Table 6 Summary of all involved facet joints degeneration class by Weishaupt’s criteria
Pathria’s criteria | FAPS | MPPS | P Value | |||||
|---|---|---|---|---|---|---|---|---|
n (cranial) = 154 | n (caudal) = 154 | n (FAPS) = 308 | n (cranial) = 224 | n (caudal) = 224 | n (MPPS) = 448 | |||
Pre-op | Class 0 | 51 | 45 | 96 | 77 | 70 | 147 | 0.635 |
Class 1 | 103 | 109 | 212 | 147 | 154 | 301 | ||
AC | 0.67 | 0.71 | 0.69 | 0.66 | 0.69 | 0.67 | / | |
12–18 months post-op | Class 0 | 7 | 12 | 19 | 39 | 43 | 82 | 0.000 |
Class 1 | 18 | 71 | 89 | 101 | 142 | 243 | ||
Class 2 | 73 | 47 | 120 | 57 | 25 | 82 | ||
Class 3 | 56 | 24 | 80 | 27 | 14 | 41 | ||
AC | 2.16 | 1.54 | 1.85 | 1.32 | 1.04 | 1.18 | / | |
△AC | 1.49 | 0.83 | 1.16 | 0.66 | 0.35 | 0.51 | / | |