There were no differences in ARL and RRL in the subgroups divided by grade 3 or 2 hypertension in two hypertensive groups(P>0.05).

• 按血压达2级或3级水平分为亚组后；高血压肾功能正常组及高血压肾功能异常组组内各血压水平亚组间双侧肾脏ARL、RRL均无显著性差异(P>0.；05)。