| 1. | Methods : random cluster sampling method was used . 2763 subjects were studied with a self - reported questionnaire
方法：采用整群随机抽样方法，对2763名学生通过自填问卷的方式进行了调查。 |
| 2. | Methods a multi - stage stratified measure was carried out to select 6 597 families from eleven counties ( cities ) in hubei province in 2003
方法利用第3次国家卫生服务调查问卷，采用多阶段分层整群随机抽样方法，对全省11个县市（区） 6597个样本住户的家庭成员进行入户问卷调查。 |
| 3. | In order to study the awareness , treatment and control rates andthe risk factors of hypertension in qingdao rural residents , a cluster random sampling method was used
为了调查青岛农村居民高血压的患病率、知晓率、服药率、控制率及其影响因素，采用整群随机抽样法，对7个村的18岁以上居民进行血压测量及相关因素调查。 |
| 4. | Methods a self - administered questionnaire was delivered to local residents in order to get information on the responsiveness of clinic patients . 4 communities , 202 local residents were recruited by cluster - randomized sampling
方法采用整群随机抽样的方法抽4个社区，对一年内有住院经历的加2名病人由调查员询问并填写调查表。 |
| 5. | Methods one thousand six hundred and sixteen children in school under 16 years old that were sampled in cluster sampling were examined with dental fluorosis , x - ray in the type of burning coal pollution fluorosis areas of zhijin county guizhou province
方法按照整群随机抽样方法从贵州省织金县随机选择16岁以下的在校学生1616人，进行氟斑牙和x线检查。 |
| 6. | In this study three scales were used to measure a sample of 802 students selected from 4 middle schools by hierarchical random group sampling , and 766 available copies of scales were adopted to collect data which was processed with spss 10 . 0
本研究采用量表测量法，以分层整群随机抽样法抽取样本。从四所中学随机抽取初中和高中14个自然班共计802人组成样本，有效问卷766份。 |
| 7. | In order to understand the childhood behavior disorder and suicide ideation in primary school studens in changsha city , and to identify factors affecting childhood behavior disorder and suicide ideation of children , 1060 primary school students , 796 persons from urban areas and 264 from rural area , were randomly sampled from six primary schools in changsha by multiple cluster sampling
为了了解长沙市城乡小学生的行为问题、自杀意念以及它们的影响因素，本研究采用多级整群随机抽样法，在长沙市城乡随机抽取六所学校的1060人(城市796人，乡村264人)为研究对象。 |
