Answer to the Letter to the Editor of V. B. Safer et al. concerning “Analysis of skeletal muscle mass in women over 40 with degenerative lumbar scoliosis” by Eguchi Y et al. (Eur Spine J; 2018: doi:10.1007/s00586-018-5845-0)

[摘要] We are truly grateful for the opportunity to respond to this Letter to the Editor concerning our recently published study entitled “Analysis of skeletal muscle mass in women over 40 with degenerative lumbar scoliosis” [1]. First, we thank the authors for their interest in our work and for the opportunity to further explain our body composition analysis using the bioelectrical impedance analysis (BIA) and the classifcation of sarcopenia. BIA measures tissue impedance by circulating a weak alternating current through the hydrated tissues of the body [2].