Methods Chester sampling survey was employed in this study. 22 communities and 30 villages in 7 counties were selected and 15384 individuals were investigated.

• 方法 国际通用血压测量方法和质控标准 ,对全区七个县人口进行整群随机抽样调查 ,2 2个居委会和 3 0个自然村入选 ,共调查1 5 3 84人 ,根据年龄分为 1 4组 ,5岁为一年龄段。