Table 4 Radiological parameters
Parameter | Two-stage PAP surgery (N = 12) | Single-stage AP surgery (N = 16) | P value* |
|---|---|---|---|
Preoperative | |||
TK (°) | 15.3 ± 10.0 | 17.6 ± 12.3 | 0.612 |
LL (°) | 1.0 ± 12.6 | 16.4 ± 14.5 | 0.007 |
PT (°) | 38.9 ± 10.2 | 32.4 ± 6.5 | 0.048 |
PI (°) | 49.3 ± 8.1 | 51.1 ± 7.8 | 0.574 |
PI–LL (°) | 44.8 ± 13.2 | 33.3 ± 15.7 | 0.049 |
TPA (°) | 40.5 ± 10.9 | 32.6 ± 9.5 | 0.051 |
SVA (mm) | 117.3 ± 17.0 | 89.1 ± 14.7 | 0.223 |
Cobb angle (°) | 40.9 ± 15.4 | 23.4 ± 15.9 | 0.007 |
CBD (mm) | 47.8 ± 35.7 | 22.8 ± 16.6 | 0.020 |
Postoperative | |||
TK (°) | 35.2 ± 7.1 | 37.1 ± 8.0 | 0.508 |
LL (°) | 42.3 ± 5.5 | 39.9 ± 8.0 | 0.382 |
PT (°) | 21.9 ± 6.1 | 25.3 ± 4.9 | 0.114 |
PI (°) | 49.1 ± 7.4 | 51.6 ± 7.3 | 0.373 |
PI–LL (°) | 6.8 ± 5.7 | 11.7 ± 6.3 | 0.043 |
TPA (°) | 18.0 ± 7.8 | 22.3 ± 4.7 | 0.083 |
SVA (mm) | 18.7 ± 37.2 | 41.3 ± 32.2 | 0.097 |
Cobb angle (°) | 15.0 ± 8.2 | 10.4 ± 7.9 | 0.144 |
CBD (mm) | 17.9 ± 13.4 | 18.0 ± 11.7 | 0.984 |
Postoperative–preoperative (Δ) | |||
Δ TK (°) | 19.8 ± 8.8 | 19.6 ± 9.0 | 0.937 |
Δ LL (°) | 41.3 ± 11.2 | 22.8 ± 11.3 | < 0.001 |
Δ PT (°) | –17.0 ± 10.3 | –7.1 ± 5.4 | 0.003 |
Δ PI (°) | –0.3 ± 2.8 | 0.6 ± 3.6 | 0.523 |
Δ PI–LL (°) | –38.1 ± 17.2 | –21.6 ± 13.0 | 0.008 |
Δ TPA (°) | –22.5 ± 13.0 | –10.3 ± 8.4 | 0.006 |
Δ SVA (mm) | –98.6 ± 60.8 | –47.9 ± 54.5 | 0.029 |
Δ Cobb angle (°) | –25.9 ± 8.9 | –13.1 ± 9.5 | 0.001 |
Δ CBD (mm) | –29.8 ± 39.9 | –6.7 ± 15.8 | 0.044 |