The linear regression model on leg pain relief.
| Co-variate | Effect | p-value | Estimate | 95% confidence intervals | |
|---|---|---|---|---|---|
| Age | per year | 0.57 | -0.01 | -0.05 | 0.03 |
| Sex | female vs. male | 0.66 | 0.17 | -0.61 | 0.95 |
| Disc herniation | no vs. yes | 0.68 | -0.17 | -1.00 | 0.66 |
| Number of segments | mono- vs. bisegmental | 0.029 | 0.93 | 0.10 | 1.77 |
| Treated segment | L3-4 vs. L5-S1 | <0.001 | -3.69 | -5.66 | -1.71 |
| L4-5 vs. L5-S1 | 0.31 | 0.44 | -0.42 | 1.30 | |
| Back pain atbaseline | per point | 0.83 | 0.02 | -0.15 | 0.19 |
| Leg pain atbaseline | per point | <0.001 | 0.83 | 0.70 | 0.96 |
| Treatment | VTDR vs. ALIF | <0.001 | 2.12 | 1.12 | 3.13 |
| Follow-upinterval | per month | 0.99 | 0.00 | -0.04 | 0.04 |
Co-variates associated with the back pain relief are bold.