On the subject in the title: Revisiting: Liver enzymes drifting down and what that usually means Working notes rather than a conclusion.
A methods question rather than a substantive one, about Liver enzymes drifting.
Everyone quotes the same figure and I cannot find anyone who says how it was arrived at. That is not an accusation; it usually means the derivation is somewhere obvious and I have missed it.
Reporting rather than recommending, on Liver enzymes drifting. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
I had read the opposite somewhere and cannot now find where, which tells me something.
This follows post #2 rather than contradicting it.
Liver enzyme changes during rapid weight loss are commonly reported and have several possible explanations, which is exactly why they need clinical interpretation rather than forum interpretation.
Worth separating two things that post #5 runs together.
What I can speak to on Liver enzymes drifting is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
Since Liver enzymes drifting keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with more direct experience will review it.
On post #8 — agreed on the reasoning, with one qualification.
Time of day: some biomarkers vary across the day. Cortisol in the morning differs from cortisol in the evening. Comparing results from different times of day is comparing things that are not the same.
Liver enzymes drifting is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
An honest declaration on Liver enzymes drifting: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.
Glycaemic markers integrate over different periods. A point glucose and a longer-term marker disagreeing is not a contradiction; it is two different questions.
If this contradicts something upthread, the upthread version may well be the better one.
Agreed on all of that, and I have nothing to add to it.
Reference intervals: constructed to contain the central 95% of a reference population, which means one in twenty healthy people falls outside one by definition. Add biological variation and analytical imprecision and the base rate of a meaningless flag is substantial.
The literature is thinner on this than the confidence in the thread implies.
On post #15 — agreed on the reasoning, with one qualification.
I would keep Liver enzymes drifting and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and merging them is why the last one went badly.
Picking up post #15: that is the part I would want checked first.
A trend needs at least three points to be a trend. Two points are a line and a line through noise is still a line.
Filing this under things that are true until someone shows me otherwise.
The arithmetic in post #19 is right; the assumption feeding it is the part to check.
Liver enzymes drifting would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
I will take the caveat as seriously as the claim, which is the point of putting it there.
The arithmetic in post #20 is right; the assumption feeding it is the part to check.
Liver enzymes drifting has a well-known answer and a correct answer, and the interesting work is establishing that they are the same. Nobody has done that here yet.
Answering the question post #22 raises rather than the one it answers.
Sample handling before analysis affects several analytes, and a haemolysed sample produces predictable artefacts that a laboratory will usually comment on.
Worth checking against a second source before it gets quoted onward.
Confirming post #24 from a second method, which matters more than confirming it from a second person.
Glycaemic markers integrate over different periods. A point glucose and a longer-term marker disagreeing is not a contradiction; it is two different questions.
Anyone with a larger sample, please post it.
Two sentences on Liver enzymes drifting and then I will stop, because the rest is speculation and the thread is better without mine.
What is documented is narrow. What is inferred from it is broad. The gap between them is where every argument here lives.
A single value outside interval: usually uninformative on a single draw. What makes a result interesting: a trend across multiple draws, a magnitude well beyond the interval, a pattern that coheres with other values, or symptoms that fit.
Post #26 describes the usual case. This is about the unusual one.
Liver enzymes drifting: I would want to see the raw numbers rather than the summary before agreeing. Summaries lose exactly the information that would settle this.
Taking post #28 at face value and following it one step further.
General information rather than advice about anyone's care. A single value outside a reference interval, on a single draw, in an otherwise unremarkable panel, is usually uninformative.