From: Proximal junctional kyphosis in Lenke 5 AIS patients: the important factor of pelvic incidence
High PI (≥45°) n=38 | Non-PJK Group n=32 | PJK Group n=6 | p |
---|---|---|---|
PI | 52.5±7.6 | 53.4±4.9 | 0.779 |
SS | |||
 Preoperative | 41.6±6.4 | 45.7±7.7 | 0.169 |
Postoperative | 40.1±6.4 | 38.2±7.0 | 0.524 |
 Final | 41.0±6.0 | 40.7±6.4 | 0.912 |
PT | |||
 Preoperative | 10.9±5.1 | 7.7±9.6 | 0.461 |
 Postoperative | 12.5±5.9 | 14.5±8.7 | 0.482 |
 Final | 11.5±5.1 | 12.7±6.2 | 0.604 |
LL | |||
 Preoperative | 53.2±9.0 | 60.3±11.7 | 0.098 |
 Postoperative | 52.8±8.9 | 59.5±8.9 | 0.086 |
 Final | 55.3±8.6 | 63.8±8.3 | 0.003 |
 Δ LL (post-pre) | -0.4±7.9 | -0.7±15.2 | 0.927 |
 Δ LL (final-pre) | 2.1±8.1 | 3.4±14.4 | 0.756 |
GTK (T1-12) | |||
 Preoperative | 27.6±12.2 | 32.2±11.1 | 0.394 |
 Postoperative | 28.3±12.7 | 36.4±7.0 | 0.143 |
 Final | 35.4±12.7 | 44.4±13.5 | 0.030 |
 Δ T1-12 (post-pre) | 0.7±7.9 | 4.20±7.31 | 0.337 |
 ΔT1-12 (final-pre) | 7.8±8.3 | 12.1±15.7 | 0.061 |
TK (T5-12) | |||
 Preoperative | 19.0±8.5 | 24.3±6.6 | 0.163 |
 Postoperative | 17.8±8.9 | 22.2±3.9 | 0.036 |
 Final | 28.8±10.1 | 35.8±19.3 | 0.012 |
 Δ T5-12 (post-pre) | -1.2±7.6 | -2.1±7.7 | 0.409 |
 ΔT5-12 (final-pre) | 9.8±9.7 | 11.5±19.7 | 0.336 |
SVA (mm) | |||
 Preoperative | -4.5±22.9 | -0.7±37.1 | 0.732 |
 Postoperative | -9.5±20.5 | -10.1±22.5 | 0.946 |
 Final | -7.6±27.6 | -14.9±28.6 | 0.555 |
PJA | |||
 Preoperative | 9.4±4.5 | 8.3±3.0 | 0.568 |
 Postoperative | 9.8±5.6 | 15.2±5.5 | 0.036 |
 Final | 13.1±5.3 | 25.3±7.5 | <0.001 |
 Δ PJA (final-pre) | 3.6±3.8 | 17.0±8.0 | <0.001 |
PI-LL | |||
 Preoperative | -0.7±8.6 | -6.9±11.7 | 0.135 |
 Postoperative | -0.2±6.6 | -6.8±11.3 | 0.220 |
 Final | -2.9±8.5 | -10.4±9.2 | 0.058 |
UIV | Â | Â | 0.038 |
 UIV above apex of TK | 11 | 5 |  |
 UIV below apex of TK | 21 | 1 |  |