Disc degeneration at the intervertebral levels with facet fluid width over and under the cutoff valuea
| Classification of Pfirrmann et al26 for Disc Degeneration | Facet Fluid Width | |
|---|---|---|
| Over the Cutoff Value (n = 41) | Under the Cutoff Value (n = 52) | |
| Grade 3 | 10 (24%) | 9 (17%) |
| Grade 4 | 22 (54%) | 26 (50%) |
| Grade 5 | 9 (22%) | 17 (33%) |
↵a No intervertebral level was classified as grade 1 or 2. Values are the number of intervertebral levels and percentages. There is no significant difference (χ2 test, P =.46).