Flexible Stabilisation of the Degenerative Lumbar Spine Using PEEK Rods

Table 2

Degenerative status of adjacent discs (above and below) at the final evaluation and compared to the initial status.

Characteristics	Lower level; (%)	Upper level; (%)
Degeneration on last evaluation
None	14 (73.7)	15 (79.0)
Doubtful	0	0
Minimal	3 (15.8)	3 (15.8)
Moderate	1 (5.3)	0
Severe	1 (5.3)	1 (5.3)
Missing	2	2
Evolution
Absent initially and from last evaluation	12 (70.6)	13 (68.4)
Present initially and in last evaluation	5 (29.4)	2 (10.5)
Absent initially and present in last evaluation	0	2 (10.5)
Present initially and absent from last evaluation	0	2 (10.5)
Missing	4	2