Table 5 Surgery outcomes of patients divided by axial ossification type and sagittal ossification type

JOA score

Preop JOA score, mean ± SD

6.11 ± 2.22

6.92 ± 1.22

6.63 ± 1.77

0.430

6.03 ± 1.84

6.95 ± 1.59

0.710

Postop JOA score, mean ± SD

7.93 ± 2.29

8.83 ± 1.06

8.50 ± 1.75

0.342

7.74 ± 1.91

8.93 ± 1.43

0.017*

P

 < 0.001*

 < 0.001*

 < 0.001*

–

 < 0.001*

 < 0.001*

–

RR, mean ± SD, %

44.63 ± 22.70

47.88 ± 19.40

48.91 ± 30.27

0.884

38.27 ± 18.52

53.18 ± 25.55

0.034*

Hematoma, no. (%)

0

0

0

…

0(0)

0(0)

…

CSF leakage, no. (%)

1(7.1)

2(11.1)

2(12.5)

0.773

2(10.5)

3(10.3)

1.000

Immediate neurologic deterioration, no. (%)

0(0)

2(11.1)

1(6.25)

0.767

0(0)

3(10.3)

0.267

Superficial infection, no. (%)

1(7.1)

1(5.6)

0(0)

0.745

1(5.3)

1(3.4)

1.000

Deep infection, no. (%)

0(0)

0(0)

0(0)

–

0(0)

0(0)

–