Table 4. Spinal canal width in males and females.
| Variable | Mean (SD) | P value | |
|---|---|---|---|
| Males (N=540) | Females (N=540) | ||
| L1 | 20.87 (2.50) | 19.83 (2.16) | <0.0001 |
| L2 | 21.19 (2.62) | 20.13 (2.28) | <0.0001 |
| L3 | 22.13 (2.70) | 20.96 (2.35) | <0.0001 |
| L4 | 24.55 (3.24) | 22.95 (2.90) | <0.0001 |
| L5 | 29.55 (4.25) | 27.41 (3.69) | <0.0001 |
| L1–L5 | 23.66 (2.59) | 22.26 (2.25) | <0.0001 |
Spinal canal width. Mean transverse diameter (width) of the spinal canal in males and females at each level from L1 to L5 and overall for L1–L5. All statistically significant differences are bolded. SD, standard deviation; CSA, cross-sectional area.