E071 Bimekizumab demonstrates sustained improvement in quality of life up to week 52 in patients across the full spectrum of axial spondyloarthritis: results from two phase 3 studies
Authors: McKay Neil D , Bennett Alexander , Goodson Nicola , Fleurinck Carmen , de la Loge Christine , Massow Ute , Taieb Vanessa , Marzo-Ortega Helena , Gaffney Karl 
Published: April 2024

Abstract

Background/Aims
Bimekizumab (BKZ), a monoclonal IgG1 antibody that selectively inhibits IL-17F in addition to IL-17A, has demonstrated rapid and clinically meaningful improvements in disease activity in patients across the full spectrum of axial spondyloarthritis (axSpA; active non-radiographic axSpA [nr-axSpA; BE MOBILE 1, NCT03928704] and ankylosing spondylitis [AS]/ radiographic axSpA [r-axSpA; BE MOBILE 2, NCT03928743]). Here we report health-related quality of life (HRQoL) outcomes (ASQoL, SF-36 and EQ-5D-3L) from the two parallel phase 3 studies up to Week (Wk)52.

Methods
BE MOBILE 1 and 2 have similar study designs: 16-Wk double-blind placebo (PBO)-controlled period followed by 36-Wk maintenance period. Patients were randomised (1:1 in BE MOBILE 1; 2:1 in BE MOBILE 2) to receive BKZ 160 mg Q4W or PBO. All patients received BKZ 160 mg Q4W from Wk16 to Wk52. We report ASQoL, SF-36 - physical component summary (PCS) and SF-36 - mental component summary (MCS) scores up to Wk52 and proportion of patients with ’no problem’ in each of the 5 EQ- 5D-3L domains (mobility, selfcare, usual activity, pain/discomfort, and anxiety/ depression). The results are presented as observed cases (OC), and missing data were imputed using multiple imputation (MI).

Results
254 nr-axSpA (BKZ: 128; PBO: 126) and 332 r-axSpA(BKZ: 221; PBO: 111) patients were randomised with 86.6% and 89.8% completing to Wk52, respectively. At Wk16, BKZ treated patients reported greater improvements in ASQoL and SF-36 PCS compared to PBO (p &lt; 0.001, all comparisons, using Analysis of Covariance [ANCOVA]). By Wk52, these improvements across all HRQoL outcomes were sustained in BKZ treated patients and improved in patients who switched to BKZ at Wk16. (Table). The baseline SF-36 MCS levels indicated that on average patients had normal scores which remained unchanged throughout the study. The proportion of patients reporting ‘no problem’ across all five EQ-5D-3L domains improved over time up to Wk52. In patients with ASQoL ≥4 at baseline, &gt;60% of patients had ≥4-point improvement in ASQoL at Wk52.

Conclusion
Across the axSpA disease spectrum, treatment with BKZ compared with PBO at Wk16 significantly improved quality of life outcomes measured by EQ-5D-3L, ASQoL and SF-36 PCS scores which were sustained to Wk52.

Disclosure
N.D. McKay: Consultancies; NDM has received consultancy fees from Gilead and UCB Pharma. Other; NDM has received a registration fees for attendance at a conference from Abbvie, Novartis and UCB Pharma, NDM has received a fee for lecturing from Gilead, NDM has taken part in education meetings, programmes and examinations for a wide range of pharmaceutical companies. A. Bennett: Honoraria; AB received teaching honorarium from Abbvie Ltd, Pfizer, UCB Pharma, Novartis and Biogen. Grants/research support; AB received research grants from Pfizer. Other; AB received advisory board fees from Abbvie Ltd, Pfizer, UCB Pharma, MSD, Novartis and Lilly. N. Goodson: Honoraria; NG has received honoraria from UCB Pharma and Novartis. C. Fleurinck: Other; CF is an employee of UCB Pharma. C. de la Loge: Consultancies; CdlL is a consultant to UCB Pharma, Brussels, Belgium. U. Massow: Other; UM is an employee of UCB Pharma. V. Taieb: Other; VT is employee of UCB Pharma. H. Marzo-Ortega: Grants/research support; HMO has received grants/research support from Janssen, Novartis and UCB Pharma. Other; HMO has received honoraria and/or consultancy and/or speaker fees from Abbvie, Biogen, Celgene, Janssen, Eli-Lilly, Moonlake, Novartis, Pfizer and UCB Pharma. K. Gaffney: Shareholder/stock ownership; KG is a shareholder of Rheumatology Events. Grants/research support; KG has received grants/research support from NASS, Versus Arthritis, AbbVie, Pfizer, UCB Pharma, Norvartis, Eli Lilly, Cellgene, Celltrion, Janssen, Gilead and Biogen. Other; KG has received honoraria/ consultation fees from Novartis, AbbVie, UCB Pharma, Lilly and Pfizer, KG has received speaker’s bureau from Novartis, UCB Pharma, AbbVie and Lilly; meeting expenses from AbbVie, Lilly, Roche, Novartis, Pfizer and UCB Pharma.