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  Thursday, 21 November 2019
  2 Replies
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Hi everyone, I hope someone can provide some insight here...

I'm a 45 year old male (non-black), i've been tracking my creatinine values the last few years as they were quite high, i;ve seen a broad range from 84 recently to a high of 132. A range of 47 ml/min seems pretty crazy, can we really have that much fluctuation in GFR? Could dehydration cause such a gap? Could differences be attributed to different labs? Optimistically i am hoping the lower creatinine is valid since if my kidney was actually damaged it would not regain functionality.

There was a extended period this summer values were not great (128,132) could this be due to something particular like a kidney infection or some temporary situation?

Recent urine tests revealed no protein. I don't have diabetes or HBP.

Anyhow some opinion on what is happening here would be great, if there cause for concern and what to do moving forwards.


* GFR calculated using ckd-epi equation (review on web says it is more accurate)

84 (GFR 112)
November 6, 2019
103 (GFR 87)
October 16, 2019
September 24, 2019
July 4, 2019
132 (GFR 65)
June 12, 2019
June 10, 2019
April 21, 2019
March 4, 2019
February 9, 2018
105 (GFR 106)
January 15, 2018
December 13, 2017
126 (GFR 70)
November 1, 2017
July 24, 2017
May 19, 2017
September 21, 2016
117 (GFR 77)
July 20, 2016
4 years ago
Hello -

1. What sort of urine test was this? A ‘dipstick’? Or a 24-hr urine collection/creatinine clearance?

2. Do you always measure your Creatinine in the same lab? Do you always measure it whilst fasted with some water before the test?

3. Do you follow a high protein diet or have a lot of muscle mass?

4 years ago

1. it was not a urine test, these were blood tests.
2. These were not all measured in the same lab, most were in the same one but the last one of 84 was in a different lab. Most were fasted, but the last 3 were not (interesting the creatinine was relatively lower then). I try to be hydrated before but it has not always been the case. Could fasting affect creatinine values?
3. I'm not on any special diet nor have alot of muscle mass.

I'm mainly trying to see if there is cause for concern here, ie is my GFR actually in the 60's or like the latest values show, relatively normal? I know with higher GFR there is a problem with accuracy and the idea is to look at the overall pattern over time but given my values i'm not seeing any really.

thank you!
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