scholarly journals Second Primary Malignancies in Patients with Pancreatic Neuroendocrine Neoplasms: A Population-Based Study on Occurrence, Risk Factors, and Prognosis

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Tulan Hu ◽  
Wei Wang ◽  
Chiyi He
Keyword(s):  
Risk Factors ◽  
Cox Regression ◽  
Latency Period ◽  
Population Based ◽  
Neuroendocrine Neoplasms ◽  
Second Primary ◽  
Cox Regression Analysis ◽  
Pancreatic Neuroendocrine Neoplasms ◽  
Using Data ◽  
Second Primary Malignancies

Background. This study aimed to evaluate the risk factors of developing second primary malignancies (SPMs) among patients with pancreatic neuroendocrine neoplasms (pNENs) and the prognosis of pNENs patients with SPMs (pSPMs) using data from the Surveillance, Epidemiology, and End Results (SEER) database. Methods. Data from patients diagnosed with pNENs between 1988 and 2016 were extracted. A case-control study was conducted to investigate the risk factors of developing SPMs among patients with pNENs. Meanwhile, cox regression analysis was also conducted to obtain the independent prognostic factors in pSPMs. Results. Of 7,630 patients with pNENs, 326 developed SPMs. Patients with pNENs who had not undergone surgery and had been diagnosed in recent periods had a higher risk of developing SPMs. The following independent prognostic predictors for pSPMs were identified: age, latency period, SEER stage, radiotherapy, and surgery. Conclusions. These findings may improve the surveillance of risk factors for developing SPMs in patients with pNENs and the prognostic risk factors in pSPMs.

scholarly journals Clinical characteristics and overall survival nomogram of second primary malignancies after prostate cancer, a SEER population-based study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yi Liu ◽  
Peipei Zhang ◽  
Yinghao Zhang ◽  
Lichuan Zheng ◽  
Wenbo Xu ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Overall Survival ◽  
Cox Regression ◽  
Characteristic Curve ◽  
Clinical Information ◽  
Population Based ◽  
Second Primary ◽  
Cox Regression Analysis ◽  
Validation Set ◽  
Second Primary Malignancies

AbstractProstate cancer (PCa) is the most prevalent cancer among males and the survival period of PCa has been significantly extended. However, the probability of suffering from second primary malignancies (SPMs) has also increased. Therefore, we downloaded SPM samples from the SEER database and then retrospectively analyzed the general characteristics of 34,891 PCa patients diagnosed between 2000 and 2016. After excluding cases with unknown clinical information, 2203 patients were used to construct and validate the overall survival (OS) nomogram of SPM patients after PCa. We found that approximately 3.69% of PCa patients were subsequently diagnosed with SPMs. In addition, the three most prevalent sites of SPM were respiratory and intrathoracic organs, skin, and hematopoietic system. The top three histological types of SPMs were squamous cell carcinoma, adenoma and adenocarcinoma, nevi and melanoma. Through univariate and multivariate Cox regression analysis, we found that the site of SPM, age, TNM stage, SPM surgery history, and PCa stage were associated with the OS of SPM. By virtue of these factors, we constructed a nomogram to predict the OS of SPM. The C-index in the training set and validation set were 0.824 (95CI, 0.806–0.842) and 0.862 (95CI, 0.840–0.884), respectively. Furthermore, we plotted the receiver operating characteristic curve (ROC) and the area under curve (AUC) which showed that our model performed well in assessing the 3-year (0.861 and 0.887) and 5-year (0.837 and 0.842) OS of SPMs in the training and validation set. In summary, we investigated the general characteristics of SPMs and constructed a nomogram to predict the prognosis of SPM following PCa.

scholarly journals Role of Disease Modifying Treatment in the Risk of Alloimmunization in Transfused Patients with Myelodysplastic Syndromes: A Population-Based Study

Blood ◽  
2019 ◽  
Vol 134 (Supplement_1) ◽  
pp. 4253-4253
Author(s):  
Hanne Rozema ◽  
Robby Kibbelaar ◽  
Nic Veeger ◽  
Mels Hoogendoorn ◽  
Eric van Roon
Keyword(s):  
Risk Factors ◽  
Regression Analysis ◽  
Cox Regression ◽  
Population Based ◽  
Incidence Rates ◽  
Blood Products ◽  
Cox Regression Analysis ◽  
In The Beginning ◽  
Observation Period

