scholarly journals The overall and sex- and age-group specific incidence rates of cancer in people with schizophrenia: a population-based cohort study

2020 ◽  
Vol 29 ◽  
Author(s):  
D. Pettersson ◽  
M. Gissler ◽  
J. Hällgren ◽  
U. Ösby ◽  
J. Westman ◽  
...  
Keyword(s):  
General Population ◽  
Population Based ◽  
Incidence Rates ◽  
Age Group ◽  
Calendar Time ◽  
Population Based Study ◽  
Risk Of Death ◽  
Increased Risk ◽  
Prevention Programmes ◽  
Cancer Types

Abstract Aims Decades of research show that people with schizophrenia have an increased risk of death from cancer; however, the relationship between schizophrenia and cancer incidence remains less clear. This population-based study investigates the incidence of seven common types of cancer among people with a hospital diagnosis of schizophrenia and accounting for the effects of age, sex and calendar time. Methods This population-based study used 1990–2013 data from three nationwide Swedish registries to calculate the incidence (in total, by age group and by sex) of any cancer and of lung, oesophageal, pancreatic, stomach, colon, (in men) prostate and (in women) breast cancer in 111 306 people with a hospital diagnosis of schizophrenia. The incidence in people with diagnosed schizophrenia was compared with the incidence in the general population. Risk estimates accounted for the effects of calendar time. Results In 1 424 829 person-years of follow-up, schizophrenia did not confer an overall higher cancer risk (IRR 1.02, 95% CI 0.91–1.13) but was associated with a higher risk for female breast (IRR 1.19, 95% CI 1.12–1.26), lung (IRR 1.42, 95% CI 1.28–1.58), oesophageal (IRR 1.25, 95% CI 1.07–1.46) and pancreatic (IRR 1.10, 95% CI 1.01–1.21) and a lower risk of prostate (IRR 0.66, 95% CI 0.55–0.79) cancer. Some age- and sex-specific differences in risk were observed. Conclusions People with schizophrenia do not have a higher overall incidence of cancer than people in the general population. However, there are significant differences in the risk of specific cancer types overall and by sex calling for efforts to develop disease-specific prevention programmes. In people with schizophrenia, higher risk generally occurs in those <75 years.

scholarly journals Assessing relative COVID-19 mortality during the second wave: a prospective Swiss population-based study

BMJ Open ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. e051164
Author(s):  
Sandra Siegfried ◽  
Matthias Bopp ◽  
Huldrych Günthard ◽  
Olivia Keiser ◽  
Caroline E Weibull ◽  
...  
Keyword(s):  
General Population ◽  
Proportional Hazards ◽  
Population Based ◽  
Secondary Outcome ◽  
Calendar Time ◽  
Population Based Study ◽  
Relative Mortality ◽  
Risk Of Death ◽  
Swiss Population ◽  
Second Wave

ObjectiveDuring the first COVID-19 wave in Switzerland, relative mortality was at least eight times higher compared with the uninfected general population. We aimed to assess sex-specific and age-specific relative mortality associated with a SARS-CoV-2 diagnosis during the second wave.DesignProspective population-based study.SettingIndividuals testing positive for SARS-CoV-2 after the start of the second wave on 1 October 2020 were followed up until death or administrative censoring on 31 December 2020.Participants5 179 740 inhabitants of Switzerland in fall 2018 aged 35–95 years (without COVID-19) and 257 288 persons tested positive for SARS-CoV-2 by PCR or antigen testing during the second wave.Primary and secondary outcome measuresThe planned outcome measure was time to death from any cause, measured from the date of a SARS-CoV-2 diagnosis or 1 October in the general population. Information on confirmed SARS-CoV-2 diagnoses and deaths was matched by calendar time with the all-cause mortality of the general Swiss population of 2018. Proportional hazards models were used to estimate sex-specific and age-specific mortality rates and probabilities of death within 60 days.ResultsThe risk of death for individuals tested positive for SARS-CoV-2 in the second wave in Switzerland increased at least sixfold compared with the general population. HRs, reflecting the risk attributable to a SARS-CoV-2 infection, were higher for men (1.40, 95% CI 1.29 to 1.52) and increased for each additional year of age (1.01, 95% CI 1.01 to 1.02). COVID-19 mortality was reduced by at least 20% compared with the first wave in spring 2020.ConclusionGeneral mortality patterns, increased for men and older persons, were similar in spring and in fall. Absolute and relative COVID-19 mortality was smaller in fall.Trial registrationThe protocol for this study was registered on 3 December 2020 at https://osf.io/gbd6r.

