| Index surgery | Lengthening surgery | P for trend | |||
---|---|---|---|---|---|---|
1st–3rd | 4th–6th | 7th–9th | ≥ 10th | |||
No. of surgeries | 31 | 167 | 133 | 85 | 39 | - |
No. of IFs (%) | 2 (6.5) | 12 (7.2) | 2 (1.5) | 2 (2.4) | 0 (0) | 0.01* |
No. of anchor loosenings/dislocations (%) | 2 (6.5) | 8 (4.8) | 1 (0.8) | 0 (0) | 0 (0) | < 0.01* |
No. of rod breakages (%) | 0 (0) | 1 (0.6) | 0 (0) | 2 (2.4) | 0 (0) | 0.55 |
No. of implant protrusions (%) | 0 (0) | 2 (1.2) | 1 (0.8) | 0 (0) | 0 (0) | 0.24 |
No. of proximal junctional kyphoses (%) | 0 (0) | 1 (0.6) | 0 (0) | 0 (0) | 0 (0) | 0.31 |