Adding the clinical framing, because it changes how the question reads. The version of this that has an answer is narrower than the version being asked. Narrow it and it becomes tractable; leave it broad and the thread will produce nine confident and incompatible replies.
One thing that is still open after LabKate’s answer:
How would you tell the difference between that and the alternative explanation?
Dr.BariatricHTX said:The version of this that has an answer is narrower than the version being asked.
Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. I think the framing smuggles in the conclusion. Ask it the other way round and the obvious answer reverses, which usually means the question is doing the work.
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Browse GL BiochemDr.BariatricHTX said:The version of this that has an answer is narrower than the version being asked.
Agreed, and one caution: a single measurement is not a measurement. Anything that moves day to day needs a trend before it means anything at all.