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Comparison of the ratio of MF atrophy
| SPS open PSF group | Conventional open PSF group | P value | |
|---|---|---|---|
| (N = 27) | (N = 26) | ||
| Fused level | |||
| 1 year | 0.98 ± 0.08 | 0.87 ± 0.07 | <0.01 |
| 3 year | 0.96 ± 0.11 | 0.84 ± 0.07 | <0.01 |
| Cranial adjacent level | |||
| 1 year | 1.01 ± 0.06 | 0.99 ± 0.08 | NS |
| 3 year | 0.98 ± 0.09 | 0.94 ± 0.12 | NS |
| Caudal adjacent level | |||
| 1 year | 0.93 ± 0.08 | 0.84 ± 0.09 | <0.01 |
| 3 year | 0.92 ± 0.08 | 0.80 ± 0.09 | <0.01 |
Values are mean ± standard deviation, NS not significant (p > 0.05)
