Table 2.
Model evaluation and construction. The median and interquartile range is shown over cross-validation splits for SVM models constructed with different imaging modalities. The number of principle components and explained variance thereof refer to automatically tuned hyper-parameters. Permutation test significant *p < .003.
| Imaging Modality |
Model Evaluation |
Model Construction |
|||
|---|---|---|---|---|---|
| Accuracy (%) | Sensitivity (%) | Specificity (%) | Number of Principle Components | Variance of Data Explained by PCs (%) | |
| FA | 76.7 [72.4–80.0]* | 66.7 [57.1–80.0] | 80.0 [76.2–83.3] | 17 [9–24] | 53.2 [38.2–64.1] |
| MD | 80.0 [75.9–86.2]* | 77.8 [66.7–88.9] | 82.6 [79.2–86.4] | 17 [9–25] | 82.3 [70.3–87.8] |
| AD | 82.8 [79.3–86.2]* | 80.0 [66.7–88.9] | 84.0 [80.0–88.2] | 15 [8–24] | 77.5 [66.0–85.0] |
| RD | 79.3 [72.4–82.8]* | 71.4 [60.0–83.3] | 81.0 [77.3–85.7] | 18 [9–26] | 89.0 [81.2–93.4] |
| Lesion Segmentation | 76.7 [73.3–82.8]* | 66.7 [57.1–80.0] | 81.8 [77.3–85.0] | 15 [7–23] | 80.7 [65.5–89.2] |