Mortality following new-onset Rheumatoid Arthritis: has modern Rheumatology had an impact?

2017 ◽  
Vol 77 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Marie Holmqvist ◽  
Lotta Ljung ◽  
Johan Askling
Keyword(s):  
Rheumatoid Arthritis ◽  
General Population ◽  
Excess Mortality ◽  
Disease Onset ◽  
Mortality Rates ◽  
Calendar Time ◽  
Risk Of Death ◽  
Quality Register ◽  
Increased Risk ◽  
New Onset

ObjectiveTo investigate if, and when, patients diagnosed with rheumatoid arthritis (RA) in recent years are at increased risk of death.MethodsUsing an extensive register linkage, we designed a population-based nationwide cohort study in Sweden. Patients with new-onset RA from the Swedish Rheumatology Quality Register, and individually matched comparators from the general population were followed with respect to death, as captured by the total population register.Results17 512 patients with new-onset RA between 1 January 1997 and 31 December 2014, and 78 847 matched general population comparator subjects were followed from RA diagnosis until death, emigration or 31 December 2015. There was a steady decrease in absolute mortality rates over calendar time, both in the RA cohort and in the general population. Although the relative risk of death in the RA cohort was not increased (HR=1.01, 95% CI 0.96 to 1.06), an excess mortality in the RA cohort was present 5 years after RA diagnosis (HR after 10 years since RA diagnosis=1.43 (95% CI 1.28 to 1.59)), across all calendar periods of RA diagnosis. Taking RA disease duration into account, there was no clear trend towards lower excess mortality for patients diagnosed more recently.ConclusionsDespite decreasing mortality rates, RA continues to be linked to an increased risk of death. Thus, despite advancements in RA management during recent years, increased efforts to prevent disease progression and comorbidity, from disease onset, are needed.

Risk of Stroke in Nasopharyngeal Cancer Survivors: A National Registry-Based Population Cohort Study

Neurology ◽  
2021 ◽  
pp. 10.1212/WNL.0000000000013058
Author(s):  
Teng Hwee Tan ◽  
Huili Zheng ◽  
Timothy Cheo ◽  
Jeremy Tey ◽  
Yu Yang Soon
Keyword(s):  
Cohort Study ◽  
General Population ◽  
Nasopharyngeal Cancer ◽  
Reference Population ◽  
National Registry ◽  
Age Group ◽  
Post Stroke ◽  
Risk Of Death ◽  
Increased Risk ◽  
Stage 1

BackgroundWe aim to determine the risk of stroke and death within 30 days post stroke in nasopharyngeal cancer (NPC) survivors.MethodsWe conducted a population-based cohort study of patients diagnosed with NPC from Jan 1, 2005 to Dec 31, 2017. Using the cancer and stroke disease registries and the Singapore general population as the reference population, we report the age-standardized incidence rate differences (SIRDs) ratios (SIRs) and the cumulative incidence of stroke and the standardized mortality rate differences (SMRDs) and ratios (SMRs) for all causes of death within 30 days post stroke for NPC survivors.FindingsAt a median follow up of 48.4 months (IQR 19.8 – 92.9) for 3849 patients diagnosed with NPC, 96 patients developed stroke. The overall SIRD and SIR for stroke was 3.12 (95% CI 2.09 – 4.15) and 2.54 (95% CI 2.08 – 3.10) respectively. The SIRD was highest for the age group 70 – 79 years old (8.84 cases per 1000 person-years (PY); 0.46 – 17.21) while the SIR was highest for the age group 30 – 39 years old (16.41; 6.01 – 35.82). The SIRD and SIR for stage 1 disease was (6.96 cases per 1000 PY; 2.16 – 11.77) and (4.15; 2.46 – 7.00) respectively. The SMRD and SMR for all cause deaths within 30 days of stroke was (3.20 cases per 100 persons; -3.87 – 10.28) and (1.34; 0.76 – 2.37) respectively.InterpretationThe overall risk of stroke was markedly elevated in survivors of NPC, especially in Stage 1 disease when compared to the general population. The risk of death within 30 days of stroke was not significantly higher for NPC survivors.Classification of EvidenceThis study provides Class II evidence of the increased risk of stroke in survivors of nasopharyngeal cancer compared to general population.

