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Mortality of Patients With Inflammatory Bowel Disease in the Faroe Islands From 1966-2020
Kári Rubek Nielsen1,2,3, Søren Nymand Lophaven4, Jóngerð Midjord1,3
1Medical Centre, National Hospital of the Faroe Islands, Tórshavn, Faroe Islands.
Background:
Increased mortality rates have been found in patients suffering from inflammatory bowel disease (IBD). The Faroe Islands have the highest occurrence of IBD, mainly ulcerative colitis (UC). This study investigated mortality of patients with IBD compared with the general Faroese population.
Methods:
All patients diagnosed with IBD from 1966-2020 were included, as well as population mortality data. All-cause and cause-specific mortality in the IBD cohort was compared with the population by standardized incidence ratios (SIRs). Risk factors for death within the cohort were assessed by hazard ratios (HRs) using Cox regression.
Results:
Overall mortality was not increased in patients with Crohn's disease (CD; SIR 0.9; 95% confidence interval [CI], 0.56-1.35) or UC (SIR 1.0; 95% CI, 0.83-1.25). However, patients with UC had an elevated risk of dying from digestive diseases (SIR 4.3; 95% CI, 2.16-7.74). Patients with IBD had lower risk of death of cardiovascular diseases compared with the background population (SIR 0.7; 95% CI, 0.50-0.93). Risk factors for mortality included male gender, age at diagnosis, and use of steroids. Protective factors were use of 5-aminosalicylic acid (5-ASA), thiopurines, and biological treatment.
Conclusions:
No increased risk of all-cause mortality in patients with CD or UC was found in this nationwide study compared with the entire Faroese population over more than 5 decades. The risk of death due to digestive diseases was, however, increased in patients with UC, while mortality risk of cardiovascular diseases was lower in patients with IBD.
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