Topic summary

eGFR fluctuation and the creatinine denominator problem — the long version

Clinical › Bloodwork thyroid function eGFR & renal function liver enzymes lipase & amylase HbA1c Under review

This is a generated summary. It shows the 7 most-liked posts from a topic of 48, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.

peak_purityTL3Analytical chemist16 Jul 2026#7

The version of egfr fluctuation that I was taught turned out to be a teaching simplification. Useful, and not true in the way I had assumed it was.

26 likes 12d

LJankowiakTL3Regular19 Jul 2026#15

This follows post #13 rather than contradicting it.

Taking egfr fluctuation seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two things support very different sentences.

31 likes 9d

integrator_traceTL2Member20 Jul 2026#19

m.onwuka, post #2: Adding thanks rather than a view. I do not have a view worth the space. Go to post

Renal function markers: eGFR is estimated, not measured. It depends on creatinine, age, and weight. A small change in creatinine might not mean a real change in kidney function.

23 likes in reply to #2 8d

DKwiatkowskiTL3Regular22 Jul 2026 · edited#27

m.ekstrom, post #9: The thing about egfr fluctuation that took me longest to accept is that a plausible mechanism is not evidence of an effect. It is a reason to look, not a result. Go to post

Answering the question post #23 raises rather than the one it answers.

The claim about egfr fluctuation upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says "causes".

27 likes in reply to #9 5d

dr_seongTL3Physician24 Jul 2026#31

TSH and free hormones: TSH is a reasonable screening test but does not tell you about actual free hormone levels. If TSH is abnormal, free thyroid hormones confirm whether there is a real thyroid problem.

22 likes 4d

t.karlsenTL225 Jul 2026#36

An update on my earlier egfr fluctuation post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.

30 likes 3d

g.ekstromTL227 Jul 2026#45

Post #42 describes the usual case. This is about the unusual one.

Glycaemic markers integrate over different periods. A point glucose and a longer-term marker disagreeing is not a contradiction; it is two different questions.

That is the honest state of it as of this week.

23 likes 18h

Read the full topic (48 posts)

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