Scientific Reports (Jul 2022)

Association between acetabular dysplasia and sagittal spino-pelvic alignment in a population-based cohort in Japan

  • Teiji Harada,
  • Hiroshi Hashizume,
  • Takaya Taniguchi,
  • Toshiko Iidaka,
  • Yoshiki Asai,
  • Hiroyuki Oka,
  • Shigeyuki Muraki,
  • Toru Akune,
  • Hiroshi Kawaguchi,
  • Kozo Nakamura,
  • Munehito Yoshida,
  • Sakae Tanaka,
  • Noriko Yoshimura,
  • Hiroshi Yamada

DOI
https://doi.org/10.1038/s41598-022-16865-1
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 7

Abstract

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Abstract The relationship between acetabular dysplasia and spino-pelvic alignment remains unclear. The aim of this study was to clarify the association between acetabular dysplasia and spino-pelvic alignment, based on a large-scale population-based cohort in Japan. From the third survey of the Research on Osteoarthritis/Osteoporosis Against Disability (ROAD) study, 1,481 participants (491 men and 990 women; mean age, 65.3 years) were analyzed. Center-edge (CE) angle and spino-pelvic parameters (lumbar lordosis, LL; sacral slope, SS; pelvic tilt, PT; pelvic incidence, PI) were measured radiographically. Acetabular dysplasia was defined as a CE angle < 20°, and associations between acetabular dysplasia and spino-pelvic parameters were assessed. The group with acetabular dysplasia had significantly higher age, higher percentage of female, higher SS and higher PI than the group without acetabular dysplasia in a univariate analysis. On the other hand, acetabular dysplasia was not significantly associated with spino-pelvic parameters in a multiple logistic regression analysis that include age, sex, SS and PI as explanatory variables; however, PI demonstrated a positive odds ratio (odds ratio, 1.02; 95% CI 1.00–1.04). In conclusion, acetabular dysplasia was not significantly associated with spino-pelvic parameters, but higher PI may be an associated factor for acetabular dysplasia.