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Table 2 Patient radiographic data

From: The effects of anterior vacuum disc on surgical outcomes of degenerative versus spondylolytic spondylolisthesis: at a minimum two-year follow-up

 

Degenerative group (n = 22)

Isthmic group (n = 20)

p - value

Preoperative static view

   

 Segmental angle, o

10.70 ± 5.42

9.63 ± 5.70

0.538

 Intradiscal angle, o

4.74 ± 5.51

1.92 ± 3.01

0.049

  Slippage, mm

6.85 ± 2.27

12.22 ± 5.15

< 0.001

  ADH, mm

7.46 ± 3.09

4.12 ± 2.42

< 0.001

  PDH, mm

5.16 ± 1.39

3.29 ± 1.85

0.001

Preoperative flexion view

   

 Segmental angle, o

5.14 ± 6.72

10.53 ± 6.79

0.014

 Intradiscal angle, o

0.20 ± 6.38

1.09 ± 4.00

0.595

  Slippage, mm

9.08 ± 2.26

10.84 ± 5.54

0.177

Preoperative extension view

   

 Segmental angle, o

14.89 ± 6.95

14.25 ± 5.60

0.350

 Intradiscal angle, o

7.12 ± 5.152

2.65 ± 2.11

0.005

  Slippage, mm

5.16 ± 2.72

10.11 ± 4.12

< 0.001

Postoperative static view

   

 Segmental angle, o

12.61 ± 5.54

14.25 ± 5.60

0.350

 Intradiscal angle, o

6.11 ± 3.37

2.65 ± 2.11

< 0.001

  Slippage, mm

5.65 ± 1.86

8.73 ± 3.79

0.002

  ADH, mm

8.78 ± 2.29

4.62 ± 2.49

< 0.001

  PDH, mm

5.48 ± 1.54

3.40 ± 1.63

< 0.001

Final static view

   

 Segmental angle, o

10.65 ± 5.27

12.43 ± 5.21

0.279

 Intradiscal angle, o

9.14 ± 6.64

2.51 ± 2.23

0.095

  Slippage, mm

6.97 ± 2.70

9.94 ± 4.15

0.008

  ADH, mm

7.37 ± 2.75

4.25 ± 1.75

< 0.001

  PDH, mm

4.62 ± 1.35

3.36 ± 1.60

0.009

Dynamic segmental angle change, o

9.74 ± 4.74

1.65 ± 5.29

< 0.001

Dynamic intradiscal angle change, o

6.92 ± 3.41

1.82 ± 4.46

< 0.001

Dynamic slippage change, mm

3.91 ± 1.53

0.73 ± 2.87

<0.001

Preoperative segmental kyphosis, n (%)

2 (9.1)

0 (0)

0.167

Preoperative intradiscal kyphosis, n (%)

3 (13.6)

2 (10)

0.716

Preoperative flexion segmental kyphosis, n (%)

5 (22.7)

1 (5)

0.101

Preoperative flexion intradiscal kyphosis, n (%)

11 (50)

5 (25)

0.096

Dynamic segmental lordotic change over 10°, n (%)

8 (36.6)

3 (15)

0.246

Dynamic intradiscal lordotic change over 10°, n (%)

3 (13.6)

0 (0)

0.230

Dynamic slippage change over 4 mm, n (%)

8 (36.4)

3 (15)

0.246

  1. Data are presented as mean ± SD unless noted otherwise. Dynamic segmental angle change = preoperative extension segmental angle – preoperative flexion segmental angle; dynamic intradiscal angle change = preoperative extension intradiscal angle – preoperative flexion intradiscal angle; dynamic slippage change = preoperative flexion slippage – preoperative extension slippage. Abbreviations: ADH anterior disc height, PDH posterior disc height.
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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