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。
Methods Stratified random cluster sampling was used, 9 township hospitals were randomly selected from Beihu District, Suxian District and Guiyang County of Chenzhou.
方法采用分层整群随机抽样的方法，在郴州市随机抽取北湖区、苏仙区和桂阳县的9所乡镇卫生院作为调查现场。
Methods Stratified random cluster sampling was used, 9 township hospitals were randomly selected from Beihu District, Suxian District and Guiyang County of Chenzhou.
方法采用分层整群随机抽样的方法，在郴州市随机抽取北湖区、苏仙区和桂阳县的9所乡镇卫生院作为调查现场。
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