Figure 3. Correlation between HU and age in cortical and cancellous bone.
(a) Cortical bone radiodensity is not significantly associated with age (n = 56, r = −0.004, P = 0.977). (b) There is a statistically significant positive linear correlation between cancellous bone radiodensity and age (n = 56, r = 0.574, P<0.0000).