Disease-modifying antirheumatic drug selection in Japanese patients with rheumatoid arthritis treated with biologics or JAK inhibitors without methotrexate: A retrospective hospital-based administrative claims database study.

MTX is used less frequently among older Japanese rheumatoid arthritis patients or those with comorbidities. In such patients, ABA is the most frequently used drug, followed by interleukin-6 receptor inhibitor, when MTX is not used at treatment start.