Table 3.

Complications and side effects.

Patient number	Levels (mean)	Dysaesthesia	Motor deficit	Reoperation	Subsidence	Cage breakage	Bowel injury
1–10	1.1	3	1	1	0	0	0
11–20	1.3	2	0	0	2	0	0
21–30	1.5	0	0	1	2	1	1
Totals	42	5	1	2	4	1	1