Table 1 Demographic characteristics and bone density

Age (y)

59.2 ± 9.8

59.9 ± 10.9

0.873

Gender ratio (male:female)

7:10

24:30

0.927

Smoking (yes/no)

3:14

9:45

0.965

Follow-up time (m)

12.3 ± 5.8

12.7 ± 4.6

0.591

BMI (kg/m²):

26.0 ± 5.4

25.6 ± 2.7

0.842

Spine BMD (g/cm²)

0.845 ± 0.147

0.885 ± 0.168

0.535

Spinal T-score:

−1.8 ± 1.3

−1.6 + 1.1

0.476

Forearm BMD (g/cm²)

0.284 ± 0.662

0.429 ± 0.956

<0.001

Forearm T-score

−2.7 ± 1.1

−1.2 ± 1.2

<0.001

Mean global HU value

96.1 ± 45.0

132.7 ± 40.2

0.015

Operated segment HU value

96.7 ± 55.2

129.0 ± 42.2

0.038

Upper vertebrae of operated segment HU value

94.4 ± 44.6

129.6 ± 40.7

0.029

Lower vertebrae of operated segment HU value

98.5 ± 55.9

130.1 ± 44.4

0.033