Table 4 Comparative analysis by the fused status at postoperative 1-year
Category | Fusion (N = 65) | Pseudarthrosis (N = 11) | P-value (Uni) | P-value (Multi) | Beta | SE | |
|---|---|---|---|---|---|---|---|
Age | 63.8 ± 9.3 | 70.1 ± 9.7 | 0.041 | 0.028 | 0.138 | 0.063 | |
Sex | M | 24 (36.9%) | 6 (54.5%) | 0.269 | NA | NA | NA |
F | 41 (63.1%) | 5 (45.5%) | |||||
Cages | Unilateral | 12 (18.5%) | 7 (63.6%) | 0.004 | 0.007 | 2.429 | 0.901 |
Bilateral | 53 (81.5%) | 4 (36.4%) | |||||
BMI | 25.0 ± 2.4 | 27.0 ± 3.2 | 0.019 | 0.069 | 0.333 | 0.183 | |
BMD | −1.0 ± 1.2 | 0.2 ± 1.7 | 0.006 | 0.033 | 0.708 | 0.332 | |
Bone graft material | Local bone | 8 (12.3%) | 1 (9.1%) | 0.759 | NA | NA | NA |
DBM | 23 (35.4%) | 3 (27.3%) | |||||
BMP | 33 (50.8%) | 7 (63.6%) | |||||
Previous laminectomy | Y N | 4 (7.4%) 61 (92.6%) | 2 (18.2%) 9 (91.8%) | 0.207 | NA | NA | NA |
Asymmetric disc wedginga | Y N | 9 (13.8%) 56 (86.2%) | 2 (18.2%) 9 (91.8%) | 0.656 | NA | NA | NA |
Number of Op. level | 1.58 ± 0.50 | 1.55 ± 0.52 | 0.811 | NA | NA | NA | |
Level | L3–4 | 2 (3.1%) | 1 (9.1%) | 0.890 | NA | NA | NA |
L3–4-5 | 23 (35.4%) | 3 (27.3%) | |||||
L4–5 | 12 (18.5%) | 2 (18.2%) | |||||
L4–5-S1 | 15 (23.1%) | 3 (27.3%) | |||||
L5-S1 | 13 (20.0%) | 2 (18.2%) | |||||
Smoking | Y | 9 (13.8%) | 2 (18.2%) | 0.656 | NA | NA | NA |
N | 56 (86.2%) | 9 (81.8%) |