Comparison of CT Grading of Degenerative Facet Joint and Disk Disease Combined and PET Grading (per Spinal Level)
| Maximal combined facet and disk joint disease grade per CT | Mean PET grade ± SD | Mann–Whitney test |
|---|---|---|
| 0 | 0.38 ± 0.87 (n = 104) | |
| 1 | 0.49 ± 0.97 (n = 110) | CT grade 1 vs. 0: P = 0.3914 |
| 2 | 0.71 ± 1.16 (n = 173) | CT grade 2 vs. 0: P = 0.0333 |
| 3 | 1.38 ± 1.55 (n = 63) | CT grade 3 vs. 0: P = 0.0001 |