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Glomerular Filtration Rate(GFR) Test

* Stage 1 CKD is marked by GFR ≥90 mL/min/1.73 m2 which is usually considered in the normal range. However, through other tests, we can see there is pathological abnormalities or makers of damages.

* Stage 2 CKD is characterized by mild reduction in GFR (60-89mL/min/1.73m2).

* Stage 3 CKD: in stage 3 CKD, there is moderate reduction in GFR 30-59mL/min/1.73m2.

* Stage 4 CKD: For people with stage 4 CKD, their GFR has decreased to 15-29mL/min/1.73m2.

* Stage 5 CKD: Stage 5 CKD refers to kidney failure. In this stage, GFR is usually lower than 15mL/min/1.73m2.