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Regulatory assessments of drug risks do not routinely consider patient preferences, despite evidence that some patients are willing to accept increased side-effect risk in exchange for therapeutic benefits. The aim of this study is to estimate the willingness of Crohn’s disease (CD) patients to accept life-threatening adverse event risks in exchange for CD symptom relief.

Patients with CD completed choice-format conjoint trade-off tasks involving hypothetical treatments with varying efficacy and risk levels. The treatment features included daily symptoms and activity limitations, serious complications (fistulas, abscesses, bowel obstructions), time between flare-ups, oral steroid use and risk of 3 serious adverse events (SAEs) known to be associated with CD treatment (progressive multifocal leukoencephalopathy (PML), serious infections, and lymphoma). The mean maximum acceptable …