Table 1.
Fundus fluorescein angiography dataset characteristics
| Total | Train | Validation | Test | p value | |
|---|---|---|---|---|---|
| Population | |||||
| No. | 9,392 | 5,761 | 1,603 | 2,028 | |
| Age, median (IQR) | 51 (36, 62) | 51 (37, 62) | 50 (36, 61) | 50 (33, 62) | 0.009 |
| Sex, n (%) | 0.972 | ||||
| Female | 4,202 (44.7) | 2,583 (44.8) | 714 (44.5) | 905 (44.6) | |
| Male | 5,190 (55.3) | 3,178 (55.2) | 889 (55.5) | 1,123 (55.4) | |
| Year, n (%) | <0.001 | ||||
| 2016 | 622 (6.6) | 622 (10.8) | 0 (0) | 0 (0) | |
| 2017 | 3,536 (37.6) | 3,536 (61.4) | 0 (0) | 0 (0) | |
| 2019 | 5,234 (55.7) | 1,603 (27.8) | 1,603 (100) | 2,028 (100) | |
| FFA images | |||||
| No. | 654,343 | 382,621 | 116,195 | 155,527 | |
| Phasea, n (%) | <0.001 | ||||
| Arterial | 38,231 (5.8) | 24,271 (6.3) | 6,960 (6.0) | 7,000 (4.5) | |
| Arterial-venous | 7,888 (1.2) | 4,866 (1.3) | 1,368 (1.2) | 1,654 (1.1) | |
| Venous | 366,450 (56.0) | 212,707 (55.6) | 65,349 (56.2) | 88,394 (56.8) | |
| Late | 241,774 (36.9) | 140,777 (36.8) | 42,518 (36.6) | 58,479 (37.6) | |
IQR, interquartile range; FFA, fundus fluorescein angiography.
a
Arterial: 20 to 30 s; Arterial-venous: 30 to 60 s; Venous: 60 s to 5 min; Late: 5 to 10 min.