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Table 2 V-mobility presented as Ha, Hp, WR, and WA, and WR and WA equivalent to V-mobility of 1.0 mm in Ha

From: Equivalent values between anterior vertebral height, wedge ratio, and wedge angle for evaluating vertebral mobility and deformity in osteoporotic vertebral fractures: a conventional observational study

Grade

Level

n

V-mobility

Ha (mm)

Hp (mm)

WR (%)

WA (°)

WR/Ha (%)

WA/Ha (°)

Grade 1

L1

4

3.7 ± 1.4

1.0 ± 1.9

9.4 ± 7.8

5.0 ± 4.1

2.4 ± 1.5

1.2 ± 0.8

L2

3

1.9 ± 0.9

− 0.5 ± 0.6

8.1 ± 4.8

3.7 ± 2.9

4.2 ± 0.4

1.9 ± 0.8

L1-2

7

2.9 ± 1.5

0.4 ± 1.6

8.8 ± 6.2

4.4 ± 3.4

3.2 ± 1.4

1.5 ± 0.8

Grade 2

T11

12

3.9 ± 2.1

1.0 ± 1.3

12.2 ± 5.6

5.3 ± 2.7

3.3 ± 0.9

1.5 ± 0.5

T12

31

3.3 ± 1.9

0.3 ± 1.1

10.2 ± 5.7

4.8 ± 2.9

3.2 ± 1.1

1.5 ± 0.6

L1

37

3.0 ± 1.6

0.0 ± 0.8

9.7 ± 6.0

4.3 ± 2.6

3.2 ± 0.6

1.5 ± 0.6

L2

14

3.8 ± 2.2

0.1 ± 1.0

12.0 ± 7.4

6.1 ± 4.5

3.1 ± 1.2

1.5 ± 0.6

T11-L2

94

3.3 ± 1. 9

0.2 ± 1.0

10.5 ± 6.1

4.9 ± 3.1

3.2 ± 0.9

1.5 ± 0.6

Grade 3

T11

18

3.5 ± 2.8

0.6 ± 1.2

13.0 ± 10.6

5.9 ± 4.3

3.7 ± 1.3

1.8 ± 0.8

T12

57

3.2 ± 1.8

0.2 ± 1.4

11.0 ± 6.8

4.6 ± 3.1

3.5 ± 0.9

1.5 ± 0.8

L1

96

3.5 ± 2.5

0.4 ± 1.3

11.6 ± 7.8

4.9 ± 3.7

3.3 ± 1.0

1.4 ± 0.7

L2

12

3.1 ± 1.6

0.2 ± 1.2

9.7 ± 5.1

4.0 ± 3.2

3.3 ± 0.8

1.4 ± 0.9

T11-L2

183

3.4 ± 2.3

0.3 ± 1.3

11.4 ± 7.6

4.8 ± 3.5

3.4 ± 1.0

1.5 ± 0.8

Grades 1–3

T11-L2

284

3.4 ± 2.1

0.3 ± 1.2

11.1 ± 7.1

4.8 ± 3.4

3.3 ± 1.0

1.5 ± 0.7

  1. The grade 1 OVFs consisted of those at L1 and L2. The differences in the mean values of V-mobility presented as Ha, Hp, WR, WA, WR/Ha, and WA/Ha between each grade of V-deformity were tested by one-way analysis of variance followed by Bonferroni’s post hoc test. The differences in the mean values of WR/Ha and WA/Ha between each level of the spine at T11–L2 in grade 2 and grade 3 vertebrae were tested by Bonferroni’s test, and those between L1 and L2 in grade 1 were tested by Student’s t test. No significant differences in these tests were found
  2. Grade, grade of vertebral deformity; V-mobility, vertebral mobility; Ha, anterior vertebral height; Hp, posterior vertebral height; WR, wedge ratio; WA, wedge angle; WR/Ha, WR equivalent to V-mobility of 1.0 mm in Ha; WA/Ha, WA equivalent to V-mobility of 1.0 mm in Ha