The majority of patients with myelodysplastic syndromes (MDS) require regular red blood cell (RBC) transfusions. Alloimmunization (AI) against blood products is an adverse event, causing time-consuming RBC compatibility testing. The reported incidence of AI in MDS patients varies greatly. Even though different studies on AI in MDS patients have been performed, there are still knowledge gaps. Current literature has not yet fully identified the risk factors and dynamics of AI in individual patients, nor has the influence of disease modifying treatment (DMT) been explored. Therefore, we performed this study to evaluate the effect of DMT on AI. An observational, population-based study, using the HemoBase registry, was performed including all newly diagnosed MDS patients between 2005 and 2017 in Friesland, a province of the Netherlands. All available information about treatment and transfusions, including transfusion dates, types, and treatment regimens, was collected from the electronic health records and laboratory systems. Follow-up occurred through March 2019. For our patient cohort, blood products were matched for AB0 and RhD, and transfused per the 'type and screen' policy (i.e. electronic matching of blood group phenotype between patient and donor). After a positive antibody screening, antibody identification and Rh/K phenotyping was performed and subsequent blood products were (cross)matched accordingly. The observation period was counted from first transfusion until last transfusion or first AI event. Univariate analyses and cumulative frequency distributions were performed to study possible risk factors and dynamics of AI. DMT was defined as hypomethylating agents, lenalidomide, chemotherapy and monoclonal antibodies. The effect of DMT as a temporary risk period on the risk of AI was estimated with incidence rates, relative risks (RR) and hazard ratios (HR) using a cox regression analysis. Follow-up was limited to 24 months for the cox regression analysis to avoid possible bias by survival differences. Statistical analyses were performed using IBM SPSS 24 and SAS 9.4. Out of 292 MDS patients, 236 patients received transfusions and were included in this study, covering 463 years of follow-up. AI occurred in 24 patients (10%). AI occurred mostly in the beginning of the observation period: Eighteen patients (75%) were alloimmunized after receiving 20 units of RBCs, whereas 22 patients (92%) showed AI after 45 units of RBCs (Figure 1). We found no significant risk factors for AI in MDS patients at baseline. DMT was given to 67 patients (28%) during the observation period. Patients on DMT received more RBC transfusions than patients that did not receive DMT (median of 33 (range: 3-154) and 11 (range: 0-322) RBC units respectively, p<0,001). Four AI events (6%) occurred in patients on DMT and 20 AI events (12%) occurred in patients not on DMT. Cox regression analysis of the first 24 months of follow-up showed an HR of 0.30 (95% CI: 0.07-1.31; p=0.11). The incidence rates per 100 person-years were 3.19 and 5.92 respectively. The corresponding RR was 0.54 (95% CI: 0.16-1.48; p=0.26). Based on our results, we conclude that the incidence of AI in an unselected, real world MDS population receiving RBC transfusions is 10% and predominantly occurred in the beginning of follow-up. Risk factors for AI at baseline could not be identified. Our data showed that patients on DMT received significantly more RBC transfusions but were less susceptible to AI. Therefore, extensive matching of blood products may not be necessary for patients on DMT. Larger studies are needed to confirm the protective effect of DMT on AI. Disclosures Rozema: Celgene: Other: Financial support for visiting MDS Foundation conference.

Risk factors for development of second primary malignancies (SPM) after autologous stem cell transplant (ASCT) for multiple myeloma.

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 8038-8038
Author(s):  
Amrita Y. Krishnan ◽  
Matthew Mei ◽  
Canlan Sun ◽  
Jennifer Berano-Teh ◽  
Stephen J. Forman ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cumulative Incidence ◽  
Cox Regression ◽  
Older Age ◽  
Second Primary ◽  
Cell Transplant ◽  
Cox Regression Analysis ◽  
Therapeutic Decisions ◽  
Increased Risk ◽  
Autologous Hct

