Table 1 Summary of the Weiner classification system
Degeneration | Disc height | Spur formation | Listhesis | |
|---|---|---|---|---|
Grade 0 | none | normal | none | none |
Grade 1 | mild | < 25% narrowing | small | none |
Grade 2 | moderate | 25–75% narrowing | moderate | 3-5 mm |
Grade 3 | advanced/high | > 75% narrowing | large | > 5 mm |