Subsidence group (n = 16) | Nonsubsidence group (n = 60) | P value | |
---|---|---|---|
Mean age (years) | 64.4 ± 7.1 | 54.0 ± 10.1 | < 0.001 |
Sex (M/F) (% male) | 6/10 (37.5) | 24/36 (40.0) | 0.856 |
BMI (kg/m2) | 24.6 ± 1.8 | 24.7 ± 2.3 | 0.892 |
Lowest T-score | − 2.8 ± 0.8 | − 1.6 ± 1.3 | < 0.001 |
HU value | |||
L1 vertebrae | 98.5 ± 18.8 | 140.8 ± 28.6 | < 0.001 |
L1-L4 horizontal plane | 95.4 ± 17.6 | 136.8 ± 28.3 | < 0.001 |
L1-L4 sagittal plane | 90.7 ± 22.4 | 135.2 ± 31.3 | < 0.001 |
Operated segment | 96.3 ± 19.2 | 134.4 ± 29.7 | < 0.001 |
Upper vertebrae of operated segment | 94.7 ± 20.4 | 133.2 ± 28.8 | < 0.001 |
Lower vertebrae of operated segment | 97.8 ± 20.5 | 135.6 ± 32.4 | < 0.001 |
Diagnoses [no.(%) of patients] | |||
Degenerative spondylolisthesis | 8 (50) | 24 (40) | 0.472 |
Lumbar instability | 5 (31.3) | 12 (20) | 0.534 |
Adjacent segmental disease | 3 (18.8) | 15 (25) | 0.848 |
Adult degenerative scoliosis | 0 (0) | 6 (10.0) | 0.426 |
Discogenic back pain | 0 (0) | 3 (5.0) | 1.000 |
Fused level [no.(%)of patients] | |||
One level | 16 (100) | 54 (90) | 0.426 |
Two level | 0 (0) | 4 (6.7) | 0.573 |
Three level | 0 (0) | 2 (3.3) | 1.000 |