Table 2.
Overall prevalence of photographic features across all follow-up examinations, in order of decreasing prevalence
| Feature | No. of examinations at which feature was graded* |
No. of examinations at which feature was present |
Overall prevalence (%) |
|---|---|---|---|
| Macular microaneurysms | 742 | 561 | 75.6 |
| Macular angiographic leakage | 728 | 547 | 75.1 |
| Optic disc hyperfluorescence | 748 | 470 | 62.8 |
| Macular capillary nonperfusion | 658 | 378 | 57.4 |
| Peripapillary microaneurysms | 701 | 355 | 50.6 |
| Macular retinal hemorrhage | 935 | 435 | 46.5 |
| Macular telangiectasia | 863 | 394 | 45.6 |
| Macular hard exudates | 933 | 387 | 41.5 |
| Macular vascular sheathing | 870 | 274 | 31.5 |
| Peripapillary telangiectasia | 877 | 260 | 29.6 |
| Peripapillary retinal hemorrhage | 940 | 254 | 27.0 |
| Peripapillary capillary nonperfusion | 664 | 178 | 26.8 |
| Peripapillary vascular sheathing | 882 | 229 | 26.0 |
| Macular cotton wool spots | 922 | 211 | 22.9 |
| Peripapillary hard exudates | 937 | 194 | 20.7 |
| Macular RPE atrophy | 918 | 151 | 16.4 |
| Peripapillary cotton wool spots | 930 | 152 | 16.3 |
| Optic disc pallor | 911 | 104 | 11.4 |
| Macular laser scars | 945 | 77 | 8.2 |
| Optic disc hemorrhage | 912 | 65 | 7.1 |
| Macular retinal detachment | 944 | 54 | 5.7 |
| Peripapillary laser scars | 954 | 43 | 4.5 |
| Neovascularization of the disc | 911 | 34 | 3.7 |
| Macular vitreous hemorrhage | 954 | 27 | 2.8 |
| Optic disc edema | 919 | 25 | 2.7 |
| Macular subretinal hemorrhage | 947 | 24 | 2.5 |
| Peripapillary vitreous hemorrhage | 954 | 22 | 2.3 |
| Macular preretinal hemorrhage | 949 | 19 | 2.0 |
| Peripapillary subretinal hemorrhage | 951 | 7 | 0.7 |
| Peripapillary preretinal hemorrhage | 951 | 5 | 0.5 |
Not all features could be graded at every examination depending on photograph quality and availability of a fluorescein angiogram.
RPE = Retinal pigment epithelium