Abstract
Background/Aims: Although anti-tumor necrosis factor (TNF)-α agents are important therapeutic drugs for Crohn’s disease (CD), data regarding their long-term sustained effects are limited. Herein, we evaluated the long-term loss of response (LOR) to anti-TNF-α agents in patients with CD.Methods: This retrospective study included patients with CD who started treatment with infliximab or adalimumab as a first-line therapeutic approach. The cumulative event-free, retention, and surgery-free rates after the start of biological therapy were analyzed. Secondary LOR was analyzed in patients who achieved corticosteroid-free clinical remission after the start of biological therapy. Cox proportional hazards models were used to analyze the predictive factors of secondary LOR.Results: The cumulative event-free rates at 1, 2, 5, and 10 years were 83.3%, 75.1%, 37.4%, and 23.3%, respectively. The incidence of LOR was 10.6% per patient-year of follow-up. At 12–14 weeks after the start of biological therapy, the proportion of patients with a C-reactive protein to albumin (CRP/ALB) ratio ≥0.18 was significantly higher in patients with LOR (<i>P</i><0.001). Multivariate analysis indicates that a CRP/ALB ratio ≥0.18 (hazard ratio [HR], 5.86; 95% confidence interval [CI], 1.56–22.0; <i>P</i>=0.009) and upper gastrointestinal tract inflammation (HR, 3.00; 95% CI, 1.26–7.13; <i>P</i>=0.013) were predictive factors of secondary LOR.Conclusions: Although anti-TNF-α agents contributed to long-term clinical remission of CD, the annual incidence of secondary LOR was 10.6%. The CRP/ALB ratio at 3 months after the start of biological therapy and upper gastrointestinal tract inflammation were identified as predictive factors of secondary LOR.
Publisher
Korean Association for the Study of Intestinal Diseases
Cited by
4 articles.
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