8038 Background: Studies from the CALGB and IFM have suggested an increased incidence of SPM post ASCT in patients on lenalidomide maintenance. Patients with MM as well as patients post ASCT are inherently at higher risk of SPM. Therefore, assessment of risk factors associated with SPM would be useful in therapeutic decisions re preASCT therapy and post ASCTmaintenance. Methods: We conducted a retrospective cohort study of 841 consecutive MM patients who underwent at least one ASCT at City of Hope from 1989 to 2009. Sixty cases with 70 SPMs were identified. A nested case-control study was also conducted to understand the role of therapeutic exposures associated with SPMs. Controls were MM patients post ASCT matched by year of HCT (±5 years). Results: The median length of follow up was 3.3 yrs. (range 0.3-19.9). Median age at ASCT was 56 yrs (range 18-77). 62% had received a single autologous HCT, 27% tandem autologous HCT, 11% had received multiple HCTs (72 had a second allogeneic HCT)). The overall cumulative incidence of any SPM was 7.4% at 5 years and 15.9% at 10 years; the cumulative incidence of SPMs for patients >55 years approached 21.9% at 10 years. The cumulative incidence of MDS/AML was 1.8% and of solid tumors was 13.0%. Factors examined included age, race, sex, number and individual therapeutic exposures ( pre-ASCT, conditioning, and post-ASCT), disease status at ASCT. Multivariate Cox regression analysis revealed non-Hispanic whites (RR=2.4, 95% CI, 1.2-4.6, p=0.01) and older age (>55) at diagnosis of MM (RR=2.3, 95% CI, 1.3-4.1, p=0.004) to be associated with an increased risk of developing SPMs. Only cumulative thalidomide exposure (both pre-ASCT and post-ASCT) demonstrated a trend toward a positive association (OR=3.5, 95% CI, 0.6-19.4, p=0.15). Six patients (3 cases and 3 controls) were exposed to lenalidomide prior to development of SPM (OR=1.0, 95% CI, 0.14-7.10). Conclusions: This single institution analysis identified non-hispanic whites and older age to be associated with increased risk of developing SPM in pts post ASCT for MM. The trend towards increased risk with thalidomide exposure may be suggestive of a class effect from IMIDs that is not restricted to lenalidomide alone.

scholarly journals Risk Factors for the Morbidity and Prognosis of Lung Metastases in Newly Diagnosed Ovarian Carcinoma: A Large Population-based Study

2021 ◽  
Author(s):  
Shuning Ding ◽  
Kaibo Guo ◽  
Linqin Wu ◽  
Dongxu Li ◽  
Peipei Wang ◽  
...  
Keyword(s):  
Risk Factors ◽  
Logistic Regression ◽  
Regression Analysis ◽  
Ovarian Carcinoma ◽  
Cox Regression ◽  
Lung Metastases ◽  
Population Based ◽  
Ca 125 ◽  
Newly Diagnosed ◽  
Cox Regression Analysis

Abstract Background: To evaluate the risk factors for the morbidity and prognosis of lung metastases (LM) in patients with newly diagnosed ovarian carcinoma (OC). Methods: Based on the Surveillance, Epidemiology, and End Results (SEER) dataset, OC patients from 2010 and 2016 were retrospectively analyzed. Risk factors for the morbidity of LM in OC patients and their survival were assessed by logistic regression analysis and Kaplan-Meier and Gray method, respectively. Cox regression analysis was performed to identify risk factors for the prognosis of OC patients with LM, and their prognostic potentials were further validated by two established nomograms.Results: There are 27,123 eligible OC patients were enrolled in the study, with the morbidity of LM at 5.61% (1,521/27,123). Logistic regression models illustrated that T3 stage [odds ratio (OR)=2.74, 95%CI=2.09-3.66, P<0.01], advanced N stage (OR=1.86, 95%CI=1.62-2.14, P<0.01), and the prevalence of bone metastasis (OR=3.78, 95%CI=2.79-5.11, P<0.01), brain metastasis (OR=4.67, 95%CI=2.50-8.63, P<0.01) and liver metastasis (OR=3.60, 95%CI=3.14-4.12, P<0.01) were all significantly correlated with the morbidity of LM in OC patients. Median survival for OC patients with LM was 11 months (interquartile range, 3 to 25 months). Cox regression analyses illustrated over 80 years of age [hazard ratio (HR)=2.52, 95%CI=2.33-2.72, P<0.01] and positive expression of cancer antigen 125 (CA-125, HR=1.63, 95%CI=1.47-1.82, P<0.01) were significantly correlated with the high mortality of LM, while chemotherapy (HR=0.62, 95%CI=0.59-0.65, P<0.01) was significantly correlated with the low mortality. Two nomograms were established to examine the concordance index (C-index), calibration curves, the area under the curve (AUC), decision curve analyses (DCAs) and clinical impact curves (CICs), which validated the prognostic potentials of identified risk factors in OC patients with LM. Conclusion: The population-based cohort study provides references for guiding clinical screening and individualized treatment of OC patients with LM.

