Table 3.
Associations between BMD, segments and TT HU values
| Correlation analyses | Linear regression analyses | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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| Univariable r value | p value | Multivariable* r value | p value | Univariable β | t value | p value | Multivariable* β | t value | p value | |
| Segments | -0.22 | 0.001 | -0.22 | 0.001 | -0.22 | -3.42 | 0.001 | -0.22 | -3.52 | 0.001 |
| BMD (DEXA, lateral position) | 0.41 | < 0.001 | 0.48 | < 0.001 | 0.41 | 6.99 | < 0.001 | 0.48 | 8.34 | < 0.001 |
| BMD (DEXA, anteroposterior position) | 0.36 | < 0.001 | 0.44 | < 0.001 | 0.36 | 5.86 | < 0.001 | 0.43 | 7.43 | < 0.001 |
| BMD (QCT, cortical bone) | 0.42 | < 0.001 | 0.42 | < 0.001 | 0.42 | 7.16 | < 0.001 | 0.41 | 7.09 | < 0.001 |
| BMD (QCT, cancellous bone) | 0.74 | < 0.001 | 0.71 | < 0.001 | 0.74 | 16.77 | < 0.001 | 0.71 | 15.54 | < 0.001 |
Dependent variable: TT HU values; Independent variable: BMD, segments.
*
Adjusted for age, gender between segments and TT HU values, adjusted for age, gender and segments between BMD and TT HU values.
β: standard partial regression coefficient. TT HU: Traditional trajectory Hounsfield units; BMD: Bone mineral density; DEXA: Dual-energy X-ray absorptiometry; QCT: Quantitative computed tomography.