...整群抽样调查 [gap=1471]rental rearing patterns; middle school student; personality traits; correlation; cluster sampling study ...
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Method:A cluster sampling study on the condition of injuries was conducted among 1059 rural inhabitants in a certain township in Tongjiang County, Sichuan province from Jan 1998~Jan 1999.
方法：采用整群抽样方法，对四川省通江县某乡1059名农村居民一年中伤害发生情况进行调查。
Method cluster sampling and cross sectional study.
方法整群抽样，横断面调查。
DESIGN: Randomized cluster sampling, cross-sectional study.
设计：随机整群抽样，横断面调查。
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