Fig. 1 Kaplan–Meier curve at 2 and 5 years.
Table 1
Incidence and revision rates of APJFs in the three groups
|
All (135)
|
T9–T10 (52)
|
T11–T12 (45)
|
L1–L2 (33)
|
|
APJFs
|
52 (39%)
|
25 (48%)
|
14 (31%)
|
13 (39%)
|
|
UIV, UIV + 1 fracture
|
32 (62%)
|
19 (76%)
|
8 (57%)
|
5 (38%)
|
|
PJK > 15 degrees
|
11 (21%)
|
3 (12%)
|
3 (21%)
|
5 (39%)
|
|
UIV implant failure
|
8 (15%)
|
2 (8%)
|
3 (21%)
|
3 (23%)
|
|
< 6 mo revision
|
1 (2%)
|
1 (4%)
|
0 (0%)
|
0 (0%)
|
|
Revision APJF
|
23 (44%)
|
10 (40%)
|
6 (43%)
|
7 (54%)
|
|
UIV, UIV + 1 fracture
|
16 (70%)
|
8 (80%)
|
3 (50%)
|
5 (71%)
|
|
PJK > 15 degrees
|
0 (0%)
|
0 (0%)
|
0 (0%)
|
0 (0%)
|
|
UIV implant failure
|
6 (26%)
|
1 (10%)
|
3 (50%)
|
2 (29%)
|
|
< 6 mo revision
|
1 (4%)
|
1 (10%)
|
0 (0%)
|
0 (0%)
|
|
Overall revision APJF
|
23/135 (17%)
|
10/52 (19%)
|
6/45 (13%)
|
7/33 (21%)
|
Table 2
Univariate logistic on APJF with age adjustment
|
Variable names
|
OR (95% CI)
|
p value
|
|
Pre-SVA > 5
|
2.46 (1.19, 5.1)
|
0.015
|
|
Post-PJA > 5
|
36.63 (4.79,280)
|
0.001
|
|
Imm-post ThK > 30
|
2.5 (1.11, 5.63)
|
0.027
|
|
Instrumentation to pelvis
|
2.19 (1.07, 4.48)
|
0.032
|
|
LL change > 30
|
4.81 (1.9, 12.17)
|
0.001
|
Abbreviations: CI, confidence interval; Imm-post, immediately postoperative standing X-ray; LL, lumbar lordosis; OR, odds ratio; PJA, proximal junctional angle; SVA, sagittal vertical axis; ThK, thoracic kyphosis.
Table 3
Multivariate logistic regression on APJF
|
Variable names
|
OR (95% CI)
|
p value
|
|
LL change > 30 degrees
|
6.94 (1.67, 28.75)
|
0.008
|
|
Post-PJA > 5 degrees
|
27.77 (3.18, 242.47)
|
0.002
|
Abbreviations: CI, confidence interval; Post, immediately postoperative standing X-ray; LL, lumbar lordosis; OR, odds ratio; PJA, proximal junctional angle.
