Study demographics
| Kineflex Disc | Charité device | |
|---|---|---|
| No. of subjects | 33 | 31 |
| Male | 15 | 13 |
| Female | 18 | 18 |
| Age [mean (SD)] (y) | 40.1 (10.01) | 40.8 (7.68) |
| Body mass index [mean (SD)] | 26.6 (3.39) | 26.0 (3.40) |
| Current or former smoker | 17 (51.5%) | 20 (64.5%) |
| Surgery level L4–5 | 6 (18%) | 4 (12.9%) |
| Surgery level L5-S1 | 27 (81.8%) | 27 (87.1%) |