Abstract
Discussion: This study showed that there is a relatively constant rate of decrease in BMD along the radius, from the 1/3rd to about the 10% locations. Prior studies have generally reported BMD at either the 1/3rd or the ultra-distal (UD) sites. It would be interesting to examine whether the axial profile of BMD at the radius might be relevant in terms of estimating the risk of radius fracture, as compared with using the 1/3rd or UD sites alone. This study also shows that ultrasound is an excellent proxy for BMD, with a correlation coefficient of r5 0.9. The data also indicates that ultrasonic assessment of BMD at the radius is very robust with respect to variations in geometry (radial width in the 16 forearms was observed to increase almost 30% from the 1/3rd to the 10% locations) as well as to changes in percentages of trabecular bone content (trabecular bone increases from 1% to 20% from the 1/3rd to the 10% locations).
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