Table 1
Summary of basic information for children
Variable
Characteristics
N (%)
Age (years)
7
102 (15.6)
8
380 (58.4)
9
169 (26.0)
Gender
Male
332 (51.0)
Female
319 (49.0)
Grade
2
241 (37.0)
3
410 (63.0)
Only-child or not
Yes
324 (49.8)
No
327 (50.2)