| N | Myopia | Prevalence rate | Mean D | SD | F* | |
| Age (y) | ||||||
| 6 to 9 | 3107 | 452 | 14.55% | 0.08 | 0.02 | 131.57 |
| 10 to 13 | 4120 | 1660 | 40.29% | −0.88 | 0.03 | |
| 14 to 16 | 4547 | 2720 | 59.82% | −1.80 | 0.03 | |
| 17 or more | 3542 | 2384 | 67.31% | −1.97 | 0.06 | |
| Gender | ||||||
| Male | 7434 | 3518 | 47.32% | −1.04 | 0.03 | 64.55 |
| Female | 7882 | 4326 | 54.88% | −1.33 | 0.02 | |
| Number of parent with myopia | ||||||
| 0 | 9893 | 4647 | 46.97% | −1.83 | 0.62 | 84.39 |
| 1 | 3883 | 2234 | 57.53% | −1.19 | 0.02 | |
| 2 | 1540 | 963 | 62.53% | −4.26 | 0.97 | |
| Father’s completed level of education | ||||||
| Primary education | 425 | 177 | 41.65% | −0.86 | 0.09 | 29.04 |
| Secondary education | 3969 | 1792 | 45.15% | −0.86 | 0.04 | |
| Polytechnic education | 4004 | 2044 | 51.05% | −1.18 | 0.03 | |
| Tertiary education | 6644 | 3683 | 55.43% | −1.41 | 0.03 | |
| Reading or writing distance | ||||||
| Greater than 33 cm | 1374 | 481 | 35.01% | −0.54 | 0.15 | 78.58 |
| About 33 cm | 7280 | 3505 | 48.15% | −1.06 | 0.02 | |
| Less than 33 cm | 6556 | 3818 | 58.24% | −1.46 | 0.03 | |
| Hours of sports per day | ||||||
| 30 min or less | 3708 | 1947 | 52.51% | −1.19 | 0.04 | 8.19 |
| 30 min to 1 hour | 6990 | 3657 | 52.32% | −1.27 | 0.03 | |
| 1 hour or more | 4448 | 2172 | 48.83% | −1.07 | 0.03 | |
| Hours of watching TV per day | ||||||
| 1 hour or less | 6471 | 3472 | 53.65% | −1.29 | 0.03 | 9.4 |
| 1 to 2 hours | 5741 | 2827 | 49.24% | −1.14 | 0.03 | |
| 2 hours or more | 3009 | 1502 | 49.92% | −1.06 | 0.05 | |
| Hours of studying per day | ||||||
| 6 hours or less | 2085 | 1406 | 67.43% | −0.71 | 0.03 | 113.79 |
| 6 to 8 hours | 3265 | 2013 | 61.65% | −0.99 | 0.03 | |
| 8 to10 hours | 6457 | 3013 | 46.66% | −1.64 | 0.04 | |
| 10 hours or more | 3365 | 1349 | 40.09% | −1.89 | 0.05 | |