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Table 2 Associations between Vitamin D and BMD at Lumbar, Femur neck, and Hip

From: Free vitamin D correlate better with bone mineral density and thoracolumbar junction osteoporotic vertebral fractures than serum vitamin D

Dependent variables:

Total 25(OH)D

Free 25(OH)D

β(95% CI)a

p value

β(95% CI) a

p value

Lumbar BMD

0.002 (0.000, 0.004)

0.093

0.016 (0.002, 0.030)

0.030*

Femur neck BMD

0.002 (0.000, 0.004)

0.081

0.008 (−0.007, 0.023)

0.290

Hip BMD

0.001(−0.002, 0.004)

0.433

0.002 (−0.015, 0.019)

0.798

Lumbar T score

0.002(− 0.028, 0.032)

0.912

0.115 (− 0.070, 0.299)

0.219

Femur neck T score

0.014(−0.011, 0.039)

0.276

0.118 (−0.038, 0.274)

0.135

Hip T score

0.013(−0.009, 0.035)

0.254

0.024 (−0.112, 0.160)

0.727

  1. CI Confidence interval
  2. a multiple linear regression model: adjusted for age, gender, BMI
  3. *means statistically significant values (p < 0.05)