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Clinical · Bloodwork · continued

Which panel is worth repeating and which is worth ignoring posts 31–60

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1 · go to the accepted answer.

FW
f.weissTL23 Jun 2025 · edited#31
r.aldana_pharmd, post #3: Panel is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at. Go to post

Where a panel includes a calculated value, that value inherits the imprecision of everything it was calculated from and is usually reported without an interval.

This is where my knowledge stops and I would rather mark the edge than blur it.

17 likes in reply to #3 14mo
WN
w.novakTL3Regular5 Jun 2025#32

I would put moderate confidence on the mainstream reading of panel and no more. That is not scepticism for its own sake; it is where the sourcing actually stops.

0 likes 14mo
TK
t.karlsenTL26 Jun 2025#33

Marking my place. If it changes for me I will come back and say so.

1 like 14mo
ST
slow_titratorTL2Regular8 Jun 2025#34

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.

Anyone with a larger sample, please post it.

7 likes 14mo
PM
p.mwangiTL29 Jun 2025#35
slow_titrator, post #34: 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. Anyone with a larger sample, please post it. Go to post

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.

24 likes in reply to #34 14mo
DS
dr_seongTL3Physician11 Jun 2025#36
k.fonseca, post #8: Glycaemic markers integrate over different periods. A point glucose and a longer-term marker disagreeing is not a contradiction; it is two different questions. Go to post

Lipid changes during substantial weight loss are expected and their trajectory is not always monotonic. A single mid-course panel can be misleading.

The short answer was in the first line; everything after is the working.

0 likes in reply to #8 14mo
RF
ro.friskTL212 Jun 2025#37

Adding the measurement that post #34 says would settle it.

Worth separating panel as a question about the compound from panel as a question about the documentation. They get answered by different people and only one of them is answerable here.

3 likes 14mo
CL
customs_ledgerTL3Regular14 Jun 2025#38

Post #36 describes the usual case. This is about the unusual one.

Small correction to my own earlier position on panel. I had the units the wrong way round, which changes the conclusion by an order of magnitude and therefore changes it entirely.

11 likes 13mo
PD
p.dialloTL215 Jun 2025#39
BE
bench_entryTL3Regular17 Jun 2025#40

The reason panel keeps being re-asked is that the answer is conditional and people quote it without the condition. It is not that the answer is unknown.

0 likes 13mo
GI
g.ibarraTL218 Jun 2025 · edited#41
n.moreau, post #14: Adding what did not work for me on panel, since the failures never get written up and they are half the useful information. Go to post

Answering the question post #37 raises rather than the one it answers.

The most useful reply I ever got about panel was a request to state my units. It sounds like pedantry and it has saved me twice.

26 likes in reply to #14 13mo
MY
m.yilmazTL219 Jun 2025#42

The arithmetic in post #41 is right; the assumption feeding it is the part to check.

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 that is already documented somewhere, ignore me and link it.

12 likes 13mo
BP
b.petrovTL221 Jun 2025#43

Nothing in this subcategory is medical advice, and a panel with an unexpected result is precisely the situation where that matters.

I am confident about the direction and much less about the magnitude.

4 likes 13mo
SC
s.cardosoTL222 Jun 2025#44

Counterpoint on panel, offered without confidence: the same observation is consistent with a much duller explanation, and nobody has ruled the dull one out.

0 likes 13mo
AK
a.kowalskiTL224 Jun 2025 · edited#45
j.nascimento, post #11: Post #8 answers the question as asked. The question underneath it is different. The claim about panel upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says "causes". Go to post

Post #41 describes the usual case. This is about the unusual one.

Checked the panel claim against the primary source this morning. It survives, with a narrower scope than the version quoted here. Posting the narrower scope.

19 likes in reply to #11 13mo
JN
j.nwosuTL225 Jun 2025#46
f.haddad, post #1: The question in the title: Which panel is worth repeating and which is worth ignoring I will give what I have already checked below so nobody repeats it. An honest uncertainty about panel rather than a disguised assertion. I do not know the answer and I have not been able to find one. What I have is the shape of the question, which may… Go to post

Adding the measurement that post #45 says would settle it.

Lipid panel interpretation: total, LDL, HDL, triglycerides all on one panel. Reading them together is more informative than reading one value in isolation. An elevated triglyceride with low HDL is different from triglyceride elevation alone.

Genuinely open to being wrong about this one.

8 likes in reply to #1 13mo
SK
s.kimaniTL226 Jun 2025#47

I read the earlier replies on panel twice before writing this, because I had assumed the opposite and wanted to be sure I was disagreeing with what was said rather than what I expected.

2 likes 13mo
EP
e.piresTL228 Jun 2025#48

The honest answer on panel is that it depends, and the useful part is the list of what it depends on. Four items, in rough order of how much they matter.

Most people get the first two right and then argue about the fourth.

0 likes 13mo
DE
d.eriksenTL229 Jun 2025#49
v.stanescu, post #27: I would keep panel 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. Go to post

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.

0 likes in reply to #27 13mo
JM
j.mwangiTL4 Moderator1 Jul 2025#50
m.broberg, post #17: 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. Go to post

Panel came up in a thread eighteen months ago and was answered well. I cannot find it, which is itself the problem, so here is the reconstruction.

25 likes in reply to #17 13mo
GD
glossary_deskTL3Regular2 Jul 2025#51
m.yilmaz, post #42: The arithmetic in post #41 is right; the assumption feeding it is the part to check. 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 that is already documented somewhere, ignore me and link it. Go to post

Post #48 answers the question as asked. The question underneath it is different.

I think the panel question is answerable and has not been answered, which is a more optimistic position than most of this thread.

0 likes in reply to #42 13mo
LK
l.krastevTL23 Jul 2025#52

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.

Posting it because the silence on this was starting to look like agreement.

0 likes 13mo
G
GEldridgeTL3Regular5 Jul 2025#53

Panel would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.

5 likes 13mo
AV
a.vestergaardTL26 Jul 2025#54
t.karlsen, post #33: Marking my place. If it changes for me I will come back and say so. Go to post

Grateful for the specificity. Vague answers to this question are what sent me looking.

13 likes in reply to #33 13mo
AL
aliquot_lineTL3Regular7 Jul 2025#55
glossary_desk, post #51: Post #48 answers the question as asked. The question underneath it is different. I think the panel question is answerable and has not been answered, which is a more optimistic position than most of this thread. Go to post

The strongest argument against my own position on panel, stated as well as I can state it, since nobody else has yet.

27 likes in reply to #51 13mo
AK
a.krastevTL29 Jul 2025#56

Where a panel includes a calculated value, that value inherits the imprecision of everything it was calculated from and is usually reported without an interval.

0 likes 13mo
KB
k.brandl_deTL3Translator · DE10 Jul 2025#57

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.

2 likes 13mo
EN
e.nilsenTL211 Jul 2025#58

Post #55 put the caveat in the right place and I want to underline it.

Distinguishing three things in the panel discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that gets attached to both.

9 likes 13mo
RF
resistance_firstTL2Regular13 Jul 2025#59

Lipid panel interpretation: total, LDL, HDL, triglycerides all on one panel. Reading them together is more informative than reading one value in isolation. An elevated triglyceride with low HDL is different from triglyceride elevation alone.

0 likes 13mo
AT
a.teixeiraTL214 Jul 2025#60