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  • Title: Ixekizumab improves patient-reported outcomes in patients with active psoriatic arthritis and inadequate response to tumour necrosis factor inhibitors: SPIRIT-P2 results to 52 weeks.
    Author: Kavanaugh A, Marzo-Ortega H, Vender R, Wei CC, Birt J, Adams DH, Benichou O, Lin CY, Nash P.
    Journal: Clin Exp Rheumatol; 2019; 37(4):566-574. PubMed ID: 30557128.
    Abstract:
    OBJECTIVES: To report patient-reported outcomes (PROs) of ixekizumab-treated patients with psoriatic arthritis (PsA) and an inadequate response (IR) or intolerance to tumour necrosis factor inhibitors (TNFi) to 52 weeks. METHODS: In SPIRIT-P2, patients with active PsA and an IR or intolerance to TNFi were randomised to ixekizumab 80 mg every 4 weeks (IXEQ4W; N=122) or every 2 weeks (IXEQ2W; N=123), or placebo (PBO; N=118) during the initial 24-week double-blind treatment period. At Week 16, background therapy was modified for IRs; additionally, IRs in the placebo group were re-randomised (1:1) to IXEQ2W or IXEQ4W. Patients receiving ixekizumab at Week 24 received the same dose during the study remainder. Patients completed several PROs for PsA disease activity, skin, health-related quality of life (HRQOL, and work through Week 52. RESULTS: Ixekizumab-treated patients reported significant improvements versus PBO in 36-Item Short Form Health Survey version 2, European Quality of Life 5 Dimensions visual analogue scale, Bath Ankylosing Spondylitis Disease Activity Index (total score and question 2), and Work Productivity and Activity Impairment Questionnaire-Specific Health Problem (3 of 4 domains) through Week 24. At Week 24, 9% (PBO), 52% (IXEQ4W), and 50% (IXEQ2W) of patients reported Dermatology Life Quality Index scores of 0 or 1; 0% (PBO) and 24% (IXEQ4W and IXEQ2W) reported Itch Numeric Rating Scale score of 0. Where data were collected, improvements persisted through Week 52. CONCLUSIONS: In patients with PsA and an IR or intolerance to TNFi, ixekizumab significantly improved disease activity, skin symptoms, HRQOL, and work productivity to 52 weeks.
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