Table 3.
Reference values for vertebral parameters (mean ± 2 standard deviation)
| Levels | Superior endplate inclination (deg) | Vertebral wedging (deg) | Levels | Posterior disc height (mm) | Posterior disc/vertebra height ratio (%) | Sagittal listhesis (%) | Levels | Fused segment lordosis (deg) |
|---|---|---|---|---|---|---|---|---|
| S1 | 40 ± 14 | 10 ± 10 | L5S1 | 6 ± 4 | 22 ± 12 | 0 ± 4 | L5S1 | 57 ± 18 |
| L5 | 19 ± 16 | 9 ± 6 | L4L5 | 7 ± 4 | 23 ± 14 | −1 ± 4 | L4S1 | 46 ± 18 |
| L4 | 3 ± 16 | 4 ± 6 | L3L4 | 7 ± 4 | 23 ± 10 | −1 ± 2 | L3S1 | 31 ± 16 |
| L3 | −8 ± 14 | 3 ± 6 | L2L3 | 7 ± 2 | 23 ± 10 | −1 ± 2 | ||
| L2 | −14 ± 12 | 1 ± 6 | L1L2 | 7 ± 2 | 22 ± 10 | −1 ± 2 | ||
| L1 | −16 ± 12 | −1 ± 3 |