Table 1 The characteristics of myopia in children with different age and sex groups
Variables | Myopia N(%) | Non-Myopia N(%) | Total eyes N(%) | χ2 | P |
|---|---|---|---|---|---|
Age(years) | |||||
7~ | 887(41.33) | 1259(58.67) | 2146(44.93) | 160.69 | < 0.01 |
13 ~ 15 | 1162(60.14) | 770(39.86) | 1932(40.45) |  |  |
16 ~ 18 | 409(58.60) | 289(41.40) | 698(14.62) |  |  |
Sex | |||||
Male | 1130(48.09) | 1220(51.91) | 2350(49.20) | 20.90 | < 0.01 |
Female | 1328(54.74) | 1098(45.26) | 2426(50.80) | Â | Â |
Total | 2458(51.47) | 2318(48.53) | 4776(100) | Â | Â |