Results of the multiple variable regression
| Dependent Variable | r2 Model | Independent Variable | Regression Coefficient | P Value |
|---|---|---|---|---|
| Spinal cord area | 0.27 | CAG | –1.09 | .002 |
| Disease duration | –3.72 | .020 | ||
| CAG*DD | 2.24 | .029 | ||
| Spinal cord eccentricity | 0.07 | CAG | 1.64 | .107 |
| Disease duration | 1.24 | .218 | ||
| CAG*DD | –1.36 | .178 |
Note:—CAG*DD indicates CAG multiplied by disease duration.