Table 2. Summary of clinical results for ALIF and LLIF.
| ALIF | LLIF | ||||
|---|---|---|---|---|---|
| Preop (mean ± SD) | 24 mo (mean ± SD) | Preop (mean ± SD) | 24 mo (mean ± SD) | Significance (p value)a | |
| VAS (back) | 6.5 ± 2.3 | 2.3 ± 2.1 | 6.5 ± 2.5 | 2.7 ± 2.5 | 0.4191 |
| VAS (leg) | 5.5 ± 2.5 | 1.9 ± 2.5 | 6.0 ± 2.6 | 2.0 ± 2.5 | 0.4298 |
| ODI | 49.9 ± 16.0 | 20.2 ± 18.7 | 53.0 ± 13.2 | 25.6 ± 17.6 | 0.1877 |
| SF-36 PCS | 32.0 ± 8.0 | 46.1 ± 9.8 | 29.4 ± 8.2 | 43.3 ± 9.6 | >0.9999 |
| SF-36 MCS | 40.4 ± 12.4 | 50.9 ± 11.4 | 45.9 ± 9.7 | 51.4 ± 11.2 | N/Ab |
Abbreviations: ALIF, anterior lumbar interbody fusion; LLIF, lateral lumbar interbody fusion; MCS, mental component score; N/A, not applicable; ODI, Oswestry Disability Index; PCS, physical component score; preop, preoperative; SD, standard deviation; SF-36, Short Form 36; VAS, visual analogue scale.
a
Comparison based on the number of patients who met the defined thresholds for minimum clinically important difference.17
b
MCS does not have a minimum clinically important difference.