| Whole group | OLIF51 group | TLIF51 group |
---|---|---|---|
Number of PJK | 7 (30.4%) | 4 (31.0%) | 3 (30.0%) |
Onset (postop months) | 16.1 ± 10.0 | 8.6 ± 1.9 (7–10)*** | 26.3 ± 4.7 (21–30) |
 Cause of PJK | |||
  Adjacent fracture | 7 | 4 | 3 |
  Screw loosening | 3 | 2 | 1 |
 Management | |||
  Revision surgery | 2 | 1 | 1 |
  Vertebroplasty | 4 | 2 | 2 |