If a lab says that creatinine is 1.10, it may or may not be elevated based on the reference range. Why are labs like this?
In: Biology
different people have different baselines. this can be for defined medical reasons, or because we’re complicated meat machines that all run a little different.
a fairly common example is body temperature. 99F is above the norm, but isn’t usually regarded as a fever. but for a patient that naturally runs cooler than average, a persistent temperature of 99 could mean an infection.
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