Table 3: Values of tBMD, trabecular microstructural parameters, and mechanical properties.

 

Vertebrae that would fracture

Vertebrae that would not fracture

Number of vertebrae

22

41

Lytic lesion (mm2)

41.7 ± 70.3**

9.8 ± 26.8

tBMD

78.5 ± 26.5

84.1 ± 31.4

Ratio to mean value

-3.5 ± 7.9*

1.9 ± 11.0

Microstructural parameters

 

 

App BV/TV (%)

29.1 ± 10.0

30.9 ± 11.7

Ratio to mean value

-3.1 ± 8.3*

1.7 ± 10.7

App Tb.N (1/mm3)

0.31 ± 0.07

0.32 ± 0.07

Ratio to mean value

-2.0 ± 6.9

1.1 ± 9.2

App Tb.Th (μm)

703.0 ± 116.2

707.5 ± 109.2

Ratio to mean value

-0.35 ± 3.8

0.18 ± 5.3

App Tb.S (μm)

877.3 ± 228.3

859.6 ± 250.7

Ratio to mean value

1.9 ± 6.2*

-1.0 ± 6.9

SMI

1.73 ± 0.36

1.66 ± 0.44

Ratio to mean value

3.9 ± 10.0**

-2.1 ± 7.5

Euler’s number

-877.5 ± 626.0

-981.4 ± 694.6

Ratio to mean value

0.72 ± 25.5

-0.39 ± 41.2

Degree of anisotropy

1.45 ± 0.19

1.43 ± 0.23

Ratio to mean value

1.0 ± 2.8

-0.53 ± 5.3

Mechanical properties

 

 

Failure load (N)

2754 ± 1758

2898 ± 1576

Ratio to mean value

-7.8 ± 16.9**

4.2 ± 18.0


Data are means ± SD. Ratio to mean values are mean percent change ± SD. tBMD: Tissue Bone Mineral Density; Ratio to mean value, Ratio to mean value from the three adjacent vertebrae; app BV/TV: Apparent Bone Volume Per Tissue Volume; App Tb.N: Apparent Trabecular Number; App Tb.Th: Apparent Trabecular Thickness; App Tb.S: Apparent Trabecular Spacing; SMI: Structure Model Index

**p < 0.05, *p < 0.01