Table 2 Comparisons of operation related data between 2 cohorts
Category | Group U (N = 19) | Group B (N = 57) | P-value | |
|---|---|---|---|---|
Length of stay | 11.8 ± 2.3 | 12.0 ± 3.2 | 0.791 | |
Operation time | 138.7 ± 31.7 | 151.1 ± 36.9 | 0.191 | |
Estimated blood loss | 426.6 ± 305.8 | 528.0 ± 408.0 | 0.379 | |
Bone graft material | Local bone | 2 (10.5%) | 8 (14.0%) | 0.098 |
DBM | 3 (15.8%) | 23 (40.4%) | ||
BMP | 14 (73.7%) | 26 (45.6%) | ||
Fusion state at 1Y | Yes | 12 (63.2%) | 53 (93.0%) | 0.004 |
No | 7 (36.8%) | 4 (7.0%) | ||
Complications | Screw related | 0 (0.0%) | 4 (7.0%) | 0.567 |
Dural tear | 2 (10.5%) | 1 (1.8%) | 0.152 | |
Neurologic | 0 (0.0%) | 0 (0.0%) | NA | |
FBSS | 1 (5.3%) | 6 (10.5%) | 0.672 |