Conjugal multiple sclerosis in Isfahan, Iran: a population-based study

2007 ◽  
Vol 13 (5) ◽  
pp. 673-675 ◽  
Author(s):  
A.H. Maghzi ◽  
M. Etemadifar ◽  
V. Shaygannejad ◽  
M. Saadatnia ◽  
M. Salehi ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
General Population ◽  
Environmental Factors ◽  
Adult Life ◽  
Marital Relationship ◽  
Population Based ◽  
Rare Form ◽  
Population Based Study ◽  
Increased Risk ◽  
Estimated Risk

Conjugal multiple sclerosis (MS) is a rare form of MS in which both spouses are affected, and at least one is affected after marriage. Among 1606 definite MS patients, 1076 were in marital relationship, among whom we identified six conjugal pairs, giving the conjugal rate of 0.5%. This rate is 12.5 times higher than the estimated risk of MS for the general population (0.04%). The observed conjugal rate suggests an increased risk of developing MS for MS patients' spouses, this could be due to transmission or, more likely, to the same environmental factors shared in adult life. Multiple Sclerosis 2007; 13: 673-675. http://msj.sagepub.com

scholarly journals Increased Incidence and Impact of Upper and Lower Gastrointestinal Events in Patients with Rheumatoid Arthritis in Olmsted County, Minnesota: A Longitudinal Population-based Study

2012 ◽  
Vol 39 (7) ◽  
pp. 1355-1362 ◽  
Author(s):  
ELENA MYASOEDOVA ◽  
ERIC L. MATTESON ◽  
NICHOLAS J. TALLEY ◽  
CYNTHIA S. CROWSON
Keyword(s):  
Rheumatoid Arthritis ◽  
Rate Ratio ◽  
Population Based ◽  
Incidence Rates ◽  
Olmsted County ◽  
Calendar Time ◽  
Upper Gi ◽  
American College Of Rheumatology ◽  
Increased Risk ◽  
Incidence And Mortality

Objective.To assess the incidence and mortality impact of upper and lower gastrointestinal (GI) events in rheumatoid arthritis (RA) compared to non-RA subjects.Methods.We identified incident upper and lower GI events and estimated their incidence rates using person-year methods in a population-based incident RA cohort of residents of Olmsted County, Minnesota, USA (1987 American College of Rheumatology criteria first fulfilled between January 1, 1980, and January 1, 2008) and non-RA subjects from the same population.Results.The study included 813 patients with RA and 813 non-RA subjects (mean followup 10.3 and 10.8 yrs, respectively); 68% women; mean age 55.9 yrs in both cohorts. The rate of upper GI events/100 person-years was 2.9 in RA versus 1.7 in the non-RA cohort (rate ratio 1.7, 95% CI 1.4, 2.2); for lower GI events, the rates were 2.1 in RA versus 1.4 in the non-RA cohort (rate ratio 1.5, 95% CI 1.1, 1.9). The incidence of upper GI bleed, perforation, ulcer, obstruction, and any upper GI event in RA declined over calendar time; the incidence of lower GI events remained unchanged. Exposure to glucocorticoids, prior upper GI disease, abdominal surgery, and smoking were associated with lower GI events in RA. Both upper and lower GI events were associated with increased mortality risk in RA.Conclusion.There is increased risk of serious upper and lower GI events in RA compared to non-RA subjects, and increased GI-related mortality in RA. Prominent declines in incidence of upper, but not lower GI events in RA highlight the need for studies investigating lower GI disease in patients with RA.

scholarly journals A Population Based Study of the Incidence and Effect on Mortality of Venous Thromboembolism in Non-Hodgkins Lymphoma Patients in the Rituximab Era

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 2609-2609
Author(s):  
Aaron Rosenberg ◽  
Ann Brunson ◽  
Joseph Tuscano ◽  
Richard H. White ◽  
Ted Wun
Keyword(s):  
Venous Thromboembolism ◽  
Cumulative Incidence ◽  
Multivariable Analysis ◽  
Population Based ◽  
Population Based Study ◽  
Cox Models ◽  
Hodgkins Lymphoma ◽  
Risk Of Death ◽  
Increased Risk ◽  
Non Hodgkins Lymphoma

