Table 1
Demographic data
Sex
Age (y)
Level
n
Dynamic stabilization
2 men and 2 women
63.5 ± 11.3
L2-3-4
1
L4-5
2
L4-5–S1
1
PLF
2 men and 2 women
64.8 ± 8.3
L2-3-4
1
L3-4-5
2
L4-5
1
Discectomy
4 men and 4 women
42.8 ± 6.2
L4-5
2
L5-S1
6