzed (age at diagnosis: 28.5 years, interquartile range: 22-38 years). Both in- and outpatient records were collected prospectively with a complete clinical follow-up and comprehensively reviewed in the population-based Veszprem province database, which included incident patients diagnosed between January 1, 1977 and December 31, 2008 in adult and pediatric onset CD populations. Disease phenotype according to the Montreal classification and long-term disease course was analysed according to the age at onset in time-dependent univariate and multivariate analysis., Results: Among this population-based cohort, seventy-four (12.8%) pediatric-onset CD patients were identified (diagnosed ≤ 17 years of age). There was no significant difference in the distribution of disease behavior between pediatric (B1: 62%, B2: 15%, B3: 23%) and adult-onset CD patients (B1: 56%, B2: 21%, B3: 23%) at diagnosis, or during follow-up. Overall, the probability of developing complicated disease behaviour was 49.7% and 61.3% in the pediatric and 55.1% and 62.4% in the adult onset patients after 5- and 10-years of follow-up. Similarly, time to change in disease behaviour from non stricturing, non penetrating (B1) to complicated, stricturing or penetrating (B2/B3) disease was not significantly different between pediatric and adult onset CD in a Kaplan-Meier analysis. Calendar year of diagnosis (P = 0.04), ileal location (P < 0.001), perianal disease (P < 0.001), smoking (P = 0.038) and need for steroids (P < 0.001) were associated with presence of, or progression to, complicated disease behavior at diagnosis and during follow-up. A change in disease location was observed in 8.9% of patients and it was associated with smoking status (P = 0.01), but not with age at diagnosis., Conclusion: Long-term evolution of disease behavior was not different in pediatric- and adult-onset CD patients in this population-based cohort but was associated to location, perianal disease and smoking status.