Table 1 Comparison of baseline characteristics between students of elementary and junior high schools (n = 5417)
From: Prevalence and associated factors of myopia among rural school students in Chia-Yi, Taiwan
Elementary school (aged 7–12) (n = 4763) | Junior high school (aged 13–15) (n = 654) | P-value | |
|---|---|---|---|
mean ± SD or n (%) | mean ± SD or n (%) | ||
Male | 2491 (52.3) | 368 (56.3) | 0.03 |
Body Height (cm) | 136 ± 12 | 157 ± 11 | < 0.001 |
BMI (kg/m2) | 18.8 ± 4.1 | 21.3 ± 4.7 | < 0.001 |
Spherical Equivalent (SE), OD (diopter) | − 1.06 ± 1.72 | −1.86 ± 1.99 | < 0.001 |
Intraocular pressure (IOP),OD (mmHg) | 17.2 ± 4.3 | 17.27 ± 4.4 | 0.66 |
Sleep duration, ≧8 h/day | 4045 (84.9) | 418 (63.9) | < 0.001 |
Ocular alignment | 0.68 | ||
Orthophoria | 2518 (52.9) | 338 (51.7) | |
Horizontal heterophoria | 1923 (40.4) | 275 (42.0) | |
Tropia | 332 (6.8) | 41 (6.3) | |
Myopia | < 0.001 | ||
Hyperopia | 51 (1.1) | 0 (0.0) | |
No Myopia | 2721 (57.1) | 262 (40.1) | |
Myopia | 1910 (40.1) | 365 (55.8) | |
High Myopia | 81 (1.7) | 27 (4.1) |