The comparative long-term survival of first-line biologics for UC and reasons for drug discontinuation are poorly understood. We sought to compare the long-term drug survival related to non-response (NR) and adverse effects (AEs) for vedolizumab, adalimumab, and infliximab among biologic-naïve patients with UC.
This was a retrospective cohort study of adult biologic-naïve patients with moderate-to-severe UC initiating vedolizumab, adalimumab, or infliximab 6/1/14-12/31/20 at a large academic medical center. The primary outcome was time to biologic discontinuation for primary or secondary NR (including colectomy). The secondary outcome was time to biologic discontinuation due to AEs. Inverse probability of treatment-weighted (IPTW) Cox regression was used to perform three pair-wise comparisons of drug survival.
The cohort included 805 patients with UC who initiated vedolizumab (n = 195), adalimumab (n = 278), or infliximab (n = 332). The adjusted hazard of biologic discontinuation for NR was significantly lower for vedolizumab vs adalimumab (HR 0.51, 95% CI 0.34-0.75), similar for vedolizumab vs infliximab (HR 1.32, 95% CI 0.79-2.18), and greater for adalimumab vs infliximab (HR 2.07, 95% CI 1.51-2.86). The adjusted hazard of discontinuation for AEs was significantly lower for vedolizumab vs adalimumab (HR 0.25, 95% CI 0.09-0.64), lower for vedolizumab vs infliximab (HR 0.21, 95% CI 0.10-0.46), and similar for adalimumab vs infliximab (HR 0.85, 95% CI 0.53-1.35).
There was greater survival of vedolizumab compared to adalimumab for clinical response and greater survival of vedolizumab compared to both adalimumab and infliximab for AEs. These long-term data support the use of vedolizumab as a first-line biologic over adalimumab for biologic-naïve patients with UC.