Abstract Background: Patients (pts) with non-Hodgkins lymphoma (NHL) are at increased risk of venous thromboembolism (VTE). We and others have demonstrated increased risk of death among NHL pts with incident VTE; however, these studies were largely conducted in the pre-rituximab era. We therefore analyzed a large cohort of NHL pts in the California Cancer Registry (CCR), determined the incidence of VTE, and evaluated its effect on survival in the rituximab era. Methods: Using the CCR linked with hospital discharge and emergency department records, we identified adult NHL pts diagnosed in 2005 – 2010, excluding cases ascertained via autopsy or death certificate, and those diagnosed with acute VTE in the 2 months preceding NHL diagnosis. VTE was defined by specific ICD-9-CM codes, and Elixhauser comorbidity score, excluding lymphoma, was calculated. Cumulative incidence was calculated using the Kaplan-Meier (KM) method. Adjusted hazard ratios (aHR) of VTE and death were estimated using Cox proportional hazard models, stratified by indolent vs aggressive NHL subtype, adjusting for age, race, stage, treatment, comorbidity and prior VTE. Analyses of VTE incidence treated death as a competing risk. Cox models for death incorporated VTE as a time-dependent covariate to account for immortal time bias. Results: NHL was identified in 18,424 pts. Most (n=12,963) had aggressive NHL (1,017 mantle cell, 11,246 diffuse large B-cell or follicular grade 3, 170 lymphoblastic, 530 Burkitt), while 5,461 had indolent NHL (2,809 follicular grade 1/2, 2,652 marginal zone). Median age was 64 years (yrs) and was similar in aggressive and indolent cohorts. Men accounted for 54% (n=9926) of cases, and were more common in aggressive compared to indolent NHL (7,317 (56%) vs 2,609 (48%) respectively). Most cases (62% n=11,451) were non-Hispanic White, 4% (n=795) were African American, 21% (n=3866) Hispanic, 11% Asian (n=2013) and 1.6% unknown (n=299). The ethnic distribution was similar in aggressive and indolent NHL. Median number of reported comorbid conditions was 2. Chemotherapy was initiated in 76% (n=9791) of aggressive NHL pts and 41% (n=2250) of indolent pts. The KM cumulative incidence of first time, acute VTE in NHL pts was 4.7% (95% CI 4.4 – 5.0) and 5.3% (95% CI 4.9- 5.6) at 1 and 2 years respectively. The incidence of VTE was higher in patients with aggressive versus indolent NHL (6.5% (95% CI 6.1 - 6.9) vs 2.3% (95% CI 2.0 - 2.8) at 2 yrs respectively P<0.001), and was highest during the first 6 months after dx (Figure). In multivariable analysis of aggressive lymphoma pts, the risk of VTE was higher among pts receiving chemotherapy (Ctx) [aHR 2.3, 95% CI (1.9 – 3.0)], lower in pts with stage II NHL [aHR 0.8, 95% CI (0.6 – 1.0)] while histological subtype of aggressive NHL was not a predictor. For indolent NHL, the risk of developing acute VTE was increased among cases that received Ctx [aHR 2.3, 95% CI (1.6 – 3.4)], and cases with follicular grade 1/2 [aHR 1.6, 95% CI (1.1 – 2.3)] whereas stage was not a significant risk factor. Five year overall survival for aggressive NHL was 55% (95% CI 46 – 56) and 80% (95% CI 69 – 82) for indolent NHL. In multivariable analysis risk of incident VTE after diagnosis of NHL dx was associated with an increased risk of death (Table). Interestingly, this effect was present for only the first 2 years after dx of aggressive NHL, while the effect persisted throughout follow-up for indolent NHL. Conclusions: This large, population based study, which captured essentially all patients diagnosed with NHL in California between 2005-2010, confirms prior reports of VTE incidence in NHL patients. Pts are at highest risk early in their course, and pts undergoing chemotherapy were at increased risk. Moreover, VTE subsequent to NHL diagnosis independently increases the risk of death adjusting for other important covariates. Whereas chemoimmunotherapy has negated the effect of some previous negative prognostic factors, the adverse effect of incident VTE persists in this recent cohort. Table:Association of VTE and Death* Aggressive NHL Indolent NHLTime from NHL dx to VTEaHR95% CIaHR95% CI0 – 6 months1.411.3 – 1.62.071.4 – 3.06 – 12 months1.401.1 – 1.82.591.4 – 4.712 – 24 months1.631.3 – 2.13.201.9 – 5.4>24 months0.940.7 – 1.22.371.6 – 3.6 *Cox models adjusted for Age, Sex, Race, Stage, Treatment, Prior VTE and Comorbidity Figure 1 Figure 1. Disclosures No relevant conflicts of interest to declare.

