Sample demographic and refractive characteristics
| N | Age (mean±SD) | Gender (female, %) | Sphere (mean±SD) | |
| Age groups | ||||
| All | 136 333 | 11.3±3.8 | 55.0 | −2.10±1.80 |
| 4–6 | 19 179 | 5.0±0.8 | 51.9 | −1.90±1.67 |
| 7–9 | 25 830 | 8.1±0.8 | 52.5 | −1.78±1.57 |
| 10–12 | 33 319 | 11.1±0.8 | 55.3 | −2.03±1.72 |
| 13–15 | 36 861 | 14.0±0.8 | 56.5 | −2.29±1.90 |
| 16–17 | 21 144 | 16.5±0.5 | 57.6 | −2.48±1.99 |
| With progression status | 88 604 | 11.0±3.8 | 54.8 | −2.12±1.80 |
| With progression status and follow-up | 50 516 | 10.4±3.6 | 53.4 | −2.20±1.84 |
| Progressors | 13 795 | 10.2±3.2 | 55.3 | −2.37±1.92 |
| Non-progressors | 36 721 | 10.7±3.7 | 52.7 | −2.14±1.81 |
| Mild or moderate myopia | 130 678 | 11.2±3.8 | 55.0 | −1.85±1.27 |