Tada M, et al. - This study entailed comparison between abatacept (ABT) and other biologic disease-modifying anti-rheumatic drugs (bDMARDs) in terms of the effect on bone mineral density (BMD) and bone metabolic markers (BMMs) in patients with rheumatoid arthritis (RA). Compared with other bDMARDs, a superior efficacy of ABT for increasing BMD at the femoral neck was reported. ABT may offer good efficacy for improving BMD at the femoral neck in patients with RA.