scholarly journals The Impact of Prior Malignancies on Second Malignancies and Survival in MM Patients: A Population-Based Study

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 3246-3246
Author(s):  
Gudbjorg Jonsdottir ◽  
Sigrún H. Lund ◽  
Magnus Björkholm ◽  
Ingemar Turesson ◽  
Anders Wahlin ◽  
...  
Keyword(s):  
Cancer Diagnosis ◽  
Hematological Malignancies ◽  
Cox Regression ◽  
Population Based ◽  
Second Malignancies ◽  
Advisory Committees ◽  
Population Based Study ◽  
Risk Of Death ◽  
Increased Risk ◽  
Prior Malignancy

Abstract Background Awareness of second malignancies in patients with multiple myeloma (MM) has been increasing during recent years. We have previously shown that second malignancies are associated with a decreased life expectancy in MM patients. Information regarding prior and second malignancies in MM is limited as these patients are often excluded from clinical trials and previously published results from other groups have been conflicting. In the present study we aimed to evaluate two hypotheses. Firstly we hypothesize that prior malignancy is a proxy for genetic instability that could be a risk factor for subsequent malignancy development in MM patients. There is limited data regarding this association in the literature and in two recent registry studies the results were inconclusive. Secondly, to further assess the clinical implication of prior malignancies in MM patients we assessed survival in these patients compared to MM patients without a history of prior malignancy. Patients and Methods All patients diagnosed with MM from January 1, 1973 to December 31, 2013 were identified from the Swedish Cancer Register. All prior and subsequent malignant diagnoses were identified through cross-linkage within the registry. A Cox regression model was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) where prior malignancy was compared in MM patients who developed a subsequent malignancy and MM patients who did not. In another Cox regression model, survival was compared in MM patients with and without a prior malignancy. The same method was used to estimate if there was a dose-dependent relationship, i.e. if an increasing number of prior malignancies was associated with a poorer outcome. Results A total of 22,359 patients were diagnosed with MM during the study period. Of these, 2,620 (12%) patients had one or more prior malignancy diagnosis at the time of MM diagnosis and 1,243 (6%) patients developed subsequent malignancies. Among the MM patients who developed a subsequent malignancy, 148 (12%) had a prior malignancy diagnosis. Hematological malignancies were 7% of prior malignancies and 17% of subsequent malignancies. MM patients with a prior malignancy diagnosis did not have increased risk of developing a subsequent malignancy compared to MM patients without a prior malignancy (HR 1.0, 95% CI 0.9-1.2). MM patients with a prior malignancy diagnosis had a statistically significant 10% increased risk of death (HR=1.1, 95% CI 1.1-1.2, p<0.001) compared to MM patients without a prior malignancy diagnosis. MM patients with 2 or more prior malignancy diagnoses had a 20% increased risk of death (HR=1.2, 95% CI 1.1-1.4, p=0.002) compared to MM patients without a prior malignancy diagnosis (Figure). Summary and Conclusions In our large population-based study we found that prior malignancy negatively impacts survival in MM patients and that more than one prior malignancy decreases survival even further. Interestingly, a prior malignancy did not increase the risk of developing a subsequent malignancy in MM patients. We confirmed prior reports of solid tumors being more common than hematological malignancies, both prior and subsequent to the MM diagnosis. A prior malignancy was associated with a reduced survival in MM patients without being a risk factor for subsequent malignancies. The underlying explanation for this is probably multifactorial, and could include reduced dose intensity of chemotherapy, complications from treatment, or that MM that develops after another malignancy might be biologically different. Given the increase of cancer survivors in general, our findings are of importance both for the individual patients and their families as well as for the treating physician. Figure Survival in MM patients without a prior cancer diagnosis compared to MM patients with one and two or more prior cancer diagnoses Figure. Survival in MM patients without a prior cancer diagnosis compared to MM patients with one and two or more prior cancer diagnoses Disclosures Landgren: Takeda: Membership on an entity's Board of Directors or advisory committees; Merck: Membership on an entity's Board of Directors or advisory committees; Medscape: Employment, Other: Chairman for Medscape Myeloma Program; Amgen: Speakers Bureau; Celgene: Speakers Bureau; BMS: Speakers Bureau.

scholarly journals Transformation and outcome of nodular lymphocyte predominant Hodgkin lymphoma: a Finnish Nationwide population-based study

