Distributions of angle status and grades by cohort and dataset
| CHES train (N=3396) (%) | CHES test (N=640) (%) | Singapore (N=10 165) (%) | USC (N=300) (%) | |
| Angle status | ||||
| Closed | 1764 (51.9) | 329 (51.4) | 570 (5.6) | 66 (22.0) |
| Open | 1632 (48.1) | 311 (48.6) | 9595 (94.4) | 234 (78.0) |
| Gonioscopy grade | ||||
| 0 | 808 (23.8) | 149 (23.3) | 196 (1.9) | 30 (10.0) |
| 1 | 956 (28.2) | 180 (28.1) | 374 (3.7) | 36 (12.0) |
| 2 | 360 (10.6) | 65 (10.2) | 1174 (11.5) | 32 (10.7) |
| 3 | 898 (26.4) | 175 (27.3) | 3718 (36.6) | 80 (26.7) |
| 4 | 374 (11.0) | 71 (11.1) | 4703 (46.3) | 122 (40.7) |
CHES, Chinese American Eye Study; USC, University of Southern California.