The efficacy and safety of either infliximab or adalimumab in 362 patients with anti-TNF-α naïve Crohn's disease

Summary

Background

TNFα antagonists, including infliximab (IFX) and adalimumab (ADA), have revolutionised treatment for Crohn's disease. Studies comparing efficacy in patients with Crohn's disease naïve to TNFα antagonists are lacking.

Aims & Methods

Consecutive TNFα antagonist-naïve patients with luminal or perianal Crohn's disease from four tertiary centres in Austria were assessed prospectively for induction and maintenance efficacy, and safety of either IFX or ADA.

Results

In a total of 362 patients, 251 (69.3%) started IFX and 111 (30.7%) started ADA. At baseline, the median Harvey–Bradshaw Index (HBI) score was 8 (range 5–29) and 8 (5–36), and the median C-reactive protein (CRP) was 1.07 (interquartile range (IQR) 1.36) mg/dL and 1.16 (IQR 1.23) mg/dL for IFX and ADA, respectively. At week 12, there was no difference between IFX and ADA among patients with luminal Crohn's disease in clinical remission (IFX 128/204; 62.7% vs. ADA 68/107; 63.6%, P = 0.47), clinical response (IFX 154/204; 75.5% vs. ADA 82/107; 76.6%, P = 0.82) and steroid-free remission (IFX 110/204; 53.9% vs. ADA 61/107; 57%, P = 0.60). At 12 months, there were similar numbers of patients treated with IFX and ADA who maintained clinical remission (IFX 77/154; 50.4% vs. ADA 47/82; 57.3%, P = 0.48) and steroid-free remission (IFX 68/154; 44.3% vs. ADA 44/82; 53.7%, P = 0.16). Baseline CRP >0.7 mg/dL (OR 0.24; 95% CI 0.07–0.77, P = 0.01) was the only predictor of clinical remission at 12 months in patients who did not have escalation of anti-TNFα therapy.

Conclusion

IFX and ADA appear comparable in clinical outcomes for patients with Crohn's disease who are naïve to TNFα antagonists.

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