2021 ◽  
Vol 11 (12) ◽  
Author(s):  
Ilja Kalashnikov ◽  
Tomas Tanskanen ◽  
Janne Pitkäniemi ◽  
Nea Malila ◽  
Sirkku Jyrkkiö ◽  
...  
Keyword(s):  
B Cell ◽  
Hodgkin Lymphoma ◽  
Relative Survival ◽  
B Cell Lymphoma ◽  
Population Based ◽  
Population Based Study ◽  
Entire Study ◽  
Risk Of Death ◽  
Increased Risk ◽  
Histological Transformation

AbstractNodular lymphocyte predominant Hodgkin lymphoma (NLPHL) is a rare B-cell malignancy associated with excellent survival. However, some patients experience histological transformation into aggressive large B-cell lymphoma. Population-based data on transformation in patients with NLPHL is limited. We conducted a nationwide population-based study to estimate the risk of transformation and relative survival in patients diagnosed with NLPHL in Finland between 1995 and 2018. We identified a total of 453 patients (median age, 48 years; 76% males) with the incident NLPHL from the Finnish Cancer Registry. The cumulative incidence of transformation was 6.3% (95% CI, 4.2-9.6) at 10 years. After adjusting for sex, age and year of diagnosis, transformation was associated with a substantially increased risk of death (HR 8.55, 95% CI 4.49−16.3). Ten-year relative survival was 94% (95% CI, 89%‒100%). The patients diagnosed at a later calendar year had lower excess risk of death (HR, 0.38 per 10-year increase; 95% CI, 0.15‒0.98). We conclude that while the 10-year relative survival for the patients with NLPHL was excellent in this large population-based cohort for the entire study period, transformation resulted in a substantially increased mortality compared with the patients without transformation. Our results also suggest a reduction in excess mortality over time.

scholarly journals Severe COVID-19 in inflammatory bowel disease patients in a population-based setting

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0258271
Author(s):  
Rob H. Creemers ◽  
Ashkan Rezazadeh Ardabili ◽  
Daisy M. Jonkers ◽  
Mathie P. G. Leers ◽  
Mariëlle J. Romberg-Camps ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
General Population ◽  
Incidence Rate ◽  
Bowel Disease ◽  
Clinical Course ◽  
Population Based ◽  
Incidence Rates ◽  
Systemic Medication ◽  
Increased Risk ◽  
Inflammatory Bowel

Objective Data on the course of severe COVID-19 in inflammatory bowel disease (IBD) patients remains limited. We aimed to determine the incidence rate and clinical course of severe COVID-19 in the heavily affected South-Limburg region in the Netherlands. Methods All COVID-19 patients admitted to the only two hospitals covering the whole South-Limburg region between February 27, 2020 and January 4, 2021 were included. Incidence rates for hospitalization due to COVID-19 were determined for the IBD (n = 4980) and general population (n = 597,184) in South-Limburg. Results During a follow-up of 4254 and 510,120 person-years, 20 IBD patients (0.40%; 11 ulcerative colitis (UC), 9 Crohn’s disease (CD)) and 1425 (0.24%) patients from the general population were hospitalized due to proven COVID-19 corresponding to an incidence rate of 4.7 (95% Confidence interval (CI) 3.0–7.1) and 2.8 (95% CI 2.6–2.9) per 1000 patient years, respectively (Incidence rate ratio: 1.68, 95% CI 1.08–2.62, p = 0.019). Median age (IBD: 63.0 (IQR 58.0–75.8) years vs. general population: 72.0 (IQR 62.0–80.0) years, p = 0.10) and mean BMI (IBD: 24.4 (SD 3.3) kg/m2 vs. general population 24.1 (SD 4.9) kg/m2, p = 0.79) at admission were comparable in both populations. As for course of severe COVID-19, similar rates of ICU admission (IBD: 12.5% vs. general population: 15.7%, p = 1.00), mechanical ventilation (6.3% vs. 11.2%, p = 1.00) and death were observed (6.3% vs. 21.8%, p = 0.22). Conclusion We found a statistically significant higher rate of hospitalization due to COVID-19 in IBD patients in a population-based setting in a heavily impacted Dutch region. This finding reflects previous research that showed IBD patients using systemic medication were at an increased risk of serious infection. However, although at an increased risk of hospitalization, clinical course of severe COVID-19 was comparable to hospitalized patients without IBD.

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