Table 5 Risk factors of poor prognosis of C5 palsy.

Male n, (%)

15 (71.4%)

4 (80.0%)

1

Age

60.5 ± 11.7

74.0 ± 9.0

0.023*

BMI

26.7 ± 4.2

23.6 ± 1.1

0.116

Duration (mo.)

39.5 ± 41.1

13.2 ± 9.2

0.174

Comorbidity n, (%)

15 (76.2%)

4 (80.0%)

1

pre-Op JOA score

10.6 ± 2.8

10.4 ± 3.1

0.880

Radiological findings

 Occupation ratio (%)

49.1 ± 16.6

52.2 ± 15.5

0.711

 C2-7 ROM (deg.)

25.1 ± 12.8

23.1 ± 16.4

0.768

 C2-7 angle (deg.)

5.8 ± 11.4

11.9 ± 14.4

0.315

 Kline(-) n, (%)

7 (33%)

1 (20%)

1

 MRI T2 HIZ n, (%)

17 (81.0%)

5 (100%)

0.555

Most stenotic level

 C3/4

10

2

1

 C4/5

5

1

1

 C5/6

3

0

1

Surgery

 Procedure

  ADF

4

0

0.555

  LAM

8

3

0.620

  PDF

9

2

1

 Number of operated segments

4.0 ± 0.97

4.6 ± 0.89

0.23

 Surgery involved level

  C3/4

18

5

1

  C4/5

21

5

-

  C5/6

17

5

0.555