IntroductionChronic kidney disease (CKD) is an important public health problem and accurate estimation of the glomerular filtration rate (GFR) is essential for evaluating the stage of kidney function of patients with CKD.

• 引言慢性肾脏病(chronic kidney disease,CKD)是一个日益引起公众关注的健康问题,而肾小球滤过率(glomerular filtrateion rate,GFR)的准确评估是评价慢性肾脏病患者肾功能分期所必需的。