Improvement in VAS back and leg scores at 9 months follow-up by subject subgroup.
| N | Improvement (VAS Back) | P (back) | Improvement (VAS Leg) | P (leg) | |
|---|---|---|---|---|---|
| Overall | 43 | 4.5 | 0.0001 | 4.1 | 0.0001 |
| Age: <55 years | 27 | 4.5 | 0.98 | 3.9 | 0.47 |
| Age: >55 years | 16 | 4.5 | 4.6 | ||
| Female | 23 | 4.4 | 0.73 | 4.4 | 0.54 |
| Male | 20 | 4.7 | 3.8 | ||
| No Tobacco Use | 35 | 4.6 | 0.62 | 4.3 | 0.55 |
| Tobacco Use | 8 | 4.1 | 3.5 | ||
| Metabolic Comorbidity | 25 | 4.4 | 0.82 | 4.3 | 0.68 |
| No Metabolic Comorbidity | 18 | 4.6 | 3.9 | ||
| No Prior Surgery | 33 | 4.7 | 0.44 | 4.1 | 0.78 |
| Prior Surgery | 10 | 4 | 4.4 | ||
| Single-Level Surgery | 23 | 4.5 | 0.93 | 3.7 | 0.35 |
| Multilevel Surgery | 20 | 4.6 | 4.7 | ||
| No Worker's Comp | 18 | 5.3 | 0.05 | 4.9 | 0.21 |
| Worker's Comp | 25 | 3.9 | 3.6 | ||
| Standalone ALIF | 11 | 5.2 | 0.28 | 4.8 | 0.44 |
| ALIF + PSF | 32 | 4.3 | 3.9 | ||
| BMI <30 | 25 | 4.1 | 0.21 | 4.6 | 0.33 |
| BMI >30 | 18 | 5.1 | 3.6 | ||
| Spondylolisthesis | 24 | 4.4 | 0.68 | 3.7 | 0.34 |
| No Spondylolisthesis | 18 | 4.7 | 4.7 |