Mental health risks rise before IBD diagnosis and persist for years

Clinical takeaway: Mental health assessment should be considered early in patients undergoing evaluation for inflammatory bowel disease, not just after diagnosis.

Depression and anxiety are well-recognized comorbidities of inflammatory bowel disease (IBD), but psychiatric symptoms may emerge well before IBD is formally diagnosed. A large Swedish study found that psychiatric risk began rising two to three years before diagnosis, peaked shortly afterward, and remained elevated a decade later.

Researchers compared more than 43,000 patients with IBD with nearly 179,000 matched individuals from the general population. The risk of any psychiatric disorder was 15% higher two years before IBD diagnosis and peaked at 50% higher within the first six months after diagnosis. Although the excess risk declined thereafter, it remained 19% higher at 10 years.

Over 10 years, the absolute excess translated to approximately one additional psychiatric disorder for every 31 patients with IBD. Major depressive disorder, anxiety disorders, and substance misuse accounted for much of the increased risk. Similar patterns were seen across Crohn’s disease, ulcerative colitis, and unclassified IBD.

The association also persisted when patients were compared with IBD-free full siblings, suggesting that shared genetics and early-life family environment do not fully explain the increased risk. Use of antidepressants and medications for anxiety, insomnia, or sedation also increased around the time of diagnosis and remained elevated five years later.

The findings support incorporating mental health assessment into IBD care during the diagnostic evaluation, with continued attention after diagnosis. Early recognition may be particularly important because depression and anxiety can complicate IBD management and have been associated with poorer disease outcomes and quality of life.

“It is time to actively manage psychiatric conditions in patients with IBD,” said lead author Jiangwei Sun, PhD, of the Department of Medical Epidemiology and Biostatistics at Karolinska Institutet in Stockholm, Sweden, and the Department of Epidemiology and Biostatistics at Sun Yat-sen University in Guangzhou, China.

Source: Sun J, et al. (2026 Aug 5) Clin Gastroenterol Hepatol. Psychiatric disorders before and after inflammatory bowel disease diagnosis: a nationwide cohort study in Sweden 2007-2023