HIP AND LUMBOSACRAL JOINT CENTRE LOCATIONS IN ASIAN POPULATION: BIASES BY EXISTING REGRESSIONS AND DEVELOPMENT OF NEW METHODS

Authors

Natsuki Sado, University of Tsukuba, TsukubaFollow
Takeshi Edagawa, University of Tsukuba, TsukubaFollow
Toshihide Fujimori, University of Tsukuba, TsukubaFollow
Shogo Hashimoto, University of Tsukuba, TsukubaFollow
Yoshikazu Okamoto, University of Tsukuba, TsukubaFollow
Takahito Nakajima, University of Tsukuba, TsukubaFollow

Category

Methods

Document Type

Paper

Abstract

Accurate prediction of the lumbosacral and hip joint centres (LSJC, HJC) is crucial for the analysis of lumbo-pelvic-hip dynamics in various movements. Here we show that pre-existing regressions proposed by European research groups produce biased estimates of the LSJC and HJC in Japanese males and females (n = 23, 24), and that the biases in LSJC depend on sex. When compared to locations directly measured by MRI, the pre-existing regressions estimated the LSJC to be more posterior in males and more inferior and posterior in females, and the HJC to be more medial for both sexes. We suggest the importance of considering racial and sexual differences in morphology. We propose new regressions for Asians and validate them using leave-one-out cross-validation. Our regression can be a powerful solution for accurate motion analysis in Asians.

Recommended Citation

Sado, Natsuki; Edagawa, Takeshi; Fujimori, Toshihide; Hashimoto, Shogo; Okamoto, Yoshikazu; and Nakajima, Takahito (2023) "HIP AND LUMBOSACRAL JOINT CENTRE LOCATIONS IN ASIAN POPULATION: BIASES BY EXISTING REGRESSIONS AND DEVELOPMENT OF NEW METHODS," ISBS Proceedings Archive: Vol. 41: Iss. 1, Article 93.
Available at: https://commons.nmu.edu/isbs/vol41/iss1/93