Univariable analyses for associations between demographic characteristics and grey crescent among glaucoma cases
| Grey crescent present (N=284 eyes) | Grey crescent absent (N=2582 eyes) | P value | |
| Age (years) | <0.0001 | ||
| Mean (SD) | 66.2 (11.2) | 70.1 (11.2) | |
| Median (IQR) | 67.0 (58.0–73.5) | 71.0 (62.0–78.0) | |
| Range | 35.0–96.0 | 35.0–103.0 | |
| Age groups, n (%) | 0.001 | ||
| 33–60 | 90 (31.7) | 555 (21.5) | |
| 60–69 | 72 (25.4) | 637 (24.7) | |
| 69–79 | 88 (31.0) | 827 (32.0) | |
| 79–103 | 34 (12.0) | 563 (21.8) | |
| Gender, n (%) | 0.98 | ||
| Male | 114 (40.1) | 1034 (40.0) | |
| Female | 170 (59.9) | 1548 (60.0) | |
| Diabetes, n (%) | 0.03 | ||
| No | 150 (53.0) | 1567 (60.9) | |
| Yes | 133 (47.0) | 1004 (39.1) | |
| Unknown | 1 | 11 | |
| Hypertension, n (%) | 0.23 | ||
| No | 68 (23.9) | 527 (20.5) | |
| Yes | 216 (76.1) | 2047 (79.5) | |
| Unknown | 0 | 8 | |
| Family history of glaucoma, n (%) | 0.76 | ||
| No | 110 (40.9) | 1015 (42.0) | |
| Yes | 159 (59.1) | 1401 (58.0) | |
| Unknown | 15 | 166 | |
| Tobacco use, n (%) | 0.32 | ||
| No | 139 (49.5) | 1167 (45.9) | |
| Yes | 142 (50.5) | 1377 (54.1) | |
| Unknown | 3 | 38 | |
| Alcohol use, n (%) | 0.35 | ||
| No | 146 (52.1) | 1411 (55.6) | |
| Yes | 134 (47.9) | 1129 (44.4) | |
| Unknown | 4 | 42 | |
| Ancestry (q0) | 0.001 | ||
| Missing | 110 | 922 | |
| N | 174 | 1660 | |
| Mean (SD) | 0.22 (0.15) | 0.27 (0.20) | |
| Median (IQR) | 0.20 (0.10–0.31) | 0.23 (0.13–0.36) | |
| Range | 0.00–0.72 | 0.00–1.00 |