The diagnostic role of dual femur bone density measurement in low-impact fractures

Wong, Joseph C. H., McEwan, Louise, Lee, Naomi, Griffiths, Matthew R. and Pocock, Nicholas A. (2003) The diagnostic role of dual femur bone density measurement in low-impact fractures. Osteoporosis International, 14 4: 339-344. doi:10.1007/s00198-003-1378-3


Author Wong, Joseph C. H.
McEwan, Louise
Lee, Naomi
Griffiths, Matthew R.
Pocock, Nicholas A.
Title The diagnostic role of dual femur bone density measurement in low-impact fractures
Journal name Osteoporosis International   Check publisher's open access policy
ISSN 0937-941X
1433-2965
Publication date 2003-06-01
Sub-type Article (original research)
DOI 10.1007/s00198-003-1378-3
Volume 14
Issue 4
Start page 339
End page 344
Total pages 6
Place of publication London
Publisher Springer International
Language eng
Subject 110320 Radiology and Organ Imaging
Abstract A high correlation has been documented between the left and right femoral bone mineral densities in the normal population. This suggests that dual femur measurements are not justified in clinical practice. This study evaluated whether this premise holds for subjects who have lost bone mass and have sustained fractures with minimal trauma. Seventy-eight women aged 31–83 years (mean=66 years) with previous low-impact fractures had both proximal femora measured using dual-energy X-ray absorptiometry. There were significant correlations between values in the left and right total hip (TH) ( r=0.95; p<0.05) and in the left and right femoral neck (FN) ( r=0.90; p<0.05). The mean differences between the left and right TH and FN densities were not significant. However, the range of the limits of agreement for the TH (-0.074 to 0.086 g/cm 2) and FN (-0.115 to 0.105 g/cm 2) were greater than the 95% confidence interval for true change for the TH (0.05 g/cm 2) and FN (0.07 g/cm 2). Any longitudinal BMD assessment therefore needs to measure the same proximal femur to get a reliable comparison. A one-tailed analysis showed that for the TH, 7.5% of subjects had a T-score discordance greater than or equal to 0.5 and 0.5% had a T-score discordance greater than or equal to 1. For the FN, 9% had a T-score discordance greater than or equal to 0.5 and 2.5% had a T-score discordance greater than or equal to 1. The use of dual femur measurements increases the diagnostic yield by about 10% in subjects with prior minimal trauma fractures.
Keyword Osteoporosis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Health and Rehabilitation Sciences Publications
 
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