Answer to the Letter to the Editor of Y. Yamada, et al. concerning "T1 pelvic angle is associated with rapid progression of hip arthrosis" by Nakamura K et al. (Eur Spine J [2023]: https://doi.org/10.1007/s00586-023-07580-0)
1 Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-Machi, Takatsuki, 569-8686, Japan.
2 Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, 2-7 Daigaku-Machi, Takatsuki, 569-8686, Japan. yoshinori.okamoto@ompu.ac.jp.