Table 5 Classification characteristics
From: Internal validation of modified Mirels’ scoring system for pathologic femur fractures
Internal validation dataset | Original MSTS dataset | |||
|---|---|---|---|---|
Patient image source | Radiograph | CT Scan | ||
Number of cases | 7 Fracture | 47 No Fracture | 8 Fracture | 40 No Fracture | ||
Fracture prevalence (%) | 12.9 | 16.7 | ||
OM Scoring | MM Scoring | OM Scoring | MM Scoring | |
ROC AUC | 0.754 (0.639, 0.869) | 0.878 (0.791, 0.965) | 0.853 (0.777, 0.929) | 0.941 (0.891, 0.991) |
True positive rate (%) | 85.7 (48.7,97.4) | 100 (64.5, 100) | 100 (67.5, 100) | 87.5 (67.6, 100) |
False positive rate (%) | 55.4 (41.3, 68.6) | 29.8 (18.7, 44.0) | 55.0 (39.1, 69.3) | 37.5 (22.2, 50.5) |
PPV (%) | 18.7 (8.9, 35.3) | 33.3 (17.2, 54.6) | 26.7 (14.2, 44.4) | 34.7 (19.7, 57.0) |
NPV (%) | 95.4 (78.2, 99.2) | 100 (89.5, 100) | 100 (82.4, 100) | 100 (87.1, 100) |
Misclassification (%) | 50.0 | 25.9 | 45.8 | 31.2 |