Table 2.
Random forest variable importance of preliminary model
| Variable | Importance |
|---|---|
| Time from Baseline | 26.57% |
| Baseline ALSFRS‐R | 23.19% |
| Baseline ALSFRS slope | 13.74% |
| Baseline Trunk Sub‐score | 6.17% |
| Time Since Symptom Onset | 3.66% |
| Baseline FVC | 2.89% |
| Baseline Fine Motor Sub‐score | 2.80% |
| Time Since Diagnosis | 2.64% |
| Age | 2.40% |
| Baseline Bulbar Sub‐score | 2.33% |
| Systolic BP | 2.10% |
| Baseline Gross Motor Sub‐score | 2.07% |
| Weight | 2.05% |
| Pulse | 1.90% |
| Height | 1.85% |
| Diastolic BP | 1.56% |
| Baseline Respiratory Sub‐score | 0.98% |
| Limb Onset | 0.29% |
| Bulbar Onset | 0.29% |
| Gender | 0.27% |
| Riluzole Use | 0.26% |
FVC, forced vital capacity.
This table shows the variable importance list for a preliminary 21 variable model. To reduce the possibility of overfitting, variables whose importance was less than 2.00% were deleted from the final 13 variable model that was used in all the analyses.