Effectiveness and Drug Survival of Anti–Tumor Necrosis Factor α Therapies in Patients With Spondyloarthritis: Analysis From the Thai Rheumatic Disease Prior Authorization Registry

ObjectiveThis study aimed to evaluate the long-term effectiveness and safety of the first anti–tumor necrosis factor α therapy (TNFi) and to identify the associated factors of drug discontinuation in patients with spondyloarthritis.MethodsThis was a medical records review study. Patients with spondy