Comparison of Preoperative and Postoperative Anterior Disk Height (ADH) and (Posterior Disk Height (PDH) within groups.
| Pre-op ADH [mean (mm) ± SD] | Post-op ADH [mean (mm) ± SD] | p value | Pre-op PDH [mean (mm) ± SD] | Post-op PDH [mean (mm) ± SD] | p value | |
|---|---|---|---|---|---|---|
| LLIF | 7.9 ± 4.3 | 13.8 ± 3.8 | p<0.01 | 3.7 ± 2.5 | 6.5 ± 3.1 | p<0.01 |
| ALIF | 9.7 ± 5.6 | 18.4 ± 5.1 | p<0.01 | 3.8 ± 2.0 | 7.1 ± 2.6 | p<0.01 |
| TLIF | 9.8 ± 5.1 | 12.6 ± 3.8 | p<0.01 | 4.5 ± 3.0 | 5.9 ± 2.9 | p<0.01 |
| PSF | 9.9 ± 4.2 | 10.2 ± 3.8 | p=0.25 | 4.3 ± 2.1 | 3.9 ± 2.0 | p=0.04 |