Table 3 Relationship between preoperative disc and facet joint status and disc degeneration
| Â | L4/5 | L5S1 | ||||||
|---|---|---|---|---|---|---|---|---|
DHI decrease ≥ 10% (n) | DHI decrease < 10% (n) | F value | p value | DHI decrease ≥ 10% (n) | DHI decrease < 10% (n) | F value | p value | |
Facet grade pre-operation | Â | Â | 0.000 | 1.000 | Â | Â | 4.934 | 0.026* |
Degeneration | 8 | 32 | Â | Â | 9 | 34 | Â | Â |
No degeneration | 3 | 11 | Â | Â | 6 | 5 | Â | Â |
Disc grade pre-operation | Â | Â | 0.002* | 0.964 | Â | Â | 0.006 | 0.937 |
Degeneration | 8 | 34 | Â | Â | 12 | 29 | Â | Â |
No degeneration | 3 | 9 | Â | Â | 3 | 10 | Â | Â |