Table 3 Prevalence of myopia, high myopia, mean spherical equivalent and axial length in grade 1 and grade 7 samples
From: Low prevalence of myopia among school children in rural China
Grade 1 Sample (n = 2432) | Grade 7 Sample (n = 2346) | P | |
|---|---|---|---|
Prevalence of myopia (SE < − 0.5 D) (%) | |||
Sex adjusted | 2.4 (1.1–3.7) | 29.4 (28.1–30.8) | < 0.001 |
Prevalence of high myopia (SE < −6.0 D) (%) | |||
Sex adjusted | 0.1 (0.0–0.3) | 0.4 (0.2–0.6) | < 0.001 |
Spherical equivalent (D) | |||
Sex adjusted | 0.87 (0.82–0.91) | −0.27 (−0.32- -0.22) | < 0.001 |
Multivariate adjusteda | 0.59 (0.37–0.80) | − 0.24 (− 0.31- -0.17) | < 0.001 |
Axial length (mm) | |||
Sex adjusted | 22.64 (22.61–22.67) | 23.60 (23.57–23.63) | < 0.001 |
Multivariate adjusteda | 23.07 (22.94–23.20) | 23.51 (23.47–23.55) | < 0.001 |