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Living Long-Term at Stage 4 Kidney Disease

Kidney & Bladder | Last Active: May 23 1:50pm | Replies (17)
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@siosal

Hi
My EGFR for the last 9 yrs(since diagnosis) has been as high as 75 and as low as 48.
I just had my first cystatin c test. It came out at 34!!!!
Thats scary and leaves me wondering od my kidneys are taking a slide downwards.

Most of my other kidney related labs are normal or close to normal.

Can someone explain why the 2 egfrs are so different?

Thank you.

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Replies to "Hi My EGFR for the last 9 yrs(since diagnosis) has been as high as 75 and..."
Ginger, Volunteer Mentor | @gingerw | May 22 6:19pm

@siosal Usually most labs and nephrologists use the creatinine test for eGFR. This can be influenced by hydration/diet/stress/activity level and several other factors. Even the lab performing the test.

From what I have read, cystatin C test is not very influenced by body mass or diet, and can give a more accurate picture of true kidney function. @collegeprof, please correct me is I am wrong.

Have you spoken to your nephrologist about thr results of your latest tests, yet?
Ginger

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