Table 2.
The radiographic results showing significant improvement in the lumbar canal cross sectional area at the operative level with preservation of ipsilateral and contralateral facets.
| Variable | Preoperative | Postoperative | Final follow-up | P value |
| Disc height (mm) | 10.6 (±2.89) | 10.8 (±2.96) | 10.56 (±3) | P > .05 |
| Segmental lordotic angle | 12.6 (±6.6) | 15.26 (±7.78) | 13.47 (±7.4) | P < .05 |
| Lumbar lordosis | 36.7 (±8.9) | 41.6 (±10.16) | 39.8 (±10.27) | P < .05 |
| Facet length | ||||
| • Ipsilateral | 14.8 (±0.9) | 14.4 (±0.7) | P > .05 | |
| • Contralateral | 14.9 (±0.6) | 14.8 (±0.6) | P > .05 | |
| Facet cross-sectional area | ||||
| • Ipsilateral | 240 (±12.83) | 233 (±14.5) | P > .05 | |
| • Contralateral | 241 (±15.4) | 240 (±16.2) | P > .05 | |
| Canal cross sectional area | ||||
| • Index level | 85.7 (±28.4) | 151.3 (±38.6) | 150.5 (±38.6) | P < .05 |
| • Level above | 130.8 (±21.9) | 130.7 (±23.7) | 130.4 (±26.6) | P > .05 |
| • Level below | 139.1 (±28.1) | 139.8 (±28) | 141.7 (±25.3) | P > .05 |