方法：分阶段分层整群随机抽样调查。
Methods. The survey was conducted according to multi-stage stratified cluster sampling method.
方法采取分层整群随机抽样方法进行问卷调查。
Methods Stratified cluster random sampling was carried out in prevalence survey and questionnaires was applied.
研究方法本研究采用分层整群随机抽样方法进行抽样。
RESEARCH METHODThe stratified multi-stage cluster random sampling method was used in the survey.
方法采用分层整群随机抽样的方法，对13个中签县市39个村(点)进行调查。
Methods Cluster random sampling was used for investigation of 39 villages selected from 13 counties.
本研究采用分层整群随机抽样方法，共调查农村6229户家庭，15667人。
A household survey was conducted over 6229 rural households in which there were 15667 persons through stratified and cluster sampling.
方法按照全国统一制定的调查方案，按病种以分层整群随机抽样的方法确定调查点。
Methods According to the national guidelines, clustered random sampling was made for the survey.
方法对社区人群采用多阶段分层整群随机抽样方法抽取研究对象，进行个案调查和血清学检测。
Methods Subjects were collected from community population by stratified multi-stage cluster sampling method. The data gathered from case investigation and serological detection.
方法采用分层整群随机抽样方法，询问调查抽中的广州市1级、2级和3级医院的一线临床医生。
Methods a questionnaire survey was conducted among the clinical doctors selected by stratified cluster random sampling from grade 1, 2 and 3 hospitals in Guangzhou.
方法：以简明精神症状自评量表(SCL 90)为测试工具，采用分层整群随机抽样研究方法。
Methods: Stratified cluster sampling method was used to choose students to complete "SCL 90 Mental Symptoms Table".
本文采用分层整群随机抽样的方法，调查了陕西省眉县农村10 ~ 11岁小学生的膳食摄入情况。
We carried out a dietary investigation of pupils aged 10-11 in Mei county in Shaanxi with level-based community random sample method.
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方法在抽取的社区居委会，用老年抑郁量表(GDS)对528名社区老年人进行筛查。
Methods: in the communities chosen by stratified cluster random sampling method, we used Geriatric Depression Scale (GDS) to screen about 528 old people to identify the depressed ones.
方法根据全国第四次结核病流行病学抽样调查方案，采用分层整群随机抽样方法抽取调查点，然后根据调查结果进行分析。
Methods According with the methods of the forth epidemiologic sampling survey for tuberculosis in our country, the method of stratified cluster random sampling was use in this survey.
方法采用分层整群随机抽样的方法，从长沙地区高校中随机抽取20个班级，对所选班级的上网大学生进行现场无记名问卷调查。
Methods An anonymous questionnaire was conducted on 1 040 internet users, who were cluster stratified sampled from 20 classes in Changsha colleges.
方法采取分层整群随机抽样的方法，对市内四个区11所学校的2 2 0 4名12～21岁的在校学生进行不记名问卷调查。
Methods A sample survey based on stratified probability samples of 2 204 students aged 12~21 years old among 11 schools in four districts of Shanghai was carried out.
对象与方法：研究对象采取分层整群随机抽样的方法，在大连市4所高校大一、大四年级学生中发放问卷800份，收回有效问卷726份。
Methods: By using questionnaires with multistage stratified random cluster sampling method, 726 valid questionnaires of 800 were backed from the university students in 4 universities in Dalian city.
方法：本研究采用分层随机抽样方法和整群随机抽样方法。
Methods: The stratified sampling and cluster random sampling methods are used in this survey.
在5个城市作整群分层随机抽样调查确定与事故倾性有关指标的正常值范围。
The normal value range of indicators about accident proneness were detected according to epidemiological survey results using stratified random cluster sampling in 5 cities.
结论：推导并建立多重分层、整群随机抽样误差的计算公式。
CONCL USION: the calculation formulas of multiple - stratifying and clustering random sampling are theoretically set up.
方法采用整群分层随机抽样的方法，对吉林市某医学院校及非医学高校的在校大学生进行问卷调查。
Methods With the method of cluster stratified random sampling, a questionnaire survey was conducted in medical and non-medical higher-educated school in Jilin city.
方法采用整群分层随机抽样的方法，对吉林市某医学院校及非医学高校的在校大学生进行问卷调查。
Methods With the method of cluster stratified random sampling, a questionnaire survey was conducted in medical and non-medical higher-educated school in Jilin city.
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