Archives of Orthopaedic and Trauma Surgery

, Volume 132, Issue 5, pp 591–598

Computational measurement of joint space width and structural parameters in normal hips

  • Takashi Nishii
  • Toshiyuki Shiomi
  • Takashi Sakai
  • Masaki Takao
  • Hideki Yoshikawa
  • Nobuhiko Sugano
Orthopaedic Surgery

DOI: 10.1007/s00402-012-1463-1

Cite this article as:
Nishii, T., Shiomi, T., Sakai, T. et al. Arch Orthop Trauma Surg (2012) 132: 591. doi:10.1007/s00402-012-1463-1

Abstract

Introduction

Joint space width (JSW) of hip joints on radiographs in normal population may vary by related factors, but previous investigations were insufficient due to limitations of sources of radiographs, inclusion of subjects with osteoarthritis, and manual measurement techniques. We investigated influential factors on JSW using semiautomatic computational software on pelvic radiographs in asymptomatic subjects without radiological osteoarthritic findings.

Methods

Global and local JSW at the medial, middle, and lateral compartments, and the hip structural parameters were measured in asymptomatic, normal 150 cases (300 hips), using a customized computational software.

Results

Reliability of measurement in global and local JSWs was high with intraobserver reproducibility (intraclass correlation coefficient) ranging from 0.957 to 0.993 and interobserver reproducibility ranging from 0.925 to 0.985. There were significant differences among three local JSWs, with the largest JSW at the lateral compartment. Global and medial local JSWs were significantly larger in the right hip, and global, medial and middle local JSWs were significantly smaller in women. Global and local JSWs were inversely correlated with CE angle and positively correlated with horizontal distance of the head center, but not correlated with body mass index in men and women. They were positively correlated with age and inversely correlated with vertical distance of the head center only in men.

Conclusions

There were interindividual variations of JSW in normal population, depending on sites of the weight-bearing area, side, gender, age, and hip structural parameters. For accurate diagnosis and assessment of hip osteoarthritis, consideration of those influential factors other than degenerative change is important.

Keywords

Hip joint Joint space width Radiographs Computational measurement 

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Takashi Nishii
    • 1
  • Toshiyuki Shiomi
    • 2
  • Takashi Sakai
    • 2
  • Masaki Takao
    • 2
  • Hideki Yoshikawa
    • 2
  • Nobuhiko Sugano
    • 1
  1. 1.Department of Orthopaedic Medical EngineeringOsaka University Graduate School of MedicineSuitaJapan
  2. 2.Department of Orthopaedic SurgeryOsaka University Graduate School of MedicineSuitaJapan

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