Competitive Testing of the WHO 2010 versus the WHO 2017 Grading of Pancreatic Neuroendocrine Neoplasms: Data from a Large International Cohort Study

2018 ◽  
Vol 107 (4) ◽  
pp. 375-386 ◽  
Author(s):  
Guido Rindi ◽  
Catherine Klersy ◽  
Luca Albarello ◽  
Eric Baudin ◽  
Antonio Bianchi ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Cox Regression ◽  
World Health ◽  
Neuroendocrine Neoplasms ◽  
Grading System ◽  
Cox Regression Analysis ◽  
Pancreatic Neuroendocrine Neoplasms ◽  
Grading Systems ◽  
Significant Difference ◽  
Explained Variation

Background: The World Health Organization (WHO) and the American Joint Cancer Committee (AJCC) modified the grading of pancreatic neuroendocrine neoplasms from a three-tier (WHO-AJCC 2010) to a four-tier system by introducing the novel category of NET G3 (WHO-AJCC 2017). Objectives: This study aims at validating the WHO-AJCC 2017 and identifying the most effective grading system. Method: A total of 2,102 patients were enrolled; entry criteria were: (i) patient underwent surgery; (ii) at least 2 years of follow-up; (iii) observation time up to 2015. Data from 34 variables were collected; grading was assessed and compared for efficacy by statistical means including Kaplan-Meier method, Cox regression analysis, Harrell’s C statistics, and Royston’s explained variation in univariable and multivariable analyses. Results: In descriptive analysis, the two grading systems demonstrated statistically significant differences for the major category sex but not for age groups. In Cox regression analysis, both grading systems showed statistically significant differences between grades for OS and EFS; however, no statistically significant difference was observed between the two G3 classes of WHO-AJCC 2017. In multivariable analysis for the two models fitted to compare efficacy, the two grading systems performed equally well with substantially similar optimal discrimination and well-explained variation for both OS and EFS. The WHO-AJCC 2017 grading system retained statistically significant difference between the two G3 classes for OS but not for EFS. Conclusions: The WHO-AJCC 2017 grading system is at least equally performing as the WHO-AJCC 2010 but allows the successful identification of the most aggressive PanNET subgroup. Grading is confirmed as probably the most powerful tool for predicting patient survival.

scholarly journals Incidence of pneumonia in nursing home residents in Germany: results of a claims data analysis

2018 ◽  
Vol 146 (9) ◽  
pp. 1123-1129 ◽  
Author(s):  
A. M. Fassmer ◽  
O. Spreckelsen ◽  
F. Hoffmann
Keyword(s):  
Cox Regression ◽  
Age Groups ◽  
Nursing Home Residents ◽  
The Elderly ◽  
Population Based ◽  
Insurance Fund ◽  
Cox Regression Analysis ◽  
Using Data ◽  
Claims Data Analysis ◽  
Incident Cases

AbstractPneumonia is one of the most common infectious diseases with a high mortality, especially in the elderly population. To date, there have been only a few population-based studies dealing with the incidence of pneumonia in nursing homes (NHs). We conducted a cohort study using data from a large German statutory health insurance fund. Between 2010 and 2014, 127 227 NH residents 65 years and older were analysed. For the calculation of incidences per 100 person-years (PY) and 95% confidence intervals (CIs), we assessed the first diagnosis of pneumonia during the time in NH. We compared the rates between sexes, age groups, care levels, and comorbidities and we performed a multivariate Cox regression analysis. The mean age in the cohort was 84.0 years (74.6% female). A total of 19 183 incident cases led to an overall 5-year-incidence of 11.8 per 100 PY (95% CI 11.7–12.0). The incidence in men was substantially higher than in women. Rates were highest in the first month after NH placement. Our study revealed that the incidence of pneumonia is high in German NH residents and especially in males. Due to demographic changes, pneumonia will likely be increasingly relevant in the health care of the elderly and institutionalised population.

scholarly journals Prognostic Factors, Survival Analyses and the Risk of Second Primary Cancer: A Population-Based Study on Burkitt Lymphoma/Leukemia

