NFSD group(n = 16) | Disease-free group(n = 155) | P value | |
---|---|---|---|
Age at operation (years) | 51.06 ± 7.15 | 50.56 ± 9.92 | 0.844 |
Preoperative alignment (degrees) | 7.75 ± 3.44 | 9.32 ± 3.79 | 0.113 |
Postoperative alignment(degrees)* | 8.38 ± 4.57 | 17.30 ± 4.43 | 0.000 |
Pavlov’s ratio (C5) | 0.84 ± 0.08 | 0.83 ± 0.09 | 0.597 |
Number of levels fused* | 1.69 ± 0.79 | 2.26 ± 0.77 | 0.005 |
Scores of disc degeneration in non-fusion segments* | 2.25 ± 1.13 | 1.52 ± 0.94 | 0.004 |