| Pfirrmann L3–4 | Pfirrmann L4–5 | Pfirrmann L5–S1 |
---|---|---|---|
Mid-sagittal AP diameter of dural sac | |||
 rs | 0.020 | − 0.193 | 0.000 |
 p | 0.888 | 0.180 | 1.000 |
Cross-sectional area of dural sac | |||
 rs | − 0.527 | − 0.670 | − 0.333 |
 p |  < 0.001* |  < 0.001* | 0.018* |
Degree of the dural sac compression at disc level (%) | |||
 rs | − 0.668 | − 0.620 | − 0.486 |
 p |  < 0.001* |  < 0.001* |  < 0.001* |
Central spinal canal grading | |||
 rs | 0.684 | 0.612 | 0.473 |
 p |  < 0.001* |  < 0.001* | 0.001* |
Rt. LSC | |||
 rs | − 0.576 | − 0.605 | − 0.619 |
 p |  < 0.001* |  < 0.001* |  < 0.001* |
Grade of Rt. LSC | |||
 rs | 0.643 | 0.602 | 0.675 |
 p |  < 0.001* |  < 0.001* |  < 0.001* |
Lt. LSC | |||
 rs | − 0.564 | − 0.554 | − 0.539 |
 p |  < 0.001* |  < 0.001* |  < 0.001* |
Grade of Lt. LSC | |||
 rs | 0.651 | 0.642 | 0.557 |
 p |  < 0.001* |  < 0.001* |  < 0.001* |
Diameter of Rt. intervertebral foramen | |||
 rs | − 0.457 | − 0.610 | − 0.576 |
 p | 0.001* |  < 0.001* |  < 0.001* |
Grade of Rt. lumbar foraminal stenosis | |||
 rs | 0.392 | 0.652 | 0.475 |
 p | 0.005* |  < 0.001* |  < 0.001* |
Diameter of Lt. intervertebral foramen | |||
 rs | − 0.327 | − 0.529 | − 0.560 |
 p | 0.020* |  < 0.001* |  < 0.001* |
Grade of Lt. lumbar foraminal stenosis | |||
 rs | 0.382 | 0.550 | 0.536 |
 p | 0.006* |  < 0.001* |  < 0.001* |