Is there an increased risk of intestinal and extraintestinal cancer in patients with crohn's disease? A population-based cohort followed from 1962 to 1997

Summary Background: There is an impression mostly from specialty clinics that patients with inflammatory bowel disease (IBD) have an increased risk of venous thromboembolic disorders. Our aim was to determine the incidence of deep venous thrombosis (DVT) and pulmonary embolism (PE) from a population-based database of IBD patients and, to compare the incidence rates to that of an age, gender and geographically matched population control group. Methods: IBD patients identified from the administrative claims data of the universal provincial insurance plan of Manitoba were matched 1:10 to randomly selected members of the general population without IBD by year, age, gender, and postal area of residence using Manitoba Health’s population registry. The incidence of hospitalization for DVT and PE was calculated from hospital discharge abstracts using ICD-9-CM codes 451.1, 453.x for DVT and 415.1x for PE. Rates were calculated based on person-years of follow-up for 1984-1997. Comparisons to the population cohort yielded age-adjusted incidence rate ratios (IRR). Rates were calculated based on person-years of follow-up (Crohn’s disease = 21,340, ulcerative colitis = 19,665) for 1984-1997. Results: In Crohn’s disease the incidence rate of DVT was 31.4/10,000 person-years and of PE was 10.3/10,000 person-years. In ulcerative colitis the incidence rates were 30.0/10,000 person-years for DVT and 19.8/10,000 person-years for PE. The IRR was 4.7 (95% CI, 3.5-6.3) for DVT and 2.9 (1.8-4.7) for PE in Crohn’s disease and 2.8 (2.1-3.7) for DVT and 3.6 (2.5-5.2) for PE, in ulcerative colitis. There were no gender differences for IRR. The highest rates of DVT and PE were seen among patients over 60 years old; however the highest IRR for these events were among patients less than 40 years. Conclusion: IBD patients have a threefold increased risk of developing DVT or PE.

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Incident Crohn’s Disease as a Risk Factor for Colorectal Cancer in the First 10 Years after Diagnosis: A Nationwide Population-Based Study

Journal of Clinical Medicine ◽

10.3390/jcm10204663 ◽

2021 ◽

Vol 10 (20) ◽

pp. 4663

Author(s):

Hyunil Kim ◽

Ji Hoon Kim ◽

Jung Kuk Lee ◽

Dae Ryong Kang ◽

Su Young Kim ◽

...

Keyword(s):

Colorectal Cancer ◽

Crohn’S Disease ◽

Crohn's Disease ◽

Early Onset ◽

Late Onset ◽

Age Groups ◽

Population Based ◽

Hazard Ratios ◽

Increased Risk ◽

Cox Proportional Hazard Regression

We investigated the risk of colorectal cancer (CRC) in patients with Crohn’s disease (CD) using the claims data of the Korean National Health Insurance during 2006–2015. The data of 13,739 and 40,495 individuals with and without CD, respectively, were analyzed. Hazard ratios (HRs) were calculated using multivariate Cox proportional hazard regression tests. CRC developed in 25 patients (0.18%) and 42 patients (0.1%) of the CD and non-CD groups, respectively. The HR of CRC in the CD group was 2.07 (95% confidence interval (CI), 1.25–3.41). The HRs of CRC among men and women were 2.02 (95% CI 1.06–3.87) and 2.10 (95% CI, 0.96–4.62), respectively. The HRs of CRC in the age groups 0–19, 20–39, 40–59, and ≥60 years were 0.07, 4.86, 2.32, and 0.66, respectively. The HR of patients with late-onset CD (≥40 years) was significantly higher than that of those with early-onset CD (<40 years). CD patients were highly likely to develop CRC. Early-onset CD patients were significantly associated with an increased risk of CRC than matched individuals without CD. However, among CD patients, late-onset CD was significantly associated with an increased risk of CRC.

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OP14 Risk of colorectal cancer diagnosis and colorectal cancer mortality in Crohn’s disease: A Scandinavian population-based cohort study

Journal of Crohn s and Colitis ◽

10.1093/ecco-jcc/jjz203.013 ◽

2020 ◽

Vol 14 (Supplement_1) ◽

pp. S013-S014

Author(s):

O Olen ◽

R Erichsen ◽

M C Sachs ◽

L Pedersen ◽

J Halfvarson ◽

...

Keyword(s):

Colorectal Cancer ◽

Cohort Study ◽

Crohn’S Disease ◽

Crohn's Disease ◽

General Population ◽

Cox Regression ◽

Population Based ◽

Tumour Stage ◽

Increased Risk

Abstract Background Crohn’s disease (CD) is a risk factor for colorectal cancer (CRC). Earlier studies reflect older treatment and surveillance strategies, and most have studied incident CRC without addressing potential lead-time and surveillance biases. Such bias can be reduced by examining tumour stage-adjusted CRC incidence and CRC mortality. We aimed to assess risks of CRC mortality and incident CRC among patients with CD compared with the general population. Methods Nationwide register-based cohort study during 1969–2017 of 47,035 patients with CD in Denmark (n = 13,056) and Sweden (n = 33,979), compared with 463,187 general population reference individuals, matched for sex, age, calendar year, and place of residence. We used Cox regression to estimate hazard ratios (HRs) for incident CRC and CRC mortality. In a multistate model, assessing competing events during follow-up (CRC diagnosis, CRC death, other death), we also took a tumour stage into account. Results During 1969–2017, 499 patients with CD developed CRC, corresponding to an adjusted HR of 1.40 [95% confidence interval (CI) 1.27–1.53]. We observed 296 (0.47/1000 person-years) deaths from CRC in patients with CD compared with 1968 (0.31/1000) in reference individuals [HR 1.74 (95% CI 1.54–1.96)]. CD patients diagnosed with CRC were at increased risk of CRC mortality compared with reference individuals also diagnosed with CRC [HR = 1.30 (95% CI 1.06–1.59)] and tumour stage at CRC diagnosis did not differ between groups (p = 0.27). CD patients who had 8 or more years of follow-up or who were diagnosed with primary sclerosing cholangitis (PSC) and hence were potentially eligible for CRC surveillance had an increased overall risk of CRC death [HR 1.41 (95% CI 1.18–1.69)] or CRC diagnosis [HR = 1.12 (95% CI = 0.98–1.28)]. However, in patients potentially eligible for CRC surveillance, we only found significantly increased risks in patients with CD onset <40 years, disease activity in the colon only, or with PSC (Figure 1). Conclusion CD patients are at increased risk of a CRC diagnosis and CRC death. Despite repeated colonoscopies during follow-up, CD patients are not diagnosed earlier (less severe tumour stage) with CRC than reference individuals. Nevertheless, CD patients with CRC have higher mortality than non-CD patients also diagnosed with CRC. CRC surveillance could likely be improved and should be focussed on CD patients <40 years at CD onset, patients with colon inflammation, and patients who have PSC.

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