Wealth was divided into income quartiles and other nSES variables were dichotomized into high versus low according to the median. Using administrative registers we assessed the associations between age- and sex-adjusted dementia incidence and neighborhood socioeconomic status (nSES) in 94 Danish municipalities. Underdetection of dementia in areas with low socioeconomic status (SES) may interfere with findings concerning associations between SES and dementia. Frequent healthcare system contacts by patients with IBD and detection bias may play a role in the association. UC and CD are associated with slightly increased all‐cause dementia risk, particularly frontotemporal dementia in CD patients. Dementia in IBD patients was associated with frequent healthcare system contacts. CD patients had an increased HR of all‐cause dementia (HR = 1.15 ) and frontotemporal dementia (HR = 2.70 ). UC patients had a slightly increased HR of all‐cause dementia (HR = 1.07 ) and Alzheimer's disease (HR = 1.10 ). The 40‐year CIP of all‐cause dementia was 7.2% for UC patients and 5.8% for CD patients. Of 88,985 patients with IBD (69.6% with ulcerative colitis, 30.4% with Crohn's disease ) and 884,108 comparisons, 2076 patients (78.1% with UC) and 23,011 comparisons (76.6% UC comparisons) developed dementia. In a nested case–control analysis, we investigated the impact of IBD severity, steroid use, colorectal and small bowel surgery, and healthcare system contacts on dementia risk. We calculated cumulative incidence proportions (CIPs) of dementia treating death as a competing risk, and adjusted hazard ratios (HRs) comparing IBD patients with matched comparisons.

We conducted a nationwide population‐based cohort study in Denmark (1977–2018) including all patients with incident IBD matched with up to 10 general population comparators without IBD by sex, year of birth and region of residence. To investigate dementia risk in patients with IBD Inflammatory bowel disease (IBD) may be associated with increased dementia risk, but the literature is conflicting.

Icd 10 code for dementia