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Characteristic | ASD (n = 30) | Non-ASD (n = 31) | p-value |
---|---|---|---|
Sex | 0.934 | ||
Male | 9 (30) | 9 (29) | |
Female | 21 (70) | 22 (71) | |
Age (yr) | |||
Mean± SD | 59.6 ± 8.5 | 63.2 ± 8.1 | 0.091 |
Range (IQR) | 54.3–66.0 | 55.0–70.0 | |
BMI | |||
Mean± SD | 24.0 ± 3.8 | 23.9 ± 2.3 | 0.868 |
Range (IQR) | 22.6–25.6 | 21.9–25.0 | |
Follow-up | |||
Mean± SD | 68.5 ± 11.1 | 71.8 ± 12.0 | 0.264 |
Range (IQR) | 59.0–75.3 | 62.0–81.0 | |
Smoking | 3 (10.0) | 4 (12.9) | > 0.999 |
Post decompression | 20 (66.7) | 24 (77.4) | 0.402 |
Disease (index level) | 0.161 | ||
DS | 20 (66.7) | 23 (74.2) | |
FS | 7 (23.3) | 4 (12.9) | |
CS | 2 (6.7) | 4 (12.9) | |
DH | 1 (3.8) | 0 (0) | |
Disease (adjacent level) | |||
L3–4 segment | n= 13 | n= 48 | |
Disc degeneration* | 0.238 | ||
Grade 2 | 1 (7.7) | 2 (4.2) | |
Grade 3 | 2 (15.4) | 20 (41.7) | |
Grade 4 | 10 (76.9) | 25 (52.1) | |
Grade 5 | 0 (0) | 1 (2.1) | |
Facet degeneration† | 0.290 | ||
Grade 0 | 3 (23.1) | 22 (45.8) | |
Grade 1 | 7 (53.8) | 21 (43.8) | |
Grade 2 | 2 (15.4) | 3 (6.3) | |
Grade 3 | 1 (7.7) | 2 (4.2) | |
Vacuum disc | 4 (30.8) | 12 (25.0) | 0.728 |
Wedge deformity‡ | 1 (7.7) | 6 (12.5) | 0.999 |
Spondylolisthesis§ | 0.756 | ||
Anterior | 0 (0) | 1 (2.1) | |
Retro | 3 (23.1) | 8 (16.7) | |
L5-S1 segment | n= 21 | n= 40 | |
Disc degeneration* | 0.709 | ||
Grade 2 | 2 (9.5) | 9 (7.5) | |
Grade 3 | 4 (19.0) | 12 (30.0) | |
Grade 4 | 14 (66.7) | 21 (52.5) | |
Grade 5 | 1 (4.8) | 4 (10.0) | |
Facet degeneration† | 0.547 | ||
Grade 0 | 11 (52.4) | 21 (52.5) | |
Grade 1 | 9 (42.9) | 17 (42.5) | |
Grade 2 | 0 (0) | 2 (5.0) | |
Grade 3 | 1 (4.8) | 0 (0) | |
Vacuum disc | 12 (57.1) | 14 (35.5) | 0.097 |
Wedge deformity‡ | 0 (0) | 0 (0) | > 0.999 |
Spondylolisthesis§ | 0.533 | ||
Anterior | 1 (4.8) | 0 (0) | |
Retro | 1 (4.8) | 3 (7.5) |
Values are presented as number (%) unless otherwise indicated.
ASD, adjacent segment disease; SD, standard deviation; IQR, interquartile range; BMI, body mass index; DS, degenerative spondylolisthesis; FS, foraminal stenosis; CS, central spinal stenosis; DH, lumbar disc herniation.
Chi-square test and Student t-test were used for statistical analysis.
Variable |
ASD (n = 30) |
Non-ASD (n = 31) |
||||
---|---|---|---|---|---|---|
Preoperative | Postoperative | p-value | Preoperative | Postoperative | p-value | |
PeIvic incidence (PI) | 55.34 ± 11.85 | 55.33 ± 11.85 | 0.999 | 52.56 ± 11.25 | 52.64 ± 11.26 | 0.310 |
Pelvic tilt | 22.16 ± 10.14 | 21.10 ± 10.80 | 0.294 | 19.04 ± 8.76 | 14.94 ± 8.76 | 0.006* |
Sacral slope | 33.16 ± 9.38 | 34.23 ± 7.82 | 0.294 | 33.51 ± 8.99 | 37.61 ± 7.68 | 0.006* |
Lumbar lordosis (LL) | 40.63 ± 15.30 | 44.96 ± 12.08 | 0.039* | 39.67 ± 14.45 | 48.61 ± 10.20 | < 0.001* |
Segmental angle | 4.06 ± 3.96 | 10.78 ± 3.21 | < 0.001* | 1.52 ± 5.89 | 10.62 ± 3.27 | < 0.001* |
PI–LL | 14.07 ± 16.14 | 10.36 ± 16.12 | 0.039* | 12.89 ± 13.67 | 3.94 ± 10.37 | 0.004* |
L1 SVA (mm) | 24.86 ± 21.84 | 18.30 ± 22.49 | 0.124 | 27.90 ± 24.57 | 18.88 ± 17.76 | < 0.001* |
Disc height (mm) | 8.58 ± 2.55 | 13.98 ± 1.85 | < 0.001* | 7.74 ± 2.57 | 13.48 ± 1.60 | < 0.001* |
Variable |
Preoperative |
Postoperative |
||||
---|---|---|---|---|---|---|
ASD (n=30) | Non-ASD (n=31) | p-value | ASD (n = 30) | Non-ASD (n = 31) | p-value | |
PeIvic incidence (PI) | 55.34 ± 11.85 | 52.56 ± 11.25 | 0.353 | 55.33 ± 11.85 | 52.64 ± 11.26 | 0.511 |
Pelvic tilt (PT) | 22.16 ± 10.14 | 19.04 ± 8.76 | 0.203 | 21.10 ± 10.80 | 14.94 ± 8.76 | 0.017* |
PT > 15 | 22 (73.3) | 22 (71.0) | > 0.999 | 22 (73.3) | 14 (45.2) | 0.037* |
Sacral slope | 33.16 ± 9.38 | 33.51 ± 8.99 | 0.882 | 34.23 ± 7.82 | 37.61 ± 7.68 | 0.094 |
Lumbar lordosis (LL) | 40.63 ± 15.30 | 39.67 ± 14.45 | 0.801 | 44.96 ± 12.08 | 48.61 ± 10.20 | 0.207 |
Segmental angle | 4.06 ± 3.96 | 1.52 ± 5.89 | 0.060 | 10.78 ± 3.21 | 10.62 ± 3.27 | 0.849 |
PI–LL | 14.07 ± 16.14 | 12.89 ± 13.67 | 0.638 | 10.36 ± 16.12 | 3.94 ± 10.37 | 0.069 |
PI–LL > 10 | 22 (73.3) | 23 (74.2) | > 0.999 | 21 (70.0) | 9 (29.0) | 0.002* |
L1 SVA (mm) | 24.86 ± 21.84 | 27.90 ± 24.57 | 0.612 | 18.30 ± 22.49 | 18.88 ± 17.76 | 0.912 |
Disc height (mm) | 8.58 ± 2.55 | 7.74 ± 2.57 | 0.205 | 13.98 ± 1.85 | 13.48 ± 1.60 | 0.258 |