Abstract:
OBJECTIVE:Crohn's disease (CD) is associated with increased risk of small bowel cancer (SBC), but previous studies have been small. We aimed to examine the risk of incident SBC and death from SBC in patients with inflammatory bowel disease (IBD). DESIGN:In a binational, population-based cohort study from Sweden and Denmark of patients with IBD during 1969-2017 and matched reference individuals from the general population, we evaluated the risk of incident SBC and death from SBC. Cox regression was used to estimate adjusted hazard ratios (aHRs). RESULTS:We identified 161 896 individuals with IBD (CD: 47 370; UC: 97 515; unclassified IBD: 17 011). During follow-up, 237 cases of SBC were diagnosed in patients with IBD (CD: 24.4/100 000 person-years; UC: 5.88/100 000 person-years), compared with 640 cases in reference individuals (2.81/100 000 person-years and 3.32/100 000 person-years, respectively). This corresponded to one extra case of SBC in 385 patients with CD and one extra case in 500 patients with UC, followed up for 10 years. The aHR for incident SBC was 9.09 (95% CI 7.34 to 11.3) in CD and 1.85 (95% CI 1.43 to 2.39) in UC. Excluding the first year after an IBD diagnosis, the aHRs for incident SBC decreased to 4.96 in CD and 1.69 in UC. Among patients with CD, HRs were independently highest for recently diagnosed, childhood-onset, ileal and stricturing CD. The relative hazard of SBC-related death was increased in both patients with CD (aHR 6.59, 95% CI 4.74 to 9.15) and patients with UC (aHR 1.57; 95% CI 1.07 to 2.32). CONCLUSION:SBC and death from SBC were more common in patients with IBD, particularly among patients with CD, although absolute risks were low.
journal_name
Gutjournal_title
Gutauthors
Axelrad JE,Olén O,Sachs MC,Erichsen R,Pedersen L,Halfvarson J,Askling J,Ekbom A,Sørensen HT,Ludvigsson JFdoi
10.1136/gutjnl-2020-320945subject
Has Abstractpub_date
2021-02-01 00:00:00pages
297-308issue
2eissn
0017-5749issn
1468-3288pii
gutjnl-2020-320945journal_volume
70pub_type
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