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Sample data for the 2039 subjects and their ratios for age, sex, educational level, social status and correction.
| Number | Percent | |
|---|---|---|
| Age | ||
| 15–29 | 1372 | 71% |
| 30–45 | 667 | 29% |
| Sex | ||
| Male | 856 | 42% |
| Female | 1183 | 58% |
| Educational level | ||
| Basic | 337 | 16.5% |
| Medium | 767 | 37.6% |
| High | 935 | 45.9% |
| Social status | ||
| Basic | 964 | 47.3% |
| Middle | 557 | 27.3% |
| Well off | 518 | 25.4% |
| Wears glasses, CL (no reading) | ||
| Yes | 165 | 8.1% |
| No | 1874 | 91.9% |
