The characteristic of the study population (n=25 752)
| Number | Percentage | |
|---|---|---|
| Last eye clinic use | ||
| ≤1 month | 1728 | 6.7 |
| >1 month and ≤1 year | 6509 | 25.3 |
| >1 year and ≤3 years | 4829 | 18.8 |
| >3 years | 6199 | 24.1 |
| Never | 6487 | 25.2 |
| Sociodemographic factors | ||
| Age, years | ||
| 30–39 | 5475 | 21.3 |
| 40–49 | 5441 | 21.1 |
| 50–59 | 5353 | 20.8 |
| 60–69 | 4920 | 19.1 |
| 70 and over | 4563 | 17.7 |
| Sex | ||
| Men | 10 974 | 42.6 |
| Women | 14 778 | 57.4 |
| Monthly house income | ||
| Lowest quintile | 4779 | 18.8 |
| 2nd–4th quintile | 15 128 | 59.6 |
| Highest quintile | 5476 | 21.6 |
| Education | ||
| Elementary school | 7709 | 30.7 |
| Middle school | 3110 | 12.4 |
| High school | 7693 | 30.6 |
| University or higher | 6604 | 26.3 |
| Spouse | ||
| With | 21 130 | 84.3 |
| Without | 3920 | 15.7 |
| Residential area | ||
| Urban | 19 416 | 75.4 |
| Rural | 6336 | 24.6 |
| Comorbidities | ||
| Hypertension | ||
| No | 18 883 | 75.0 |
| Yes | 6303 | 25.0 |
| Diabetes mellitus | ||
| No | 22 866 | 90.8 |
| Yes | 2319 | 9.2 |
| Health behavioural factors | ||
| Abnormal alcohol use | ||
| No | 16 702 | 64.9 |
| Yes | 9050 | 35.1 |
| Lifetime smoker | ||
| No | 15 226 | 60.6 |
| Yes | 9893 | 39.4 |