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The average difference in the ligamentum flavum’s cross-sectional area (LFcsa) at the right (dx) and left (sin) sides in the unloaded (ul) and axially loaded (load) subjects
| Vertebral level | N | LFcsa dx ul (mm2) | LFcsa dx load (mm2) | Difference (mm2) | Relative difference (%) | LFcsa sin ul (mm2) | LFcsa sin load (mm2) | Difference (mm2) | Relative difference (%) |
|---|---|---|---|---|---|---|---|---|---|
| L3/L4 | 23 | 64.9 | 73.8 | 8.9 | 14 | 73.4 | 76.1 | 2.7 | 3 |
| L4/L5 | 24 | 73.9 | 86.8 | 12.9 | 17 | 80.2 | 81.8 | 1.6 | 2 |
| All levels | 50 | 68.9 | 79.6 | 10.7 | 16 | 76.2 | 78.5 | 2.3 | 3 |
