Characteristics of Lumbar Bone Density in Middle-Aged and Elderly Subjects: A Correlation Study between T-Scores Determined by the DEXA Scan and Hounsfield Units from CT

Table 2

Correlation between the CT values and BMD T-scores in different lumbar sequences.

Lumbar sequences	CT		DEXA		r
	CT values (HU)	CV (%)	BMD T-scores	CV (%)
L1	145.91 ± 8.69	5.96	−1.19 ± 0.17	14.29	0.538	＜0.001
L2	143.18 ± 8.60	6.01	−0.95 ± 0.18	18.95	0.435	0.004
L3	137.39 ± 8.28	6.03	−0.89 ± 0.19	21.35	0.290	0.062
L4	135.23 ± 8.22	6.08	−0.72 ± 0.20	27.78	0.220	0.161
Average	140.43 ± 4.20	2.99	−0.94 ± 0.09	9.57	0.349	＜0.001

CV: coefficients of variance.