Table 2.
Baseline data of patients
| No. patients with IPD(s) | Age (years) | Male/female | Complaint duration (months) | Levelsa | No. levelsb | No. IPDs | Size of IPD(s) |
|---|---|---|---|---|---|---|---|
| 156 | 64.8 (range 19–84) | 78/78 (50.0 %/50.0 %) | 40.0 (range 0.8–477) | L1–L2: 0.6 % (1 pt) | 1 level: 46.1 % (72 pts) | 250 | 8 mm: 6.4 % (16 pts) |
| L2–L3: 9.6 % (15 pts) | 2 levels: 47.4 % (74 pts) | 10 mm: 24.8 % (62 pts) | |||||
| L3–L4: 58.6 % (92 pts) | 3 levels: 6.4 % (10 pts) | 12 mm: 39.2 % (98 pts) | |||||
| L4–L5: 93.6 % (147 pts) | 14 mm: 29.6 % (74 pts) |
aLevels of lumbar spinal stenosis at study entry
bNumber of levels at which patients had the IPD implanted