Diseases ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 43
Author(s):  
Ana M. Della Rocca ◽  
Fernanda S. Tonin ◽  
Mariana M. Fachi ◽  
Alexandre F. Cobre ◽  
Vinicius L. Ferreira ◽  
...  
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Burkitt Lymphoma ◽  
Cox Regression ◽  
Liver Tumors ◽  
Population Based ◽  
Second Primary ◽  
Population Based Study ◽  
Second Primary Cancers ◽  
Kaplan Meier

Burkitt lymphoma/leukemia (BL/L) is an aggressive oncohematological disease. This study evaluated the population-based prognosis and survival on BL/L as well as if BL/L behaved as a risk factor for the development of second primary cancers (SPCs) and if other first tumors behaved as risk factors for the occurrence of BL/L as an SPC. A retrospective cohort using the Surveillance, Epidemiology and End Results (SEER) Program (2008–2016) was performed. Kaplan–Meier, time-dependent covariate Cox regression and Poisson regression models were conducted. Overall, 3094 patients were included (median, 45 years; IQR, 22–62). The estimated overall survival was 65.4 months (95% CI, 63.6–67.3). Significantly more deaths occurred for older patients, black race, disease at an advanced stage, patients without chemotherapy/surgery and patients who underwent radiotherapy. Hodgkin lymphomas (nodal) (RR, 7.6 (3.9–15.0; p < 0.001)), Kaposi sarcomas (34.0 (16.8–68.9; p < 0.001)), liver tumors (3.4 (1.2–9.3; p = 0.020)) and trachea, mediastinum and other respiratory cancers (15.8 (2.2–113.9; p = 0.006)) behaved as risk factors for the occurrence of BL/L as an SPC. BL/L was a risk factor for the occurrence of SPCs as acute myeloid leukemias (4.6 (2.1–10.4; p < 0.001)), Hodgkin lymphomas (extranodal) (74.3 (10.0–549.8; p < 0.001)) and Kaposi sarcomas (35.1 (12.1–101.4; p < 0.001)). These results may assist the development of diagnostic and clinical recommendations for BL/L.

scholarly journals Comparison of risk factors for ischemic stroke and coronary events in a population-based cohort

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Iram Faqir Muhammad ◽  
Yan Borné ◽  
Suneela Zaigham ◽  
Martin Söderholm ◽  
Linda Johnson ◽  
...  
Keyword(s):  
Risk Factors ◽  
Ischemic Stroke ◽  
Inflammatory Markers ◽  
Cox Regression ◽  
Population Based ◽  
Cox Regression Analysis ◽  
Hazard Ratios ◽  
The Difference ◽  
Coronary Events ◽  
Traditional Risk Factors

Abstract Background Although coronary events (CE) and ischemic stroke share many risk factors, there are also some important differences. The aim of this paper was to assess the association of risk factors in relation to incident CE and ischemic stroke and to evaluate the heterogeneity in patterns of risk factors between the two outcomes. Method Traditional risk factors and inflammatory markers associated with coronary events and ischemic stroke were measured in the Malmö Diet and Cancer Cohort (MDCS, n = 26 519), where a total of 2270 incident ischemic stroke and 3087 incident CE occurred during a mean follow up time 19 ± 6 years, and in relation to inflammatory markers in the cardiovascular sub-cohort (MDC-CV, n = 4795). Cox regression analysis was used to obtain hazard ratios. A modified Lunn-McNeil competing risk analysis was conducted to assess the significance of any differences in risk profiles of these outcomes. Results Most cardiovascular risk factors were associated both with incident CE and ischemic stroke. However, current smoking, ApoB, low ApoA1, male sex and education level of ≤ 9 years of schooling were preferentially associated with CE compared to ischemic stroke. Conversely, age showed a stronger association with ischemic stroke than with CE. Conclusion CE and ischemic stroke have broadly similar risk factors profiles. However, there are some important differential associations, as well as substantial differences in the magnitude of the association. These could reflect the distinct biology of atherogenesis in different vascular beds. The difference in the determinants highlights the importance of looking at CE and ischemic stroke, two manifestations of cardiovascular disease, separately.

scholarly journals Risk of Aortic Aneurysm and Dissection in Patients with Tuberculosis: A Nationwide Population-Based Cohort Study

