Table 2.
Factors associated with VAS.
| Associated Factor | Change in VAS | p-Value | % Change in VAS | p-Value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number of the Target Disc | One | Two | One | Two | ||||||
| 5.1 (2.3) | 2.9 (3.5) | 0.31 | 84.1 (12.8) | 43.3 (53.1) | <0.05 | |||||
| MRI grade | G4 | G5 | G6 | G4 | G5 | G6 | ||||
| 4.5 (2.7) | 2.6 (3.9) | 6.3 (2.8) | 0.46 | 67.3 (40.8) | 75.8 (4.7) | 86.4 (19.2) | 0.8 | |||
| Modic change | - | + | - | + | ||||||
| 4.2 (3.0) | 6.0 (0.9) | 0.16 | 67.1 (6.0) | 95.7 (3.9) | <0.05 | |||||
| Disc bulge | - | + | - | + | ||||||
| 4.7 (3.4) | 4.3 (2.7) | 0.86 | 69.2 (49.2 | 72.6 (29.8 | 0.91 | |||||
| Anterior HIZ | - | + | - | + | ||||||
| 5.3 (2.5) | 2.5 (3.1) | 0.18 | 77.3 (31.7) | 58.5 (42.3) | 0.46 | |||||
| Posterior HIZ | - | + | - | + | ||||||
| 6.4 (3.8) | 3.8 (2.9) | <0.05 | 96.1 (5.5) | 64.2 (36.5) | <0.05 | |||||
| Group | CS | PRPr | CS | PRPr | ||||||
| 3.0 (2.9) | 5.3 (2.5) | 0.18 | 61.0 (37.9) | 78.2 (33.2) | 0.42 | |||||
Change (Baseline − Post 12 M) and % change ([baseline − Post 12 M]/baseline × 100) in visual analog scale (VAS) of each associated factor are shown. MRI grade was evaluated by modified Pfirrmann [11] grading system. HIZ: high-intensity zone. Number in parentheses indicates standard deviation (SD).