Different Pattern of T-Score Discordance between Patients with Atypical Femoral Fracture and Femur Neck Fracture

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Abstract

Background: Our study evaluated the prevalence and pattern of T-score discordance between the spine and hip in Korean patients with atypical femoral fracture (AFF) and femur neck fracture (FNF). Methods: A total of 49 patients (all women) who were treated for AFF and 1:3 matched 147 female patients with FNF were included from January 2012 to August 2022. A discordance of more than 1.5 between lumbar spine and femur neck bone mineral density (BMD) was defined as a difference and divided into 3 groups: lumbar low (LL; lumbar BMD is less than femur neck BMD), no discordance (ND), and femur neck low (FL; femur neck BMD is less than lumbar BMD). We compared the prevalence and pattern of discordance between 2 groups, and the associated risk factors of T-score discordance among the subjects were evaluated using regression analysis. Results: The prevalence of discordance was significantly higher in patients with AFF (51%) than in those with FNF (25.2%; P<0.001). LL discordance was found in 46.9% of the patients with AFF but only 4.8% in those with FNF. Conversely, FL discordance was found in 4.1% of the patients with AFF and 20.4% in those with FNF, respectively. No specific risk factor was found as T-score discordance in the 2 groups. Conclusions: Clinicians should be aware that the pattern of T-score discordance can vary depending on the location of osteoporotic fractures. In addition, a longitudinal study would be necessary to verify the pattern of T-score discordance related to the osteoporotic fracture location.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
JournalJournal of Bone Metabolism
Volume30
Issue number1
DOIs
StatePublished - Feb 2023

Bibliographical note

Publisher Copyright:
© 2023 Korean Society for Bone and Mineral Research. All rights reserved.

Keywords

  • Absorptiometry
  • Bone density
  • Femoral fractures
  • Osteoporosis
  • photon

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