Table 2.
Summary of Classification Performance Measures.
| Contingency Table (Excluding Confluent Lesions) | ||||
|---|---|---|---|---|
| Prediction | Reference | |||
| Rim Negative | Rim Positive | |||
| Rim Negative | 135 (47) | 8 (0) | ||
| Rim Positive | 31 (19) | 24 (6) | ||
| Testing Set Lesion Classification Count by Subject (Excluding Confluent Lesions) | ||||
| Subject | True Negative | False Negative | False Positive | True Positive |
| 1 | 65 (24) | 4 (0) | 10 (4) | 4 (1) |
| 5 | 13 (4) | 1 (0) | 8 (2) | 7 (0) |
| 8 | 25 (7) | 0 (0) | 4 (3) | 5 (0) |
| 16 | 32 (12) | 3 (0) | 9 (10) | 8 (5) |
| Performance Measures | With Confluent Lesions (95% CI) | Without Confluent Lesions | ||
| AUC | 0.82 (0.74, 0.92) | 0.88 | ||
| Accuracy | 0.8 (0.59, 0.91) | 0.74 | ||
| Positive Predictive Value | 0.44 (0.17, 0.55) | 0.24 | ||
| Negative Predictive Value | 0.94 (0.93, 1) | 1 | ||
| False Positive Rate | 0.19 (0.07, 0.46) | 0.29 | ||
| False Negative Rate | 0.25 (0, 0.37) | 0 | ||
| Sensitivity | 0.75 (0.63, 1) | 1 | ||
| Specificity | 0.81 (0.54, 0.93) | 0.71 | ||
The table summarizes the performance measures we observed for the classification of PRLs, where counts in parentheses are counts excluding confluent lesions. 95% confidence intervals are provided for performance measures where available.