Skip to main content

Table 2 Radiography Factors and Univariate Analysis of Increased Spinal Cord Area

From: Multivariate analysis of factors associated with spinal cord area in single-door cervical laminoplasty with miniplate fixation

 

Total

SAI

MAI

LAI

P value

Open angle, °

39.78 ± 4.2

40.3 ± 4.5

39.6 ± 4.2

39.1 ± 3.5

0.647

Door shaft position, N (%)

    

0.008

 Wide opening

38

11 (28.9)

12 (31.6)

15 (39.5)

 

 Narrow opening

45

23 (51.1)

17 (37.8)

5 (11.1)

 

The SCD, cm

 Preop

1.64 ± 0.15

1.64 ± 0.16

1.67 ± 0.11

1.62 ± 0.16

0.497

 Postop

2.51 ± 0.17

2.48 ± 0.20

2.53 ± 0.17

2.52 ± 0.12

0.528

 The change

0.87 ± 0.18

0.85 ± 0.21

0.86 ± 0.13

0.90 ± 0.18

0.550

C2–7 Cobb angle, °

 Preop

12.2 ± 8.6

13.4 ± 9.2

10.6 ± 7.9

12.5 ± 8.5

0.436

 Postop

11.2 ± 8.7

12.4 ± 9.4

10.4 ± 8.5

10.5 ± 8.0

0.677

 The change

−1.0 ± 7.7

−1.2 ± 9.4

−0.2 ± 7.2

−1.8 ± 5.1

0.767

CCI

 Preop

0.09 ± 0.10

0.09 ± 0.11

0.08 ± 0.10

0.09 ± 0.08

0.841

 Postop

0.08 ± 0.10

0.09 ± 0.09

0.07 ± 0.13

0.08 ± 0.09

0.847

 The change

−0.01 ± 0.07

−0.01 ± 0.07

− 0.01 ± 0.08

− 0.01 ± 0.06

0.970

Spinal canal area, mm2

 Preop

191 ± 33

177 ± 30

203 ± 34

199 ± 29

0.004

 Postop

337 ± 46

321 ± 38

353 ± 53

343 ± 37

0.015

 The change

146 ± 29

143 ± 28

150 ± 30

145 ± 29

0.678

ROM, °

 Preop

43.7 ± 11.6

42.9 ± 11.7

45.5 ± 11.0

42.4 ± 12.6

0.907

 Postop

30.8 ± 11.2

31.0 ± 10.9

33.1 ± 10.5

27.1 ± 12.3

0.176

 The change

−12.9 ± 9.7

−11.9 ± 10.2

−12.3 ± 10.0

−15.3 ± 8.4

0.299

  1. SAI Small spinal cord area increment, MAI Middle spinal cord area increment, LAI Large spinal cord area increment, SCD sagittal canal diameter, CCI cervical curvature index, ROM range of motion
  2. P < 0.05 compared to the preoperative data