reading ALT threads from 2024 and half of it aged badly
Posting this as a discussion rather than a claim: reading ALT threads from 2024 and half of it aged badly. 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.…
Time of day, fasting state, hydration and recent exercise all move common markers. Standardising the draw conditions is free and it removes most of the apparent variability.
Fasting or not, and what time of day?
This. Reference ranges are population intervals, not targets, and conflating them causes a lot of unnecessary alarm here.
Small fix — a reference interval is not a treatment target, and the post above uses them interchangeably.
That is a non-fasting value and the interval you are comparing it against is a fasting one.
one measurement is a point, two is a line, three is a trend
draw at the same point in the week if you want comparability
Brought the whole set to my clinician rather than one flagged value. Completely different conversation.
Is that the same assay, or did the lab change platforms?
Right, and weight loss itself moves several markers, so attribution is harder than these threads assume.
Agreed. The trend is the signal. A single value is a snapshot of one morning.
Tracked triglycerides against the weight trend for a year. The correlation was much weaker than I expected and that was worth knowing.