Otic capsule contour and thickness for diagnosis of otosclerosis
| Diagnostic Performance | Bulging/Convex Contoura | Otic Capsule Thickness >2.3 mmb |
|---|---|---|
| Sensitivity (%) | 68.3 | 96.2 |
| Specificity (%) | 98.1 | 100 |
| Positive predictive value (%) | 97.3 | 100 |
| Negative predictive value (%) | 76.3 | 96.4 |
↵a Bulging/convex contour across an imaginary line between the anterior margin of the oval window and the cochleariform process.
↵b Otic capsule thickness measured from the posterolateral margin of the cochlea closest to the middle ear (junction of the basal and middle turns) to the most convex contour.