how much of what we believe about eGFR actually comes from ferritin threads
how much of what we believe about eGFR actually comes from ferritin threads. Searched first, found three threads that contradict each other, hence the post.
Tracked ferritin against the weight trend for a year. The correlation was much weaker than I expected and that was worth knowing.
Draw at the same point in the week now, fasting, same lab. The noise dropped enormously once I standardised.
Why so many single values look alarming and turn out to be nothing.
A reference interval is built to contain about 95% of a healthy reference population, so one test in twenty falls outside one by construction. Add biological variation, assay imprecision, fasting state and time of day, and a genuinely stable person will produce occasional out-of-range results.
That is why repeat testing before acting is standard. Regression to the mean handles most of it. None of which means an out-of-range value should be ignored — it means it should be repeated and taken to somebody who can put it in context, which is emphatically not a ranked feed.
Screenshot none of this. Read the whole thread, including the parts where I am told I am wrong.
best — the order this archive was captured in
Substantial weight loss independently moves lipids, liver enzymes and several other markers. Attributing a change to a compound while losing weight is confounded by design.
Brought the whole set to my clinician rather than one flagged value. Completely different conversation.
Substantial weight loss independently moves lipids, liver enzymes and several other markers.
Agreed — and standardising the draw conditions is the cheapest improvement available.
Is that the same assay, or did the lab change platforms?
hydration status moves a surprising number of markers
Do you have a baseline from before you started?
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Right, and weight loss itself moves several markers, so attribution is harder than these threads assume.
baseline before you start is worth more than any later panel
ask whether the lab changed its assay between your two draws
Nobody here can interpret your panel and this comment is not doing so. What a board can usefully do is help you ask better questions of somebody who can.
Standing reminder: nobody here interprets your results, and posts asking us to get a pointer to somebody who can.
Standing reminder: nobody here interprets your results, and posts asking us to get a pointer to somebody who can.
Adding the obvious one — take it to whoever ordered the panel. This board cannot read it for you.
Correction: that marker is reported in different units by different labs, which explains the tenfold difference you are seeing.
assay method matters, especially between different labs
Cosigning on baseline. The panel I regret most is the one I did not take before starting.
ApoB is the one worth adding if you only add one
Compared two draws across two labs and spent a week worrying before finding out the assays were different.
lab reference ranges are not treatment targets
Push back: a value just outside a reference interval is a common finding in healthy people. It is a reason to repeat.
Panicked about a single result, posted here, got told to repeat it, repeated it, and it was fine.
Panicked about a single result, posted here, got told to repeat it, repeated it, and it was fine.
This is the sentence to read before anybody panics about a single value.
Small fix — a reference interval is not a treatment target, and the post above uses them interchangeably.
a single eGFR outside range is a reason to repeat, not to panic
bring the numbers to someone qualified to read them
That is a non-fasting value and the interval you are comparing it against is a fasting one.
do not change three things and then read the panel
Added ApoB to the panel after a thread here. It told me something the standard lipid panel had been hiding.
draw at the same point in the week if you want comparability
- 1Compared two draws across two labs and spent a week worrying before finding…7 comments in this branch · started by u/yara_mensah
- 2hydration status moves a surprising number of markers6 comments in this branch · started by u/neha_rahimi