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样本人群,按照地理分布选定成都、哈尔滨、上海、银川、广州及长沙为调查城市。以居民小组为单位,整群随机抽样确定各城市研究人群为1～1.1万人,六城市应调查人群65067人,实际调查63195人,占应查人口97.1%。应用世界卫生组织提供的统一调查表,预试验证明所检出的主要神经系统疾病具有高度敏感性。调查方式逐户家访。调查组每两人一组,均经过统一的技术培训,其中一名为神经科医生,以保证诊断的可靠性。
Sample population, according to the geographical distribution of selected Chengdu, Harbin, Shanghai, Yinchuan, Guangzhou and Changsha as the survey city. The residents group as a unit, the cluster random sampling to determine the urban research population of 1 ~ 11000 people, six cities should be investigated population of 65067 people, the actual survey of 63195 people, accounting for 97.1% of the population should be investigated. Using the harmonized questionnaire provided by the World Health Organization, pre-tests demonstrated that the major neurological diseases detected were highly sensitive. Survey by household visit. Every two people in the investigation team, after a unified technical training, one of the neurologists to ensure the reliability of diagnosis.