Table 2.

Overall of operation options

Operative options	Number
Fusion levels (OLIF)	138
1 Level	2
2 Levels	4
3 Levels	32
4 Levels	8
Fusion site (OLIF)
L1–2	7
L2–3	45
L3–4	44
L4–5	35
L5–S1	7
Posterior surgery
Ponte osteotomy	20
Pedicle subtraction osteotomy	26