This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.
Adding a small correction to the single out-of-range value summary above rather than a disagreement with it. The substance holds; one of the figures is out by a factor that matters.
What I want from this single out-of-range value thread is the list of things that would need to be true for the claim to hold. If we can write that list, we can check it.
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.
I am confident about the direction and much less about the magnitude.
Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
Careful with the language on single out-of-range value. "Not detected" and "not present" are different findings and the first is a statement about the method.
On post #68 — agreed on the reasoning, with one qualification.
Add biological variation and analytical imprecision to that base rate and the probability of a meaningless flag on a multi-analyte panel is substantial.
A note on how single out-of-range value gets discussed rather than on single out-of-range value itself: the confident posts get the replies and the careful ones get ignored, and the careful ones have been right more often.
Taking post #71 at face value and following it one step further.
Single out-of-range value 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.
Understood. Thank you for being specific about the limits of it.
Post #71 put the caveat in the right place and I want to underline it.
Where the single out-of-range value discussion usually stalls is that nobody wants to say "I do not know" and everyone is willing to say "it varies". Those are the same sentence with different clothes on.
Building on post #75 rather than restating it.
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.
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Building a sensible monitoring schedule with your prescriber
Building a sensible monitoring schedule with your prescriber — setting out what I have, and where I think it stops being reliable. Building a sensible monitoring schedule — I have the observation and I do not…
|
+91 | 108 | 52k | 19mo |
|
[2026 update] Lipid changes during rapid weight loss: the expected trajectory
Lipid changes during rapid weight loss: the expected trajectory Writing it up because I had to work it out twice and would rather nobody else did. Lipid changes during rapid weight keeps being re-asked here…
|
+51 | 56 | 7.1k | 17mo |
|
[2026 update] A single out-of-range value on an otherwise normal panel
On the subject in the title: A single out-of-range value on an otherwise normal panel Working notes rather than a conclusion. General question, not a request for advice about my own care — I know the…
|
+15 | 19 | 53k | 9mo |
|
Which panel is worth repeating and which is worth ignoring — a second dataset
Asking directly, because I could not find a straight answer: Which panel is worth repeating and which is worth ignoring — a second dataset Posting a small dataset on panel. It is mine, it is uncontrolled, and…
|
+108 | 117 | 46k | 4mo |
|
Lipid changes during rapid weight loss: the expected trajectory
Posting this under the heading it deserves: Lipid changes during rapid weight loss: the expected trajectory Everything below is what sits behind that. Lipid changes during rapid weight: what I expected, what…
|
+11 | 15 | 34k | 11h |
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
About the Bloodwork category
Panels, reference intervals, biological variation, and resisting the urge to over-read one result. This post is a community wiki: any member at trust level 3 or above can edit it, and every edit is recorded…
|
+4 | 8 | 4.4k | 3mo |
|
Lipid changes during rapid weight loss: the expected trajectory
Posting this under the heading it deserves: Lipid changes during rapid weight loss: the expected trajectory Everything below is what sits behind that. Lipid changes during rapid weight: what I expected, what…
|
+11 | 15 | 34k | 11h |
|
Fasting versus non-fasting and which tests care
Fasting versus non-fasting and which tests care Writing it up because I had to work it out twice and would rather nobody else did. Fasting versus non-fasting: what I expected, what I found, and the gap…
|
+72 | 78 | 14k | 19h |
|
Lipase elevation without symptoms: the interpretation problem
Lipase elevation without symptoms: the interpretation problem Writing it up because I had to work it out twice and would rather nobody else did. Lipase elevation without symptoms — I have the observation and…
|
+21 | 25 | 62k | 5mo |
|
[2026 update] Thyroid function tests during substantial weight change
Thyroid function tests during substantial weight change Writing it up because I had to work it out twice and would rather nobody else did. What changes if the standard account of Thyroid function tests during…
|
+69 | 74 | 4.5k | 2mo |