TABLE III.
Regression statistics and agreement between predicted and exact WI peak times.
| F-ML Algorithm | Lasso | KRR | SVR | Random Forrest | Gradient Boosting | Neural Network |
|---|---|---|---|---|---|---|
| Wf1 Peak Time | ||||||
| Correlation Coefficient (r) | 0.55 | 0.75 | 0.75 | 0.51 | 0.68 | 0.80 |
| RMSE | 7.3 | 5.9 | 6.1 | 7.7 | 6.5 | 5.4 |
| Normalized RMSE (%) | 13.0 | 10.6 | 10.8 | 13.7 | 11.6 | 9.8 |
| Limit of Agreement | 28.5 | 23.2 | 23.8 | 30.1 | 25.1 | 20.5 |
| Mean Difference | −0.3 | 0.1 | 0.2 | 0.0 | 0.0 | 0.7 |
| Wf2 Peak Time | ||||||
| Correlation Coefficient (r) | 0.92 | 0.97 | 0.97 | 0.84 | 0.92 | 0.97 |
| RMSE | 11.3 | 7.1 | 8.1 | 16.7 | 11.7 | 6.8 |
| Normalized RMSE (%) | 5.6 | 3.5 | 4.0 | 8.2 | 5.7 | 3.3 |
| Limit of Agreement | 44.1 | 27.9 | 31.9 | 65.5 | 43.9 | 27.0 |
| Mean Difference | 1.1 | 0.4 | 0.6 | −1.1 | −0.8 | −2.3 |
| Wb1 Peak Time | ||||||
| Correlation Coefficient (r) | 0.49 | 0.59 | 0.60 | 0.45 | 0.55 | 0.60 |
| RMSE | 24.0 | 22.0 | 21.9 | 24.8 | 23.0 | 22.2 |
| Normalized RMSE (%) | 14.2 | 13.0 | 13.0 | 14.7 | 13.6 | 13.1 |
| Limit of Agreement | 94 | 86.2 | 85.9 | 97.4 | 93.1 | 88.5 |
| Mean Difference | −0.4 | 0.3 | 0.5 | −0.3 | −0.2 | −0.5 |
*
Correlations have -values< 0.05 unless otherwise indicated. All wave intensity timings are reported in units of ms. SVR indicates the support vector regressor. KRR indicates the kernel ridge regressor. Underline values show the highest correlations.