这项评估在两年的时间里研究了卢旺达401个初级服务机构中的166个机构。它的结论是根据13个随机抽样、居住在卫生所服务覆盖地区的当地家庭做出的。
The evaluation studied 166 of Rwanda's 401 primary care facilities over a 2-year period; its findings were based on random samples of 13 households living in local areas served by the clinics.
方法采用分层整群抽样方法，对温州地区9742名7 ~ 16岁的中小学生进行TD横断面调查。
Methods Stratified cluster sampling was carried out to investigate TD in 9742 schoolchildren aged 7 to 16 years old in Wenzhou.
本文对浙北地区的6～18周岁儿童少年人群进行抽样调查，对肥胖流行率及其性别差异性进行了初步研究。
The aim of this study was to investigate the obesity prevalence of north-Zhejiang region in 6~18 children and adolescence.
应用推荐