Final screening outcomes at each grading level
| Screening outcome | Level 1 | Level 2 | Level 3 | Total No (%) (95% CI) |
|---|---|---|---|---|
| NA, not applicable as these outcomes could not be assigned at this level. | ||||
| Re-screening in 12 months | 3149 (56.5%) | 1368 (24.5%) | 79 (1.4%) | 4596 (82.4) (81.5 to 83.4) |
| Re-screening in 6 months | NA | 107 (1.9%) | 21 (0.4%) | 128 (2.3) (1.9 to 2.7) |
| Referral for slit lamp biomicroscopy | NA | 649 (11.6%) | 12 (0.2%) | 661 (11.9) (11.0 to 12.7) |
| Referral to ophthalmology | NA | NA | 190 (3.4%) | 190 (3.4) (3.0 to 3.9) |