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The average differences of the spinal canal’s cross-sectional area, SCcsa between unloaded and axially loaded spines
| Vertebral level | N | SCcsa unloaded (mm2) | SCcsa loaded (mm2) | Difference (mm2) | Relative difference (%) | Significance |
|---|---|---|---|---|---|---|
| L3/L4 | 23 | 234 | 211 | −23 | −10 | 0.000 |
| L4/L5 | 24 | 222 | 205 | −17 | −9 | 0.000 |