2021 ◽  
Vol 18 (21) ◽  
pp. 11075
Author(s):  
Ming-Tsung Chen ◽  
Chi-Hsiang Chung ◽  
Hung-Yen Ke ◽  
Chung-Kan Peng ◽  
Wu-Chien Chien ◽  
...  
Keyword(s):  
Cohort Study ◽  
Aortic Aneurysm ◽  
Cox Regression ◽  
Subsequent Development ◽  
Population Based ◽  
Chronic Inflammatory Disease ◽  
Cox Regression Analysis ◽  
Aortic Aneurysm And Dissection ◽  
Taiwan National Health Insurance ◽  
Using Data

Tuberculosis (TB) can cause chronic inflammation. The occurrence of aortic aneurysm (AA) and aortic dissection (AD) may be associated with chronic inflammatory disease, but whether TB increases the risk of AA and AD remains to be determined. This study aimed to investigate the association between TB and the development of AA and AD. We conducted a population-based cohort study using data obtained from the Taiwan National Health Insurance Database. We selected 31,220 individuals with TB and 62,440 individuals without TB by matching the cohorts according to age, sex, and index year at a ratio of 1:2. Cox regression analysis revealed that the TB cohort had a 1.711-fold higher risk of AA and AD than the non-TB cohort after adjustment for sex, age, socioeconomic status, and comorbidities (adjusted hazard ratio = 1.711; 95% confidence interval = 1.098–2.666). Patients with pulmonary, extrapulmonary, and miliary TB had a 1.561-, 1.892-, and 8.334-fold higher risk of AA and AD, respectively. Furthermore, patients with TB at <6 months, 6–12 months, and 1–5 years of follow-up had a 6.896-, 2.671-, and 2.371-fold risk of AA and AD, respectively. Physicians should consider the subsequent development of AA and AD while treating patients with TB.

Does Hospitalization Predict the Disease Course in Ulcerative Colitis? Prevalence and Predictors of Hospitalization and Re- Hospitalization in Ulcerative Colitis in a Population-based Inception Cohort (2000-2012)

2015 ◽  
Vol 24 (3) ◽  
pp. 287-292 ◽  
Author(s):  
Petra A. Golovics ◽  
Laszlo Lakatos ◽  
Michael D. Mandel ◽  
Barbara D. Lovasz ◽  
Zsuzsanna Vegh ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Cox Regression ◽  
Diagnostic Procedures ◽  
Population Based ◽  
Disease Course ◽  
Inception Cohort ◽  
Disease Extent ◽  
Cox Regression Analysis ◽  
Hospitalization Rates

Background & Aims: Limited data are available on the hospitalization rates in population-based studies. Since this is a very important outcome measure, the aim of this study was to analyze prospectively if early hospitalization is associated with the later disease course as well as to determine the prevalence and predictors of hospitalization and re-hospitalization in the population-based ulcerative colitis (UC) inception cohort in the Veszprem province database between 2000 and 2012. Methods: Data of 347 incident UC patients diagnosed between January 1, 2000 and December 31, 2010 were analyzed (M/F: 200/147, median age at diagnosis: 36, IQR: 26-50 years, follow-up duration: 7, IQR 4-10 years). Both in- and outpatient records were collected and comprehensively reviewed. Results: Probabilities of first UC-related hospitalization were 28.6%, 53.7% and 66.2% and of first re-hospitalization were 23.7%, 55.8% and 74.6% after 1-, 5- and 10- years of follow-up, respectively. Main UC-related causes for first hospitalization were diagnostic procedures (26.7%), disease activity (22.4%) or UC-related surgery (4.8%), but a significant percentage was unrelated to IBD (44.8%). In Kaplan-Meier and Cox-regression analysis disease extent at diagnosis (HR extensive: 1.79, p=0.02) or at last follow-up (HR: 1.56, p=0.001), need for steroids (HR: 1.98, p<0.001), azathioprine (HR: 1.55, p=0.038) and anti-TNF (HR: 2.28, p<0.001) were associated with the risk of UC-related hospitalization. Early hospitalization was not associated with a specific disease phenotype or outcome; however, 46.2% of all colectomies were performed in the year of diagnosis. Conclusion: Hospitalization and re-hospitalization rates were relatively high in this population-based UC cohort. Early hospitalization was not predictive for the later disease course.

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