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Differences in prevalence rate of health problems by level of urbanization (N = 53,053; Boy = 27,359, Girl = 25,694)
| Level of urbanization | Urban | Suburban | Rural | F-value | Scheffe's post hoc test | |||
| Health problem | M | SD | M | SD | M | SD | ||
| Myopia | 29.1 | 15.9 | 24.8 | 20.3 | 16.1 | 16.6 | 6.1** | R<U, S |
| Caries | 66.7 | 17.4 | 71.3 | 18.2 | 79.0 | 21.4 | 5.3** | U<R |
| Obesity | 8.5 | 6.2 | 10.3 | 6.9 | 7.4 | 7.1 | 1.8 | |
Statistically significant differences between levels of urbanization: ** indicates p < .01.
