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Table 4 Prevalence of myopia by different criteria

From: Refractive errors and risk factors for myopia in infants aged 1–18 months in Tianjin, China

Parameter Myopia categories
(SE at least −0.50 D) (SE at least −1.00 D)
Age in months n (%) n (%)
P 0.129 0.793
1–3 4 (2.9%) 4 (2.9%)
3–6 4 (2.8%) 2 (1.4%)
6–9 12 (7.7%) 6 (3.8%)
9–12 4 (4.1%) 2 (2.7%)
12–18 6 (8.5%) 2 (2.8%)
Total 30 (5.1%) 16 (2.7%)
Gender
P 0.035 0.029
Boys 10 (3.2%) 4 (1.3%)
Girls 20 (7.0%) 12 (4.4%)