| Variable | Value (95% CI)* |
|---|---|
| Fixed data elements | |
| Diabetic population in study setting13 | 10 354 patients |
| Eye examination rate with current practice (in-person examination)28 | 0.511 |
| Volume increase of screening compliance after pharmacy-based TO implemented, %8 | 10 |
| Variable data elements | |
| Prevalence of any diabetic retinopathy in Canada29,30 | 0.225 (range 0.169-0.281) |
| Screening intervention (TO) variables | |
| Proportion of patients who prefer TO for screening31 | 0.40 (0.50; 0.60; 0.70) |
| Proportion of patients examined with TO†31 | 0.225 (range 0.169-0.281) |
| Sensitivity32 | 0.84 (0.76-0.91) |
| Specificity32 | 0.94 (0.90-0.97) |
| Proportion of examinations with pupil dilation33 | 0.337 (0.25-0.47) |
| Proportion of unreadable images with pupil dilation32 | 0.054 (0.033-0.076) |
| Proportion of unreadable images without pupil dilation32 | 0.287 (0.139-0.435) |
| Current practice (in-person examination) variables | |
| Proportion of patients examined with current practice after introduction of TO†31 | 0.337 (range 0.253-0.421) |
| Sensitivity34 | 0.75 (0.67-0.83) |
| Specificity34 | 0.82 (0.79-0.86) |
Note: CI = confidence interval, TO = teleophthalmology.
*95% CI unless stated otherwise. Range or 95% CI interval used for deterministic sensitivity analysis.
†Based on published data estimates about proportion of patients screened after introduction of TO and patient preference regarding screening with TO.