Etanercept in Axial Spondyloarthritis, Psoriatic Arthritis, and Plaque Psoriasis: Real-World Outcome Data from German Non-interventional Study ADEQUATE

IntroductionFor chronic diseases such as axial spondyloarthritis (axSpA), psoriatic arthritis (PsA), and plaque psoriasis (PsO), treatment goals include remission or at least low disease activity (LDA) by 12 weeks. Improvements in symptoms such as pain and fatigue should also be treatment goals.MethodsADEQUATE was a German, prospective, non-interventional study to evaluate the proportion of patients with rheumatoid arthritis, PsA, axSpA, or PsO who, in routine clinical practice, benefit from the continuation of treatment with etanercept (ETN) beyond 12 weeks, even when their treatment goals have not yet been reached. Patient-reported outcomes (PROs) and changes in concomitant glucocorticoid use were also recorded. This article focuses on results for patients with axSpA and PsA; data for patients with PsO are described briefly.ResultsIn total, 305, 254, and 70 patients with axSpA, PsA, and PsO, respectively, were included. Rates of remission at week 12 and week 24, respectively, were 19% and 18% for axSpA, 38% and 51% for PsA, and 7% and 19% for PsO. Rates of LDA at week 12 and week 24, respectively, were 39% and 45% for axSpA, 50% and 60% for PsA, and 34% and 51% for PsO. Extending treatment up to 52 weeks was associated with stable rates of or further increases in remission and LDA rates. Improvements in pain, fatigue, and depression (axSpA, PsA, and PsO) and reductions in concomitant glucocorticoid use (axSpA and PsA) were observed. No new safety signals were detected.ConclusionThese findings confirm the effectiveness and safety of ETN in routine clinical practice for several indications and highlight potential benefits of continuing ETN treatment in patients who have not reached their treatment goals after 12 weeks. Additional benefits included improvements in PROs and reduction of concomitant glucocorticoids.Trial RegistrationClinicalTrials.gov NCT02486302. Axial spondyloarthritis is a disorder that causes joint pain mainly in the spine and can cause deformation of the spine. Psoriatic arthritis and plaque psoriasis are disorders that cause dry, itchy, and raised skin patches. Psoriatic arthritis also causes swollen, stiff, and painful joints. Etanercept is a treatment used to reduce the symptoms of axial spondyloarthritis, psoriatic arthritis, and plaque psoriasis. The aim of treatment is remission, or low disease activity after 12 weeks. In this study, people received etanercept for up to 52 weeks from their usual doctors in Germany. A total of 305 people with axial spondyloarthritis, 254 people with psoriatic arthritis, and 70 people with plaque psoriasis took part in the study. After 12 weeks of treatment, 19 in 100 people with axial spondyloarthritis were in remission and 39 in 100 people had low disease activity. In addition, 38 in 100 people with psoriatic arthritis were in remission and 50 in 100 people had low disease activity. Finally, 7 in 100 people with plaque psoriasis were in remission and 34 in 100 people had low disease activity. These numbers remained mostly stable until the end of the study. People also reported less pain, fatigue, and depression. Most people were able to use less glucocorticoids. The number and types of unwanted side effects were similar to those seen in other studies of etanercept in people with axial spondyloarthritis, psoriatic arthritis, or plaque psoriasis.