Table 3. Details of ≥ moderate grade OVFs missed in the independent testing data.
| Case number | OVF number | Grade | Explanation for the false negativity |
|---|---|---|---|
| 4 | 4 | Moderate | OVF close to a border of the image |
| 1 | 1 | Moderate | OVF overlay with diagram line |
| 1 | 2 | Moderate | OVF together with osteoarthritis |
| 1 | 3 | Moderate | OVF together with osteoarthritis and disappearance of disc space |
| 1 | 1 | Moderate | Oblique filming to the X-ray beam |
| 3 | 3 | Moderate | n/a |
| 2 | 2 | Severe | n/a |
| 1 | 1 | Collapsed | Vertebra totally collapsed |
| 1 | 1 | Collapsed | Vertebra collapsed + rotation |
OVFs, osteoporotic vertebral fractures; n/a, not available.