Shunsuke Kikuchi, Daisuke Nakashima, Yoshitake Yamada, Minoru Yamada, Yoichi Yokoyama, Arihiko Kanaji, Masaya Nakamura, Takeo Nagura, Masahiro Jinzaki

February 2022, Volume 31, Issue 2, pp 215 - 224 Original Article Read Full Article 10.1007/s00586-020-06664-5

First Online: 27 November 2020


A close relationship between sagittal spinal alignment and hip osteoarthritis (OA) has been documented. This study aimed to examine the relationship between hip joint proximity area and sagittal balance parameters in healthy subjects.


This prospective study enrolled 47 healthy volunteers who underwent 320-detector row upright computed tomography. Acquired data were reconstructed in a virtual three-dimensional space. The proximity area was determined by 


The anterior proximity group (n = 24) had higher SVA (p = 0.016) and T1-Spi (p = 0.015) than the posterior proximity group (n = 23). CAM-HA-offset was higher in the posterior than in the anterior proximity group (p  0.05).


The anterior proximity group had a positive anterior spinal balance; the posterior proximity group may have a more posterior gravity line than the hip joint centre. The anterior spinal balance may contribute to the anterior loading of the hip joint, with known relation with the initiation and onset of hip OA.

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