Table 4. Network performance for patella.
| Patella | |||||
|---|---|---|---|---|---|
| Observed cases (n = 600) | Sensitivity (%) | Specificity (%) | Youden’s J | AUC (95% CI) | |
| A | |||||
| A | 5 | 80 | 83 | 0.63 | 0.79 (0.67 to 0.86) |
| 1 | 5 | 80 | 85 | 0.65 | 0.81 (0.68 to 0.89) |
| 1a | 2 | 100 | 94 | 0.94 | 0.97 (0.93 to 0.99) |
| B | |||||
| B | 6 | 100 | 90 | 0.90 | 0.94 (0.91 to 0.97) |
| 1 | 6 | 100 | 90 | 0.90 | 0.93 (0.90 to 0.97) |
| …1 | 3 | 100 | 78 | 0.78 | 0.86 (0.76 to 0.95) |
| …2 | 3 | 100 | 89 | 0.89 | 0.95 (0.89 to 0.99) |
| C | |||||
| C | 29 | 90 | 86 | 0.75 | 0.90 (0.79 to 0.97) |
| 1 | 11 | 91 | 86 | 0.76 | 0.89 (0.74 to 0.97) |
| …1 | 6 | 100 | 85 | 0.85 | 0.94 (0.89 to 0.99) |
| …3 | 5 | 60 | 89 | 0.49 | 0.75 (0.44 to 0.96) |
| 2 | 8 | 100 | 88 | 0.88 | 0.97 (0.93 to 0.99) |
| 3 | 10 | 80 | 97 | 0.77 | 0.88 (0.70 to 0.98) |
| Custom classes | |||||
| Displaced | 21 | 81 | 91 | 0.72 | 0.88 (0.76 to 0.97 |
Table showing network performance for the different AO-OTA classes as well as other fracture descriptors, letter corresponds to fracture type, first number to group, second number to subgroup and last letter to qualifiers. The observed cases column correspond to the number of observed fractures by the reviewers. Note that an exam can appear several times as the category B1.1 will belong to both the overall B-type, B1 group and B1.1 subgroup at the same time.