Intervertebral disc height in mm for each grade of disc degeneration | ||||||
---|---|---|---|---|---|---|
2 | 3 | 4 | 5 | P a | P b | |
L1/2 | 10.1 (0.2) | 8.9 (0.3) | 9.0 (1.0) | 3.0 (1.4) | <0.001 | 0.01 |
L2/3 | 12.0 (0.3) | 10.5 (0.3) | 9.3 (0.6) | - | 0.001 | 0.001 |
L3/4 | 13.2 (0.4) | 11.4 (0.3) | 10.1 (0.6) | 5.1 (2.0) | <0.001 | 0.001 |
L4/5 | 13.2 (0.7) | 11.5 (0.4) | 10.3 (0.5) | 4.2 (2.4) | 0.003 | 0.02 |
L5/S1 | 11.4 (0.6) | 10.5 (0.6) | 9.0 (0.6) | 4.3 (1.5) | <0.001 | 0.03 |