Baseline characteristics of participants in the Yangxi Eye Study
| Baseline characteristics | Participants | Non-participants | P value | |
| Alive at follow-up | Deceased at follow-up | |||
| No (%) | 3187 (64.4) | 1759 (30.2) | 879 (15.1) | |
| Age (SD)* | 65.0 (9.0) | 64.5 (10.7) | 75.7 (9.6) | <0.001 |
| Age (years) | ||||
| 50–59 | 993 (31.2%) | 698 (39.7%) | 59 (6.7%) | |
| 60–69 | 1224 (38.4%) | 524 (29.8%) | 168 (19.1%) | |
| 70–79 | 738 (23.2%) | 328 (18.6%) | 287 (32.7%) | |
| 80+ | 232 (7.3%) | 209 (11.9%) | 365 (41.5%) | |
| BMI (SD)* | 22.44 (3.30) | 22.45 (3.20) | 21.23 (3.19) | <0.001 |
| PVA (SD), logMAR* | 0.41 (0.49) | 0.37 (0.46) | 0.69 (0.65) | <0.001 |
| BCVA (SD), logMAR* | 0.39 (0.57) | 0.39 (0.55) | 0.63 (0.70) | <0.001 |
| Sex* | ||||
| Male | 1465 (46.0%) | 802 (45.6%) | 538 (61.2%) | |
| Female | 1722 (54.0%) | 957 (54.4%) | 341 (38.3%) | <0.001 |
| Any formal education* | ||||
| No | 1522 (47.8%) | 808 (45.9%) | 536 (60.9%) | |
| Yes | 1665 (52.2%) | 951 (54.1%) | 343 (39.1%) | 0.01 |
| Diabetes present | ||||
| No | 2876 (91.0%) | 1570 (90.6%) | 748 (88.1%) | |
| Yes | 284 (9.0%) | 163 (9.4%) | 101 (11.9%) | 0.11 |
| Hypertension present* | ||||
| No | 1750 (55.2%) | 944 (54.4%) | 312 (36.7%) | |
| Yes | 1420 (44.8%) | 791 (45.6%) | 537 (63.3%) | ＜0.001 |
*p <0.05 (comparison of participants and non-participants).
BCVA, best-corrected visual acuity; BMI, body mass index; logMAR, logarithm with a minimum angle of resolution; PVA, present visual acuity.