Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
2014年及2016年被调查儿童的基本信息
Basic information of children investigated in 2014 and 2016
| Group | Number | Gender, n (%) | Age/years, x±s | |
| Male | Female | |||
| Year 2014 | 992 | 537 (54.1) | 455 (45.9) | 6.97±2.18 |
| Year 2016 | 896 | 516 (57.6) | 380 (42.4) | 6.91±2.67 |
| F or χ2 value | χ2=2.280 | F=0.473 | ||
| P value | 0.131 | 0.636 | ||
