Table 2 Demographic characteristic of the patients

Age

49.47 ± 19.35

48.83 ± 12.31

52.56 ± 15.97

Sex

    Male

8

6

8

    Female

7

6

8

Level

    T11

0

0

0

    T12

2

4

5

    L1

11

5

6

    L2

2

3

5

Osteoporosis

3

2

3

Load sharing score

    4

2

0

0

    5

0

1

1

    6

1

5

5

    7

4

2

4

    8

6

2

5

    9

2

2

1

Load sharing score

    ≤ 6

3

6

6

    ≥ 7

12

6

10

Neurological status(preoperative)

    A

0

0

1

    B

0

1

0

    C

3

1

2

    D

12

10

13

Neurological status(postoperative)

    B

0

0

1

    C

0

1

0

    D

5

1

4

    E

10

10

11

Surgical duration

159.93 ± 56.06

237.5 ± 79.92

301.56 ± 80.42

HSS < IS, LS

Volume of blood loss (mL)

219.00 ± 232.73

331.25 ± 237.41

684.38 ± 483.35

LS > IS, HSS

Follow-up (months)

11.93 ± 17.63

10.00 ± 5.13

11.75 ± 10.74