Table 1 Grading analysis of preoperative facet joint arthropathy based on Weishaupt’s classification.
Facet joint arthropathy | Grade 0 | Grade 1 | Grade 2 | Grade 3 | p value | Mean score | p value |
|---|---|---|---|---|---|---|---|
Total | 5 (0.6) | 391 (44.4) | 287 (32.6) | 197 (22.4) | 1.77 ± 0.80 | ||
Facet joint level | < 0.001* | < 0.001§ | |||||
L1-2 | 2 (1.1) | 108 (61.4) | 57 (32.4) | 9 (5.1) | 1.41 ± 0.61 | ||
L2-3 | 1 (0.6) | 88 (50.0) | 72 (40.9) | 15 (8.5) | 1.57 ± 0.65 | ||
L3-4 | 0 | 65 (36.9) | 66 (37.5) | 45 (25.6) | 1.89 ± 0.78 | ||
L4-5 | 0 | 29 (16.5) | 46 (26.1) | 101 (57.4) | 2.41 ± 0.76 | ||
L5-S1 | 2 (1.1) | 101 (57.4) | 46 (26.1) | 27 (15.3) | 1.56 ± 0.76 | ||
Side | 0.882 | 0.787 | |||||
Right | 2 (0.5) | 196 (44.5) | 140 (31.8) | 102 (23.2) | 1.78 ± 0.80 | ||
Left | 3 (0.7) | 195 (44.3) | 147 (33.4) | 95 (21.6) | 1.76 ± 0.79 |
