Table 3. Myopia incidence, SER and AL at 3-year follow-upa.
| Parameters | Control group | Intervention group | Difference (95%CI) | P |
| Cumulative incidence of myopia | ||||
| Incidence of myopia (%) | 207/784 (26.4)b | 164/774 (21.2)b | 5.2 (3.7, 10.1) | 0.035 |
| 3-year follow-up | ||||
| Axial length (mm) | 0.77±0.36 | 0.72±0.32 | 0.05 (0.01, 0.09) | 0.003 |
| Spherical equivalent refraction (D) | -0.81±1.06 | -0.63±0.90 | -0.18 (-0.28, -0.08) | <0.001 |
aThe calculation on all outcomes was based on right eye data only. bCumulative number of cases of incidence myopia/number of analyzed participants (%). SER: Spherical equivalent refraction; CI: Confidence interval; AL: Axial length.