From: Morbidity at elementary school entry differs by sex and level of residence urbanization: a comparative cross-sectional study
Level of urbanization
Urban
Suburban
Rural
F-value
Scheffe's post hoc test
Health problem
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