Table 2.
Imaging findings of study groups
| Study Group | Group 1 (Critical DSS) | Group 2 (Relative DSS) | Group 3 (Non-DSS) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Levels | L4 | L5 | L1 | L2 | L3 | L4 | L5 | L4 | L5 |
| Mean Spinal Canal Diameter (mm (±SD)) | 13.1 (1.2) | 12.9 (0.5) | 16.5 | 14.2 (1.0) | 15.2 (1.5) | 15.5 (0.8) | 15.2 (0.4) | 23.3 | 17.7 (1.8) |
| Levels | L4-L5 | L5-S1 | L1-L2 | L2-L3 | L3-L4 | L4-L5 | L5-S1 | L4-L5 | L5-S1 |
| Mean LF thickness (mm (±SD)) | R: 4.4 (1.6) | R: 3.3 (1.8) | R: 6.1 | R: 4.8 (1.8) | R: 4.0 (1.8) | R: 3.5 (1.6) | R: 4.5 (1.7) | R: 4.2 | R: 3.0 (0.3) |
| L: 4.6 (1.9) | L:3.4 (1.5) | L: 2.5 | L: 4.3 (1.5) | L: 4.1 (1.8) | L: 4.3 (2.1) | L: 3.5 (1.2) | L: 5.3 | L: 3.2 (0.4) | |
| Mean Fibrosis Area (% (±SD)) | R: 48.6 (25.5) | R: 38.5 (16.2) | R: 15.3 | R: 33.9 (17.8) | R: 52.6 (20.6) | R: 47.4 (17.8) | R: 41.8 (19.2) | R: 72.6 | R: 59.5 (22.2) |
| L: 57.7 (18.2) | L: 57.9 (6.4) | L: 15.3 | L: 70.0 (5.4) | L: 52.8 (24.9) | L: 43.5 (16.9) | L: 48.9 (29.4) | L: 66.5 | L: 52.7 (27.1) | |
LF ligamentum flavum, SD standard deviation; %: percentage, R right, L left