For each subject,blood pressure was measured from the same arm and with devices in the same order(mercury sphygmomanometer,Omron HEM-7000,mercury sphygmomanometer,Omron HEM-6001 and mercury sphygmomanometer).

• 按水银柱式血压计、欧姆龙HEM-7000、水银柱式血压计、欧姆龙HEM-6001、水银柱式血压计的顺序测定同一侧上臂的血压。