Case

Age at surgery　(years)

Gender

Range of fusion

Laminectomy　 or Laminoplasty

Preoperative　 Frankel grade

Postoperative　 Frankel grade

1

53

M

C4-6

C5

C

D

2

62

M

C5-6

C5-6

C

D

3

36

M

C4-7

C4-7

A

A

4

62

M

C6-7

N

C

D

5

58

M

C6-7

N

C

D

6

62

M

C6-7

C6

A

A

7

58

F

C6-Th1

N

C

E

8

20

M

C5-6

N

C

E

9

64

M

C3-4

C3-6

B

D

10

45

M

C4-5

C4

D

D

11

55

F

C4-5

N

D

E

12

55

M

C5-6

C5-6

D

E

13

68

F

C5-6

N

D

D

14

43

M

C5-7

C3-7

D

E

15

75

F

C6-7

C3-7

A

B

16

78

M

C5-7

N

D

D

17

80

M

C4-5

N

D

E

18

55

F

C5-Th1

N

C

D

19

35

M

C6-Th2

C7

B

B

Mean

56.0