Table 1.

Comparison of CT Attenuation in the Thoracic Spine for Patients Aged <65 Years Versus Patients Aged ≥65 Years.

Thoracic Spine	<65 Years	≥65 Years	P Value
n	33	41
Mean HU	196.51	105.90	9.3 × 1013
SD of mean HU	48.87	45.10
HU ≤ 110	4	22	.0002
HU > 110	29	19
HU ≤ 135	7	33	4.14 × 10−7
HU > 135	26	8
HU ≤160	7	35	2.43 × 10−8
HU > 160	26	6

Abbreviations: CT, computed tomography; SD, standard deviation.