Table 5.

Preoperative and postoperative NDI scores and the net change in these three groups.

NDI scores	Preop	Postop	Change	p value
Maintained Group	42.8	30.8	12	0.004
Restored Group	50.4	19.4	31	0.007
Kyphotic Group	46.3	32.6	13.7	0.114