Table 1.
Characteristics of the three age groups of children (N = 557).
| Characteristics | Group I 10–11 years (n = 152) |
Group II 12–13 years (n = 178) |
Group III 14–15 years (n = 227) |
p-Value |
|---|---|---|---|---|
| Mean (SE) | Mean (SE) | Mean (SE) | ||
| Age | 10.7 (0.04) | 12.4 (0.04) | 14.5 (0.03) | <0.001 |
| Spherical equivalent (D) | −0.94 (0.12) | −1.00 (0.10) | −1.24 (0.13) | 0.17 |
| Gender (N, %) | 0.09 | |||
| Male | 90 (59%) | 91 (55%) | 110 (48%) | |
| Female | 62 (41%) | 87 (45%) | 117 (52%) | |
| Refractive error (N, %) | 0.06 | |||
| Myopia | 82 (54%) | 106 (60%) | 139 (61%) | |
| Emmetropia | 65 (43%) | 60 (34%) | 68 (30%) | |
| Hypermetropia | 5 (3%) | 12 (6%) | 20 (9%) | |
| Spherical aberration (N, %) | 0.11 | |||
| Positive | 82 (54%) | 102 (57%) | 152 (67%) | |
| Negative | 70 (46%) | 76 (43%) | 75 (33%) |