中国儿童青少年身体攻击的发生状况：基于潜在类别分析的结果

Prevalence of Physical Aggression in Chinese Adolescents: Based on Latent Class Analysis

目的：了解中国儿童青少年身体攻击的发生状况。方法：利用中国儿童青少年心理发育特征调查数据库，对23753名中国4—9年级学生的身体攻击进行潜在类别分析，并对不同身体攻击类别在不同性别和年级内的分布进行差异检验。结果：①4—9年级学生的身体攻击分为三个潜在类别：高发组、边缘组和低发组，比例分别为：5．2％、36．7％、58．1％；②男生高发组、边缘组的比例（4．5％、44．6％）显著高于女生（1．9％、22．8％）；③4—9年级学生高发组的比例在6．8％-1．4％，呈现随年级升高而下降的趋势，边缘组的比例在30．2％-37．0％。结论：身体攻击可以分为三类，每个类别在不同性别和年级内部的分布不同。

Objective： To investigate the prevalence of physical aggression in Chinese adolescents. Methods： The data used in this study were from database of the National Children＇ s Study of China （NCSC）. Latent class analysis （LCA） was used to explore types of physical aggression of 23,753 students in fourth-to-ninth-grade, and Percentage Difference Test was employed to investigate the difference of frequency in different gender and grade. Results： （1）According to LCA, fourth-to-ninth-grade students＇ physical aggression could be divided into three groups, namely, High-risk group, Medium-risk group, low-risk group, the prevalence were 5.2%, 36.7%, 5g.1%, respectively. （2）The prevalence of High-risk group and Medium-risk group of boys（4.5%,44.6%） was significantly higher than girls（1.9%, 22.8%）. （3）Within fourth-toninth-grade, the prevalence of High-risk group was 1.4% to 6.8%, showing a decline with the increasing of grade, and the prevalence of Medium-risk group was 30.2% to 37.0%. Conclusion： Physical aggression can be classified into three different types; The prevalences of each type is different in different gender and grade.