Abstract
Background
The outcomes of infliximab dose escalation in ulcerative colitis (UC) have not been well evaluated.
Aims
To assess the short- and long-term outcomes of infliximab dose escalation in a cohort of patients with UC.
Methods
This was a multicenter, retrospective, cohort study. All consecutive UC patients who had lost response to infliximab maintenance infusions and who underwent infliximab dose escalation were included. Post-escalation short-term clinical response and remission were evaluated. In the long term, the cumulative probabilities of infliximab failure-free survival and colectomy-free survival were calculated. Predictors of short-term response and event-free survival were estimated using logistic regression analysis and Cox proportional hazard regression analysis.
Results
Seventy-nine patients were included. Fifty-four patients (68.4 %) achieved short-term clinical response and 41 patients (51.9 %) entered in clinical remission. After a median follow-up of 15 months [interquartile range (IQR) 8–26], 33 patients (41.8 %) had infliximab failure. Patients with short-term response had a significantly lower adjusted rate of infliximab failure [hazard ratio (HR) 0.24, 95 % confidence interval (CI) 0.12–0.49; p < 0.001]. During a median follow-up of 24 months (IQR 13–34), 9 patients (11.4 %) needed colectomy. Short-term response was identified as a predictor of colectomy avoidance (HR 0.14; 95 % CI 0.03–0.69; p < 0.007).
Conclusions
In UC patients who lost response to infliximab during maintenance, infliximab dose escalation enabled recovery of short-term response in nearly 70 % of patients. In the long term, 58 % of patients maintained sustained clinical benefit, and 9 of 10 avoided colectomy. Short-term response was associated with an 86 % reduction in the relative risk of colectomy.
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Acknowledgments
The authors would like to thank Dr. C. Fernandez for her assistance in the statistical analysis and Dr. G. Morley for writing support and for reviewing the English manuscript.
Conflict of interest
C.T., M.B., M.C., C.S., G.B., M.D.M., J.P.G., V.G., I.M., F.B., M.Ch., M.P.M., J.L.M., and I.F. have served as a speaker and consultant for MSD and AbbVie. M.Ch. has received research funding from MSD and AbbVie. The remaining authors declare that they have nothing to disclose. Writing support was provided by G. Morley and funded by MSD of Spain.
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Taxonera, C., Barreiro-de Acosta, M., Calvo, M. et al. Infliximab Dose Escalation as an Effective Strategy for Managing Secondary Loss of Response in Ulcerative Colitis. Dig Dis Sci 60, 3075–3084 (2015). https://doi.org/10.1007/s10620-015-3735-4
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DOI: https://doi.org/10.1007/s10620-015-3735-4