Methods: Brachial artery flow-mediated dilation (FMD) was measured in the fasting state using high-resolution B-mode ultrasound in 272 Tibetan male subjects and 580 Han nationality subjects.

• 方法：在空腹状态下，使用B型超声对272例藏族男性和580例汉族男性进行肱动脉舒张功能检测。