Table 2.

Prevalence rate and categories of myopia

Variables	Myopia (%; 95% CI)	Myopia categories n (%)
		Low	Moderate	High
Total	33.9; 31.0–36.8	258 (76.3)	73 (21.6)	7 (2.1)
School region
Rural	30.1; 27.2–33.1	104 (80.6)	23 (17.8)	2 (1.6)
Urban	36.7; 33.8–39.7	154 (73.7)	50 (23.9)	5 (2.4)
Gender
Male	30.0; 27.1–33.0	120 (76.4)	35 (22.3)	2 (1.3)
Female	38.2; 35.2–41.1	138 (76.2)	38 (21.0)	5 (2.8)
Age (years)
7	9.9; 5.0–14.9	14 (100)	0 (0)	0 (0)
8	9.6; 4.7–14.6	12 (92.3)	1 (7.7)	0 (0)
9	24.8; 18.0–31.7	30 (78.9)	6 (15.8)	2 (5.3)
10	40.2; 33.0–47.4	58 (80.6)	13 (18.1)	1 (1.3)
11	52.8; 45.8–59.8	70 (68.0)	31 (30.1)	2 (1.9)
12	48.8; 41.4–56.3	62 (73.8)	20 (23.8)	2 (2.4)
13	63.6; 43.5–83.7	12 (85.7)	2 (14.3)	0 (0)

CI confidence interval