Preoperative and postoperative ODI and VAS scores for patients undergoing stand-alone ALIF vs ALIF With posterior instrumentation.
| Stand-Alone ALIF | ALIF + PI | |||
| Outcome Measure | Preop | Postop | Preop | Postop |
| ODI | 44.0 | 27.3 | 43.8 | 27.5 |
| VAS back pain | 6.3 | 2.8 | 6.2 | 3.0 |
| VAS leg pain | 5.0 | 1.9 | 5.0 | 2.1 |
Note: The mean scores in both groups improved significantly on all 3 measures (all P < 0.01) with no significant differences between the 2 groups on any of the measures preoperative or postoperative (all P > 0.50).
ALIF, anterior lumbar interbody fusion; ODI, Oswestry Disability Index; PI, posterior instrumentation; VAS, visual analog scale.