Table 3 Independent coronal plane radiographic deformity variables possibly related to postoperative TPPR Increase.
Variable | All Patients N = 17 | No TPPR Increase (A) N = 10 | TPPR Increase (B) N = 7 | P a |
|---|---|---|---|---|
Coronal Balance, mm; + left, - right | ||||
Preoperative | 17 ± 17.0 | 14 ± 15.8 | 22 ± 18.8 | ns |
Postoperative | 18 ± 17.9 | 11 ± 18.5 | 29 ± 10.3 | 0.018 |
Follow-up (FU) | 6 ± 10.8 | 5 ± 12.7 | 7 ± 8.2 | ns |
P b Pre to Post: A, ns; B, ns Post to FU: A, ns; B, 0.028 | ||||
Thoracic Cobb ° | ||||
Preoperative | 57 ± 9.2 | 58 ± 9.1 | 56 ± 9.9 | ns |
Bend | 39 ± 6.3 | 37 ± 7.0 | 41 ± 4.9 | ns |
Postoperative | 23 ± 7.9 | 23 ± 8.8 | 22 ± 6.9 | ns |
Follow-up | 23 ± 6.9 | 22 ± 7.8 | 25 ± 5.5 | ns |
P b Pre to Post: A, 0.005; B, 0.018 Post to FU: A, ns; B, ns | ||||
Thoracolumbar/Lumbar Cobb ° | ||||
Preoperative | 62 ± 6.3 | 60 ± 6.8 | 64 ±5.2 | ns |
Bend | 32 ± 6.2 | 33 ± 5.9 | 31 ± 6.9 | ns |
Postoperative | 17 ± 9.0 | 17 ± 10.8 | 17 ± 6.4 | ns |
Follow-up | 16 ± 7.6 | 16 ± 9.2 | 17 ± 5.4 | ns |
P b Pre to Post: A, 0.005; B, 0.018 Post to FU: A, ns; B, ns | ||||
Lower Instrumented Vertebra (LIV) Tilt °; + right, - left | ||||
Preoperative | -26 ± 7.8 | -23 ± 7.1 | -29 ± 7.9 | ns |
Postoperative | -3 ± 4.5 | -2 ± 3.1 | -4 ± 6.0 | ns |
Follow-up | -1 ± 2.9 | -1 ± 3.4 | -1 ± 2.2 | ns |
P b Pre to Post: A, 0.005; B, 0.018 Post to FU: A, ns; B, ns | ||||
LIV Plus One (vertebra below) Tilt °; + right, - left | ||||
Preoperative | -26 ± 4.8 | -23 ± 3.1 | -29 ± 4.6 | 0.014 |
Postoperative | -7 ± 3.8 | -7 ± 3.7 | -7 ± 4.2 | ns |
Follow-up | -7 ± 5.4 | -7 ± 6.5 | -7 ± 3.7 | ns |
P b Pre to Post: A, 0.005; B, 0.017 Post to FU: A, ns; B, ns | ||||
Lower Instrumented Vertebra (LIV) to Sacrum Cobb: ° | ||||
Preoperative | 21 ± 7.7 | 20 ± 6.8 | 22 ± 9.1 | ns |
Bend | 5 ± 5.9 * | 4 ± 4.6 ** | 5 ± 7.6 | ns |
Postoperative | 0 ± 4.9 | 0 ± 3.3 | 0 ± 7.0 | ns |
Follow-up | -3 ± 3.8 | -2 ± 3.6 | -4 ± 3.8 | ns |
P b Pre to Post: A, 0.005; B, 0.018 Post to FU: A, ns; B, ns | ||||
LIV plus 1 (vertebra below) to Sacrum Cobb: ° | ||||
Preoperative | 22 ± 4.7 | 20 ± 2.9 | 24 ± 5.9 | ns |
Bend | 8 ± 4.5 * | 6 ± 4.1 ** | 10 ± 4.5 | ns |
Postoperative | 4 ± 4.0 | 5 ± 2.6 | 3 ± 5.4 | ns |
Follow-up | 3 ± 5.2 | 5 ± 5.9 | 1 ± 3.4 | ns |
P b Pre to Post: A, 0.005; B, 0.0018 Post to FU: A, ns; B, ns | ||||