Table 1 Baseline characteristics
Characteristic | group A (n = 53) | group B (n = 72) | P value |
|---|---|---|---|
Age at surgery, mean (SD), years | 74.2 (4.2) | 61.7 (5.5) | < 0.001 |
Diagnosis, n (%) | 0.66 | ||
Degenerative spondylolisthesis | 26 (49.0) | 38 (52.8) | |
Spinal stenosis | 26 (49.0) | 31 (43.0) | |
Spondylotic spondylolisthesis | 1 (1.9) | 3 (4.2) | |
BMD YAM, mean (SD), % | 81.7 (16.3) | 85.1 (16.9) | 0.32 |
Surgical Procedure, n (%) | 0.88 | ||
PLIF | 18 (33.9) | 24 (33.3) | |
PLF | 12 (22.6) | 19 (26.4) | |
PLF combined with PLIF | 23 (43.4) | 29 (40.3) | |
Number of levels fused, mean (SD), n | 2.2 (0.9) | 2.1 (0.9) | 0.37 |
Types of fusion length, n (%) | 0.37 | ||
short-segment fusion (1 or 2 levels) | 32 (60.3) | 49 (68.0) | |
long-segment fusion (3 or 4 levels) | 21 (39.6) | 23 (31.9) | |
Fusion to lumbosacral junction, n (%) | 14 (26.4) | 10 (19.4) | 0.35 |
Use of a transverse fixator | 22 (41.5) | 23 (31.9) | 0.27 |