Table 2 Comparison of spinopelvic parameters between the IS and S2AI groups
Parameter | IS | S2AI | p |
|---|---|---|---|
SVA (mm) | |||
 Preop | 155.5 ± 55.3 | 139.3 ± 41.9 | 0.133 |
 Postop | 20.9 ± 33.5 | 32.2 ± 30.4 | 0.093 |
 Last follow-up | 46.8 ± 51.0 | 67.2 ± 69.0 | 0.07 |
 Change | − 134.6 ± 49.3 | − 107.1 ± 55.3 | 0.005 |
TK (°) | |||
 Preop | 7.1 ± 12.2 | 8.1 ± 12.0 | 0.686 |
 Postop | 26.9 ± 8.1 | 24.1 ± 10.9 | 0.119 |
 Last follow-up | 29.6 ± 9.9 | 27.0 ± 11.2 | 0.211 |
 Change | 19.8 ± 10.3 | 16.0 ± 12.0 | 0.082 |
PT (°) | |||
 Preop | 37.1 ± 8.7 | 38.3 ± 10.1 | 0.514 |
 Postop | 17.4 ± 7.2 | 26.2 ± 8.5 | < 0.001 |
 Last follow-up | 20.3 ± 7.6 | 27.7 ± 8.9 | < 0.001 |
 Change | −19.7 ± 11.9 | −12.1 ± 8.9 | < 0.001 |
PI (°) | |||
 Preop | 54.8 ± 9.5 | 56.8 ± 11.4 | 0.324 |
 Postop | 56.1 ± 8.4 | 56.2 ± 10.9 | 0.956 |
 Last follow-up | 55.9 ± 10.6 | 56.6 ± 9.7 | 0.741 |
 Change | 1.3 ± 4.3 | −0.6 ± 7.3 | 0.069 |
LL (°) | |||
 Preop | 11.4 ± 23.9 | 12.1 ± 5.3 | 0.872 |
 Postop | −54.2 ± 10.0 | −42.3 ± 7.8 | < 0.001 |
 Last follow-up | −51.7 ± 13.8 | −39.5 ± 8.1 | < 0.001 |
 Change | −65.6 ± 26.0 | − 54.4 ± 17.9 | 0.028 |
ULL (°) | |||
 Preop | 7.1 ± 8.4 | 6.6 ± 11.9 | 0.791 |
 Postop | −32.7 ± 9.7 | −23.7 ± 9.3 | < 0.001 |
 Last follow-up | −29.9 ± 8.6 | −21.3 ± 10.4 | < 0.001 |
 Change | − 39.8 ± 13.8 | − 30.3 ± 9.9 | < 0.001 |
LLL (°) | |||
 Preop | 4.3 ± 7.1 | 5.5 ± 9.9 | 0.449 |
 Postop | − 21.5 ± 10.4 | −18.6 ± 10.8 | 0.176 |
 Last follow-up | −18.8 ± 9.7 | −18.2 ± 9.4 | 0.760 |
 Change | −25.8 ± 19.9 | −24.1 ± 13.5 | 0.655 |