The design consisted of face-to-face interviews of a nationally representative sample of more than 10,000 adolescents aged 13 to 18, with an average age of 15.
研究小组采取面对面访谈的方式，对全国1万余名年龄在13至18岁之间（平均年龄15岁）有代表性的青少年进行了抽样调查。
Researchers followed a sample of more than 2, 000 people, who were aged 65 or over when they took part in the General Household Survey in 1994.
研究人员对年龄在65岁或以上，参加了1994年综合住户统计调查的2000多人进行了跟踪考察。
The ordinal sample cluster method was used to study the distribution of blood pressure measurements by age for 2485 Mongolian children aged 4 to 14 in Zhemeng district.
本文用有序样品聚类方法对哲盟地区2485名4～14岁蒙古族儿童血压的年龄分期进行了聚类分析，以划分最优年龄段。
We carried out a dietary investigation of pupils aged 10-11 in Mei county in Shaanxi with level-based community random sample method.
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。
Methods A cluster sample of 8 054 students(aged 12-18 years) were chosen from 28 middle schools in Guangzhou.
方法采取整群抽样方法，对广州市28所中学12~18岁的中学生8 054名进行吸烟状况的问卷调查。
Methods With the method of questionnaire survey, a cluster sample of 3 012 students (aged 15-19) were investigated. They were chosen from Qinghai Province, Shanxi Province and Zhejiang Province.
方法选择青海省、山西省、浙江省各1个县，采用整群抽样的方法，共选取3 012名15 ~19岁在校中学生进行问卷调查。
Method: Based on a sample of 100 children aged 3 ~ 6, their social status and problematic behavior were assessed by method of questionnaire and sociometric measurement.
方法：采用社会测量法和问卷法对100名3 ~6岁幼儿的社交地位与问题行为进行评定。
Conclusion language sample analysis proves to be feasible in assessment of language development in preschool children aged 4 to 6 years.
结论语言样本分析能够反映4 ~ 6岁儿童的语言发育水平。
Objective To compare and observe the geographic distribution of nutrition status in Chinese male youth aged 17-21 years in different are as by larger sample survey.
目的通过大样本的抽样调查，观察和比较我国不同地区17～ 2 1岁男青年营养状况的地区分布特点。
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.
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 The sample was 3 259 normal Han Chinese children aged 2~19 years from five cities of China.
方法样本为广州市、上海市、温州市、大连市、石家庄市五城市3 259名2~19岁的中国汉族城市儿童。
Methods an investigation in Beijing urban districts was conducted in a cross-sectional survey. A total of 15 000 permanent residents aged 15-69 years as a sample was randomly interviewed.
方法采用现况研究方法，对北京城区15 0 0 0名15 ~ 6 9岁的常住居民进行入户调查，了解其慢性病患病情况及行为危险因素等。
Methods the study sample was got by multi-stage randomized sampling, and the injury information of the inhabitants aged over 18 years in Guangdong province was collected by questionnaire.
方法按分层整群抽样的方法抽取样本，并通过问卷调查的方式收集有关广东省18岁以上居民的伤害信息。
Methods the study sample was got by multi-stage randomized sampling, and the injury information of the inhabitants aged over 18 years in Guangdong province was collected by questionnaire.
方法按分层整群抽样的方法抽取样本，并通过问卷调查的方式收集有关广东省18岁以上居民的伤害信息。
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