Table 5.
Patient demographics and radiographic measurements in each grade of increased signal intensity on sagittal T2-weighted magnetic resonance imaging
| Variable | Grade 0 | Grade 1 | Grade 2 | p-value |
|---|---|---|---|---|
| No. of patients | < 0.001* | |||
| M group | 45 (54.9) | 63 (90.0) | 10 (90.1) | |
| WM group | 37 (45.1) | 7 (10.0) | 1 (9.1) | |
| Age (yr) | 65.5 ± 11.5 | 67.3 ± 10.5 | 65.5 ± 8.7 | 0.596 |
| Sex | ||||
| Male:female | 52 (49.5):30 (51.7) | 49 (46.7):21 (36.2) | 4 (3.8):7 (12.1) | 0.092 |
| BMI (kg/m2) | 25.9 ± 4.6 | 24.6 ± 3.9 | 26.0 ± 5.1 | 0.283 |
| JOA score | 14.7 ± 2.9 | 12.8 ± 3.2 | 10.7 ± 3.8 | < 0.001* |
| (C2–7) Cobb angle (°) | 13.0 ± 10.5 | 12.4 ± 8.9 | 10.2 ± 8.8 | 0.651 |
| Minimal SAC (mm) | 6.3 ± 1.8 | 5.0 ± 1.5 | 4.5 ± 2.2 | < 0.001* |
| Maximum occupation ratio (%) | 44.1 ± 12.7 | 53.8 ± 13.3 | 58.6 ± 16.2 | < 0.001* |
| Minimum axial bone space (mm2) | 176.3 ± 43.7 | 150.1 ± 32.5 | 148.1 ± 33.0 | < 0.001* |
| Total ROM (°) | 30.5 ± 14.6 | 25.9 ± 13.7 | 32.8 ± 15.7 | 0.092 |
| Local ROM (°) | 6.4 ± 4.1 | 5.8 ± 4.7 | 6.9 ± 4.1 | 0.560 |
Values are presented as number (%) or mean±standard deviation.
M Group, myelopathy group; WM Group, without myelopathy group; BMI, body mass index; JOA, Japanese Orthopaedic Association; SAC, space available for the spinal cord; ROM, range of motion.
*
p < 0.05, statistically significant differences.