Abstract:
PURPOSE:To determine if vertebral bone densities or vertebral body sizes contribute to gender differences in vertebral bone mass in adults. MATERIALS AND METHODS:Cancellous and cortical bone densities and dimensions of three lumbar vertebrae in 25 women and 18 men were measured with quantitative computed tomography (CT) and statistically analyzed. RESULTS:Neither cancellous nor cortical vertebral bone densities differed in healthy adults. Vertebral bodies in women had lower cross-sectional areas (8.22 cm2 +/- 1.09 [standard deviation] versus 10.98 cm2 +/- 1.25, P < .001) and volumes (22.42 cm3 +/- 2.40 versus 30.86 cm3 +/- 2.6, P < .001). These differences also were evident in men and women matched for age, weight, vertebral bone density, and vertebral body height. Overall cross-sectional areas of vertebral bodies are 25% smaller in women than men. Vertebral bone densities do not differ between sexes. Estimates of mechanical stress within vertebral bodies are 30%-40% higher in women than men for equivalent applied loads. CONCLUSION:Smaller vertebral bodies in women confer biomechanical disadvantages that may contribute to more vertebral fractures in elderly women.
journal_name
Radiologyjournal_title
Radiologyauthors
Gilsanz V,Boechat MI,Gilsanz R,Loro ML,Roe TF,Goodman WGdoi
10.1148/radiology.190.3.8115610subject
Has Abstractpub_date
1994-03-01 00:00:00pages
678-82issue
3eissn
0033-8419issn
1527-1315journal_volume
190pub_type
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