Table 2.
Sensitivity to detect corneal pathology from images, stratified by diagnosis, grader, and camera
| Grader/Camera | Corneal Abrasion (n=13) Sensitivity (CIa) |
Corneal Scar (n=59) Sensitivity (CIb) |
Corneal Ulcer (n=34) Sensitivity (CIa) |
Pterygium (n=10) Sensitivity (CIa) |
|---|---|---|---|---|
|
| ||||
| Grader 1 | ||||
| iTouch | 76.9 (49.7, 91.8) | 54.2 (41.7, 67.4) | 91.2 (77.0, 97.0) | 90.0 (59.6, 98.2) |
| Nidek | 92.3 (66.7, 98.6) | 50.9 (38.7, 65.0) | 88.2 (73.4, 95.3) | 90.0 (59.6, 98.2) |
| Grader 2 | ||||
| iTouch | 69.2 (42.4, 87.3) | 28.8 (19.0, 39.7) | 82.4 (66.5, 91.7) | 90.0 (59.6, 98.2) |
| Nidek | 69.2 (42.4, 87.3) | 42.4 (30.6, 55.1) | 94.1 (80.9, 98.4) | 100.0 (72.3, 100.0) |
| Grader 3 | ||||
| iTouch | 76.9 (49.7, 91.8) | 44.1 (31.6, 57.1) | 91.2 (77.0, 97.0) | 100.0 (72.3, 100.0) |
| Nidek | 84.6 (57.8, 95.7) | 57.6 (45.0, 71.0) | 94.1 (80.9, 98.4) | 100.0 (72.3, 100.0) |
CI: 95% confidence interval, includes
a
Wilson CIs when diagnosis category contains no subjects contributing both eyes or only 1 subject contributing both eyes, and
b
CIs calculated from a logistic regression with generalized estimating equations adjustment to account for the correlation between eyes of a subject